FAMILY TACHINID.^ THE TACHINIDS 435 



112. Apical cell long petiolate or the apical crossvein absent. 



Besseria Desvoidy 

 Apical cell open near the wing-tip Apinops Coquillett 



113. Oral vibrissse situated high above the oral margin or not strongly 



differentiated; if the abdomen bears bristles the apical cell is open. 117 

 Oral vibrissse sti'ongly developed, level with the strongly produced 

 oral margin 114 



114. Apical cell long petiolate (55) Catharosia Rondani 



Apical cell open or closed in or near the wing-tip 115 



115. Parafacials bare on lower half 116 



Parafacials with bristly hairs Chiricahuia Townsend 



116. Abdomen with bristles. . Erythromelana Townsend 



Abdomen with weak, bristly hairs apically; apical crossvein absent. 



Bezzimyia Townsend 



117. Anterior femora with only the usual fine or bristly hairs beneath.. 118 

 Anterior femora on the apical half of the ventral edges with row 



of short stout, bristly setulse Gymnosoma Meigen 



118. Abdomen flattened or twice as long as wide 119 



Abdomen strongly convex, hemispherical (10) Cistogaster Latreille 



119. Apical cell broadly open or closed in the costa near the wing-tip 120 



Apical cell long petiolate 122 



120. Abdomen without bristles 121 



Abdomen with well developed bristles on the apical segments. 



Trichoclytia Townsend 



121. A row of dorsocentrals, one situated in front of the suture (92). 



Chryseria Desvoidy 

 At most two pairs of conspicuous dorsocentrals Phasia Latreille 



122. Pleura with very dense pale hairs above (15, 20, 21, 22). 



Alophora Desvoidy 

 Pleura with ordinary black hairs and bristles Hyalomya Desvoidy 



123. Parafacials with one or more downwardly directed bristles below the 



frontal row or with hairs extending to or below the middle 124 



Parafacials with at most a few hairs below the lowest f rentals 138 



124. With one or more downwardly directed parafacial bristles 125 



Without strong parafacial bristles, the hairs sometimes stout but 



always weaker than the lower frontals 129 



125. Apical cell open; apical section of fifth vein over half as long as the 



preceding section 126 



Apical cell long petiolate *Hesperophasia Townsend 



126. Parafacials with several downwardly directed bristles 127 



Parafacials with a single downwardly directed bristle (8). 



Voria Desvoidy 



* Cunan. 1927. Can. Ent., p. 300. 



