FAMILY MUSCID.E 



399 



136. Avista plumose (short in Dendrophaonia) 137 



Arista pubescent 139 



137. Cheeks below with two or more strong, upcui-ved bristles on the an- 



terior half Dendrophaonia Malloch 



Cheeks without outstanding-, upcurved bristles below, though usually 

 with upcurved hairs 138 



138. Eyes of males with enlarged facets in front on the upper part and 



quite evidently flattened; posterior tibiae without posterodorsal 

 bristles, the front tibiae bristleless; small species, the females shin- 

 ing *Hebecnema Schiner 



Eyes of males not strikingly flattened; usually larger species (1, 10). 



fHelina Desvoidy 



139. Cheeks half as wide as the eye-height, with bristles along the oral 



margin (6) JPhyllogaster Stein 



Cheeks narrower, with hair on lowest three-fourths or more 140 



140. Fourth vein conspicuously curved forward apically. 



Neomuscina Townsend 

 Fourth vein at most weakly curved forward apically 141 



141. Prealar bristle absent 143 



Prealar bristle present 142 



142. Lower squamal lobe produced inwardly (51, 54) §PhiIornis Macquart 

 Lower squamal lobe small and not produced inwardly. 



TiPogonomya Rondani 



143. Two strong intra-alar bristles Lispoides Coquillett 



At most one weak intra-alar Pogonomyioides Malloch 



144. Proboscis elongate and horny 145 



Proboscis short and thick, the labellse fleshy Hemichlora Wulp 



145. Palpi short Stomoxys Geoffroy 



Palpi very long and narrow Haematobia St. Fargeau & Sei-ville 



* This ,<?enus cannot be distinguished from Helina with any degree of success and should 

 no doubt be united with it. 



t Malloch, 1920. Can. Ent. liii, p. 1U3. 



J Malloch, 1923, Can. Ent. Ivi, p. 11. 



§ Aldiich, 1923, Ann. Ent. Soc. Amer., xvi, p. 308. 



'' Malloch, 1918, Tr. Amer. Ent. Soc, xliv, p. 277. 



Scopeuma furcata Say. 



