FAMILY MUSCID^ 395 



90. Prosternum bare 93 



Prosternum haired 91 



91. First vein with setulee opposite the humeral ci'ossvein.. .Clinopera Wulp 

 First vein bare above on the whole length 92 



92. Facial depression extremely deep, with almost parallel sides; cheeks 



wide (49, 53) ". Charadrella Wulp 



Facial depression very shallow, widening below; cheeks narrow (55). 



Dichaetomyia Malloch 



93. Palpi spatulate, flattened, always strongly widening apically (14, 15). 



*Lispe Latreille 

 Palpi not unusually widened, not flattened apically 94 



94. Calcar pi'esent 95 



Posterior tibije without strong posterodorsal bristle beyond the middle. 104 



95. Fourth vein very strongly curved forward at the apex 96 



Fourth vein not cui-ved forward at the apex. . .Pseudophaonia Malloch 



96. Third and fourth veins equidistant from the wing-tip. 



Hypodermodes Knab 

 Fourth vein ending far behind the wing-tip Mesembrina Meigen 



97. A single pair of presutural dorsocentral bristles 98 



Two pairs of presutui'al dorsocentrals or they are absent lOG 



98. Lower lobe of the squamae much longer than the upper 100 



Lower lobe of the squamas scarcely longer than the upper 99 



99. Front decidedly longer than wide (26) fHoplogaster Rondani 



Front wider than long, narrowing anteriorly (2) . .fSchoenomyza Haliday 



100. Costa extending to the fourth vein 101 



Costa ending at the third vein or a little beyond Allognota Pokorny 



101. Three postsutural dorsocentrals 102 



Two pairs of postsutural dorsocentrals Bithoracochaeta Stein 



102. Posterior tibiae with three long median bristles, one on the postero- 



dorsal surface although this latter may be short 103 



Posterior tibise without a single posterodorsal bristle at the middle, 

 sometimes with two posterodorsals 104 



103. Anterior tibiae with an anterodorsal beyond the middle. 



Macrocoenosia Malloch 

 Anterior tibi« without an anterodorsal bristle (20) .JNeodexiopsis Malloch 



104. Posterior tibiae with an anteroventral bristle 105 



Posterior tibte without an anteroventral bristle. . . . JXenocoenosia Malloch 



105. Posterior tibiae with a long anterodorsal and long anterior bristle 



situated very close to each other (23) §Coenosia Meigen 



Posterior tibiae with anterodorsal and anteroventral bristle, their 

 bases not close together (3) ^Limosia Desvoidy 



* Aldrich, 1913. Journ. N. Y. Ent. Soc, xxi, p. 131. 



t Huckett, 1934, Trans. Amer. Ent. Soc, Ix, pp. 87. 106. 



t Huckett. 1934, Trans. Amer. Ent. Soc, Ix, p. 74 (Neodexiopsis). 



§ Huckett, 1934, Trans. Amer. Ent. Soc, Ix, p. 83. 



U Huckett. 1934, Trans. Amer. Ent. Soc, Ix, p. 135. 



