Figures 178–181 in Observations on Antennal Morphology in Diptera, with Particular Reference to the Articular Surfaces between Segments 2 and 3 in the Cyclorrhapha

Figures 178–181. Antenna of Mormotomyia hirsuta Austen (fam. Mormotomyiidae), male. (178) Segs 1 and 2, dorsolateral view. (179) Distal articular surface of seg. 2, seg. 3 removed. (180) Part of distal articular surface, showing button. (181) Left seg. 3, lateral view. bf, basal foramen; bh, basal hollow; bs, basal stem; bu, pedicellar button; c, conus; pc, pedicellar cleft; sc, sacculus.