Figure 95 from: Onuferko TM (2018) A revision of the cleptoparasitic bee genus Epeolus Latreille for Nearctic species, north of Mexico (Hymenoptera, Apidae). ZooKeys 755: 1-185. https://doi.org/10.3897/zookeys.755.23939

Figure 95 Head (in posterior view) removed from female A E. ainsliei, in which the preoccipital ridge joins the hypostomal carina, and B E. attenboroughi holotype, in which the preoccipital ridge does not join the hypostomal carina. Scale bars 1 mm. Note that these features can be seen without having to detach the head.