Figures 169–171 in Observations on Antennal Morphology in Diptera, with Particular Reference to the Articular Surfaces between Segments 2 and 3 in the Cyclorrhapha

Figures 169–171. Basal part of left seg. 3, lateral view, of Calyptratae. (169) Musca vetustissima Walker (fam. Muscidae), male. (170) McAlpine's fly (fam. near Anthomyiidae or Mystacinobiidae), female. (171) Amenia chrysame (Walker) (fam. Calliphoridae), female. a5, antennal segment 5; bf, basal foramen, not visible in Fig. 169; bh, basal hollow; pp, postpedicellar pouch; sc, sacculus; ss, secondary sacculi.