Figures 172–173. Antennal segment 2 in Observations on Antennal Morphology in Diptera, with Particular Reference to the Articular Surfaces between Segments 2 and 3 in the Cyclorrhapha

Figures 172–173. Antennal segment 2 of Calyptratae, distodorsal view. (172) Stomorhina discolor (Fabricius) (fam. Rhiniidae), male. (173) McAlpine's fly (? fam.), female. as, abraded surface; bu, pedicellar button.