Figures 151–155 in Observations on Antennal Morphology in Diptera, with Particular Reference to the Articular Surfaces between Segments 2 and 3 in the Cyclorrhapha

Figures 151–155. Antennae of Platystomatidae. (151) Atopognathus complens (Walker), left seg. 2, distal view, seg. 3 removed. (152) The same, dorsal view of left seg. 2. (153) Mesanopin biplexum Whittington, pedicellar cup and contents. (154) A. complens, part of left seg. 3, medial view. (155) M. biplexum, the same parts. bf, basal foramen of seg. 3; bs, basal stem of seg. 3; bu, pedicellar button; c, conus; fc, foraminal cusps; pc, pedicellar cleft.