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133 results for “Halictus”
Data from: Phenological, but not social, variation associated with climate differences in a eusocial sweat bee, Halictus ligatus, nesting in southern Ontario
Studies of annual and geographic variation in eusocial bee populations suggest that more stringent environmental conditions result in stronger reproductive skew favouring queens, while moderate conditions favour increasing worker reproduction. To test these predictions, we compared the phenology and colony development of H. ligatus nesting in St. Catharines, Ontario, Canada to a previously studied aggregation 90 km north of St. Catharines, in Victoria, Ontario. Despite the close proximity of these two locations, St. Catharines has markedly shorter winters and longer summers. Comparisons between St. Catharines in 2006 and Victoria in the 1980s and 1990s incorporate both geographic differences in climate and temporal differences due to climate change. We predicted that St. Catharines foundress queens should emerge from hibernation and initiate nests earlier in spring, giving them time to produce more workers. Since earlier studies indicated that queens have difficulty suppressing worker reproduction in larger colonies, we also predicted higher rates of worker ovarian development in St. Catharines. In spring and summer 2006, we excavated 65 H. ligatus nests, comparing their contents to 713 specimens collected in pan traps. As predicted, nests were initiated about a month earlier in St. Catharines than in Victoria, but contrary to prediction, fewer workers were produced in St. Catharines. St. Catharines workers were just as likely to have developed ovaries as Victoria workers. About 40% of St. Catharines workers were classified as reproductive, and larger reproductive workers tended to have higher ovarian scores. Early queen mortality in the longer nest cycle of St. Catharines bees may have enhanced opportunities for worker reproduction despite their smaller numbers. Novel features of H. ligatus sociobiology in St. Catharines included evidence that queens can initiate new nests following the loss of their first brood, overlap between worker and gyne production within some nests, and high rates of independent nest founding by worker-sized females, suggesting that many worker-brood females overwinter. Overall, the distinctly warmer climate of St. Catharines compared to Victoria led to earlier nest initiation and lengthening of the flight season, but not to the predicted differences in colony social organisation or queen-worker reproductive skew. A second objective of our study was to assess how well pan trap collections capture important information about demographic and social parameters important in assessing social variability in sweat bees. Nest excavations and pan traps produced similar results, suggesting that pan traps are a good alternative when nest excavations are impossible.
FIGURES 52a–e. Halictus truncaticollis Morawitz, 1877 in The type specimens of bees (Hymenoptera, Apoidea) deposited in the Zoological Institute of the Russian Academy of Sciences, St. Petersburg. Contribution I. Family Halictidae, genus Lasioglossum Curtis, 1833
FIGURES 52a–e. Halictus truncaticollis Morawitz, 1877. Lectotype, female: a—habitus, lateral view; b—metasoma, dorsal view; c—mesosoma, dorsal view; d—head, frontal view; e—labels.
FIGURES 53a–e. Halictus upinensis Morawitz, 1890 in The type specimens of bees (Hymenoptera, Apoidea) deposited in the Zoological Institute of the Russian Academy of Sciences, St. Petersburg. Contribution I. Family Halictidae, genus Lasioglossum Curtis, 1833
FIGURES 53a–e. Halictus upinensis Morawitz, 1890. Lectotype, female: a—habitus, lateral view; b—metasoma, dorsal view; c—mesosoma, dorsal view; d—head, frontal view; e—labels.
FIGURES 47a–e. Halictus salinus Morawitz, 1876 in The type specimens of bees (Hymenoptera, Apoidea) deposited in the Zoological Institute of the Russian Academy of Sciences, St. Petersburg. Contribution I. Family Halictidae, genus Lasioglossum Curtis, 1833
FIGURES 47a–e. Halictus salinus Morawitz, 1876. Lectotype, female: a—habitus, lateral view; b—metasoma, dorsal view; c—head, frontal view; d—mesosoma, dorsal view; e—labels.
