FAMILY MUSCID.^3 . 397 



112. Posterior tibiae Mith dorsal bristle near or somewhat beyond the mid- 



dle, or with two posterodorsal bristles 11.3 



Posterior tibiae without dorsal or posterodorsal bristles. .Azelia Desvoidy 



113. Eyes of male very broadly separated; posterior tibiae sometimes with 



two posterodorsal bristles and without the dorsal. .. .Euryomma Stein 

 Eyes of male approximate, the front at least narrowed; dorsal tibial 

 bristle always present (7, 8) *Fannia Desvoidy 



114. Proboscis long and narrow, widened basally, adapted for blood-suck- 



ing- Bdellolarynx Austen 



Proboscis short and thick, the labellae fleshy 115 



115. Presternum bare 119 



Prosternum haired laterally 116 



116. Posterior thoracal spiracle long and narrow. 



Synthesiomyia Brauer & Bergenstamm 

 Posterior thoracal spiracle little longer than wide 117 



117. Hypopleura hairy in front of and below the spiracle. . .Ariciella Malloch 

 Hypopleura bare 118 



118. Basal abdominal sternite bare (16, 47) tLimnophora Desvoidy 



Basal abdominal steniite with several hairs (12, 13). 



tPseudoliranophora Schnabl 



119. Third vein with setse basally on the upper margin or before the furca- 



tion ." 120 



Third vein bare above 122 



120. Lower lobe of the squamae large, its inner end reaching the base of 



the scutellum (45) Graphomya Desvoidy 



Lower squamal lobe narrow, not produced inwardly 121 



121. Fourth vein ending in the wing tip or very close to it (37, 56). 



Myospila Rondani 

 Fourth vein ending far behind the wing tip, not conspicuously curved 

 forward apically JMydaea Desvoidy 



122. Posterior coxse bare behind at apex 124 



Posterior coxse \\'ith hairs behind at apex 123 



123. Eyes pilose (4, 5) §Lasiops Meigen 



Eyes bare Alloeostylus Schnabl 



124. Fourth vein strongly curved forward apically 125 



Fourth vein not or very slightly curved foi-ward apically 127 



125. Fourth vein ending well behind the tip of the wing 126 



Fourth vein ending before the tip of the wing. 



Pararicia Brauer & Bergenstamm 



126. Posterior spiracle twice as long as wide, with black hairs extending 



over the lower flap Muscina Desvoidy 



Posterior spiracle not nearly twice as long as wide. .Bigotomyia Malloch 



127. Posterior tibiae, posterodorsally, bare or with two or more bristles. .129 

 Posterior tibiae with only the calcar, rarely with a very short postero- 

 dorsal bristle near the base 128 



128. Cheeks below with two to five upwardly curving bristles on the an- 



terior half Dendrophaonia Mallocli 



Cheeks with at most one upwardly curving bristle 133 



* Malloch, 1924, Ann. Ma'-c. Nat. Hist., xiii, p. 416; xiv, p. 515. 



t Huckett, 1932, Jouin. N. Y. Ent. Soc, xi, pp. 25-76, 105-158, 279-325. 



J Malloch, 1923, Can. Ent., Ivi, p. 220. 



§ Malloch, 1920, Can. Ent., liii, p. 272 (Trichopticus). 



