FAMILY MUSCID.E 387 



E. Pteropleura haired 83 



Pteiopleura bare F 



F. One pair of presutural dorsocentral bristles 98 



More than one pair of presutural dorsocentrals 106 



KEY TO GENERA. 



1. With at most one sternopleural (c. f. Lispoides) 2 



With two to four sternopleurals 38 



2. Pteropleura bare 8 



Pteropleura haired 3 



3. Anterior tibiae without abundant venti-al setulffi 4 



Anterior tibi« beneath with abundant black setulae . . *AlIomyelIa Malloch 



4. First vein bare 5 



First vein setulose apically; sixth vein not reaching wing margin. 



Dasypleuron Malloch 



5. Sixth vein reaching wing margin 6 



Sixth vein not reaching wing margin Eugenacephala Johnson 



6. With distinct sternopleural bristle 7 



Without sternopleural bristle; wings with several brown spots. 



Ernoneura Becker 



7. Propleural bristle long and strong; arista short plumose on whole 



length tMegaphthalma Becker 



Propleural bristle very weak or absent; arista long plumose or bare 

 ( 33 ) Scopeuma Latreille 



8. Head at least as high as long; face at most moderately retreating. ... 11 

 Head decidedly longer than high, the face strongly retreating below. . 9 



9. Stigmatal bristle absent 10 



Stigmatal bristle strong Paratidia Malloch 



10. Third antennal segment with a fine, long hair on the outer surface 



near the insertion of the arista (41 ) JAcicephala Coquillett 



Third antennal segment without such hair $Pseudacicephala Malloch 



11. Hypopleura never with bristles 12 



Hypopleura with a row of bristles; costa ending at third vein, the 



fourth vein incomplete; front half as wide as head (Eginiinae). 

 (52, 59) §Lutzomyia, n. g. 



12. Frontal bristles or hair long 13 



Frontal bristles extremely short, the front nearly bare (40). 



Hydromyza Fallen 



» Curran, 1927, Can. Ent., lix, p. 260. 



t Curran, 1933. Amer. Mus. Novit. No. 682. p. 10. 



+ Curran, 1927. Can. Ent.. lix. p. 259 ( Acicephala) . 



§ Differs from Egriniella Malloch (China) in having the front of the male half as wide as 

 the head and in lacking bristles on the legs, with the exception of the apical tibial bristles. 

 Lutzomyia amcricana, n. sp. from Arizona. 