FIGURES 45a–e. Halictus riparius Morawitz, 1874 in The type specimens of bees (Hymenoptera, Apoidea) deposited in the Zoological Institute of the Russian Academy of Sciences, St. Petersburg. Contribution I. Family Halictidae, genus Lasioglossum Curtis, 1833
FIGURES 45a–e. Halictus riparius Morawitz, 1874. Lectotype, female: a—habitus, lateral view; b—metasoma, dorsal view; c—head, frontal view; d—mesosoma, dorsal view; e—labels.
FIGURES 43a–e. Halictus puncticollis Morawitz, 1872 in The type specimens of bees (Hymenoptera, Apoidea) deposited in the Zoological Institute of the Russian Academy of Sciences, St. Petersburg. Contribution I. Family Halictidae, genus Lasioglossum Curtis, 1833
FIGURES 43a–e. Halictus puncticollis Morawitz, 1872. Lectotype, female: a—habitus, lateral view; b—metasoma, posterolateral view; c—mesosoma, dorsal view; d—head, frontal view; e—labels.
FIGURES 41a–e. Halictus porcus Morawitz, 1872 in The type specimens of bees (Hymenoptera, Apoidea) deposited in the Zoological Institute of the Russian Academy of Sciences, St. Petersburg. Contribution I. Family Halictidae, genus Lasioglossum Curtis, 1833
FIGURES 41a–e. Halictus porcus Morawitz, 1872. Lectotype, female: a—habitus, lateral view; b—head, frontal view; cmetasoma, dorsal view; d—mesosoma, dorsal view; e—labels.
FIGURES 37a–e. Halictus pallipes Morawitz, 1865 in The type specimens of bees (Hymenoptera, Apoidea) deposited in the Zoological Institute of the Russian Academy of Sciences, St. Petersburg. Contribution I. Family Halictidae, genus Lasioglossum Curtis, 1833
FIGURES 37a–e. Halictus pallipes Morawitz, 1865. Lectotype, female: a—habitus, lateral view; b—metasoma, dorsal view; c—mesosoma, dorsal view; d—head, frontal view; e—labels.
FIGURES 34a–e. Halictus olivaceus Morawitz, 1890 in The type specimens of bees (Hymenoptera, Apoidea) deposited in the Zoological Institute of the Russian Academy of Sciences, St. Petersburg. Contribution I. Family Halictidae, genus Lasioglossum Curtis, 1833
FIGURES 34a–e. Halictus olivaceus Morawitz, 1890. Lectotype, female: a—habitus, lateral view; b—metasoma, dorsal view; c—mesosoma, dorsal view; d—head, frontal view; e—labels.
FIGURES 33a–e. Halictus ocularis Morawitz, 1893 in The type specimens of bees (Hymenoptera, Apoidea) deposited in the Zoological Institute of the Russian Academy of Sciences, St. Petersburg. Contribution I. Family Halictidae, genus Lasioglossum Curtis, 1833
FIGURES 33a–e. Halictus ocularis Morawitz, 1893. Lectotype, male: a—habitus, lateral view; b—metasoma, dorsal view; c—head, frontal view; d—mesosoma, dorsal view; e—labels.
FIGURES 32a–e. Halictus nodicornis Morawitz, 1890 in The type specimens of bees (Hymenoptera, Apoidea) deposited in the Zoological Institute of the Russian Academy of Sciences, St. Petersburg. Contribution I. Family Halictidae, genus Lasioglossum Curtis, 1833
FIGURES 32a–e. Halictus nodicornis Morawitz, 1890. Lectotype, male: a—habitus, lateral view; b—metasoma, dorsal view; c—head, frontal view; d—mesosoma, dorsal view; e—labels.
FIGURES 31a–e. Halictus nigricornis Morawitz, 1887 in The type specimens of bees (Hymenoptera, Apoidea) deposited in the Zoological Institute of the Russian Academy of Sciences, St. Petersburg. Contribution I. Family Halictidae, genus Lasioglossum Curtis, 1833
FIGURES 31a–e. Halictus nigricornis Morawitz, 1887. Lectotype, female: a—habitus, lateral view; b—metasoma, dorsal view; c—mesosoma, dorsal view; d—head, frontal view; e—labels.
FIGURES 44a–e. Halictus resplendens Morawitz, 1890 in The type specimens of bees (Hymenoptera, Apoidea) deposited in the Zoological Institute of the Russian Academy of Sciences, St. Petersburg. Contribution I. Family Halictidae, genus Lasioglossum Curtis, 1833
FIGURES 44a–e. Halictus resplendens Morawitz, 1890. Lectotype, female: a—habitus, lateral view; b—metasoma, dorsal view; c—head, frontal view; d—mesosoma, dorsal view; e—labels.
FIGURES 39a–e. Halictus pleuralis Morawitz, 1872 in The type specimens of bees (Hymenoptera, Apoidea) deposited in the Zoological Institute of the Russian Academy of Sciences, St. Petersburg. Contribution I. Family Halictidae, genus Lasioglossum Curtis, 1833
FIGURES 39a–e. Halictus pleuralis Morawitz, 1872. Holotype, female: a—habitus, lateral view; b—metasoma, posterolateral view; c—head, frontal view; d—mesosoma, dorsal view; e—labels.
FIGURES 30a–e. Halictus nigriceps Morawitz, 1880 in The type specimens of bees (Hymenoptera, Apoidea) deposited in the Zoological Institute of the Russian Academy of Sciences, St. Petersburg. Contribution I. Family Halictidae, genus Lasioglossum Curtis, 1833
FIGURES 30a–e. Halictus nigriceps Morawitz, 1880. Lectotype, male: a—habitus, lateral view; b—mesosoma, dorsal view; c—metasoma, dorsal view; d—head, frontal view; e—labels.
FIGURES 29a–e. Halictus morbillosus orientis Cockerell, 1924 in The type specimens of bees (Hymenoptera, Apoidea) deposited in the Zoological Institute of the Russian Academy of Sciences, St. Petersburg. Contribution I. Family Halictidae, genus Lasioglossum Curtis, 1833
FIGURES 29a–e. Halictus morbillosus orientis Cockerell, 1924. Lectotype, female: a—habitus, lateral view; b—metasoma, dorsal view; c—head, frontal view; d—mesosoma, dorsal view; e—labels.
FIGURES 27a–e. Halictus mandibularis Morawitz, 1866 in The type specimens of bees (Hymenoptera, Apoidea) deposited in the Zoological Institute of the Russian Academy of Sciences, St. Petersburg. Contribution I. Family Halictidae, genus Lasioglossum Curtis, 1833
FIGURES 27a–e. Halictus mandibularis Morawitz, 1866. Holotype, female: a—habitus, lateral view; b—metasoma, dorsal view; c—head, frontal view; d—mesosoma, dorsal view; e—labels.
FIGURES 28a–e. Halictus monstrificus Morawitz, 1891 in The type specimens of bees (Hymenoptera, Apoidea) deposited in the Zoological Institute of the Russian Academy of Sciences, St. Petersburg. Contribution I. Family Halictidae, genus Lasioglossum Curtis, 1833
FIGURES 28a–e. Halictus monstrificus Morawitz, 1891. Lectotype, male: a—habitus, lateral view; b—metasoma, dorsal view; c—head, frontal view; d—mesosoma, dorsal view; e—labels.
FIGURES 24a–b. Halictus laticeps Morawitz, 1889 in The type specimens of bees (Hymenoptera, Apoidea) deposited in the Zoological Institute of the Russian Academy of Sciences, St. Petersburg. Contribution I. Family Halictidae, genus Lasioglossum Curtis, 1833
FIGURES 24a–b. Halictus laticeps Morawitz, 1889. Lectotype, female: a—habitus, lateral view; b—metasoma, dorsal view; c—head, frontal view; d—mesosoma, dorsal view; e—labels.
FIGURES 23a–e. Halictus laevinodis Morawitz, 1876 in The type specimens of bees (Hymenoptera, Apoidea) deposited in the Zoological Institute of the Russian Academy of Sciences, St. Petersburg. Contribution I. Family Halictidae, genus Lasioglossum Curtis, 1833
FIGURES 23a–e. Halictus laevinodis Morawitz, 1876. Holotype, female: a—habitus, lateral view; b—metasoma, dorsal view; c—mesosoma, dorsal view; d—head, frontal view; e—labels.
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