236 Journal New York Entomological Society. ["^'°i- ^xi. 



fourth veins convergent, ending at wing-tip ; base of costa not bristly ; 



palpi elongate. (Africa.) Leptometopa Becker. 



Head higher than long, the lower side not entirely horizontal ; front not 

 narrowed ; first posterior cell not narrowed, ending beyond the wing- 

 tip ; palpi short and broad 15. 



15. Antennae broadly separated by the large carinate lunule; oral margin re- 



tracted ; base of costa not bristly ; pteropleural bristle present. (Asia.) 



Hypaspistomyia Hendel. 

 Antennal grooves confluent, the lunule not large; vibrissal angle promi- 

 nent 16. 



16. Base of costa furnished with bristly hairs; whole body opaque; cruciate 



bristles of front strong and usually on evident stripes ; the two upper 

 fronto-orbitals bent outward. (Europe, Asia, Africa, North America.) 



Desmometopa Loew. 



Base of costa not bristly ; body polished ; cruciate bristles delicate, of the 



upper fronto-orbitals the anterior is proclinate, the other reclinate. 



(Europe, North America.) Madisa Fallen. 



17. Under side of head long, straight, horizontal, the epistome projecting; 



front narrowed, with a longitudinal depression on each side ; face 

 carinate; abdomen pruinose ; anterior dorsocentrals absent. (North 



America.) Platophrymyia Williston. 



. Under side of head rounded, not entirely horizontal ; front quadrate ; 

 abdomen not pruinose ; palpi greatly compressed 18. 



18. Four strong dorsocentrals and one presutural present; third antennal joint 



very large, in the male quadrate ; arista loosely pubescent ; eyes 

 hairy ; three upper fronto-orbitals ; scutellar bristles diverging ; palpi 

 bristly; dark pollinose species. (Europe, North America.) 



Phyllomysa Fallen. 



Anterior dorsocentrals rarely present ; eyes nearly or quite bare ; palpi not 



markedly bristly ; shining or subshining species 19. 



19. Anterior fronto-orbitals wanting, leaving only the upper three ; apical scu- 



tellars converging ; antennae normal 20. 



About six pairs of fronto-orbitals descending quite to the antennae, the 

 lower set converging ; proboscis slender, the part folding back as long 

 as the middle portion ; one or two dorsocentrals ; no mesopleural 

 bristle 21. 



20. One dorsocentral and one pair prescutellars on the same transverse line, 



two supra-alars, one sternopleural ; the upper fronto-orbitals on a 

 line with the posterior ocelli, the second a little above the middle of 

 the distance between the lower ocellus and the antennae, the lowest 

 immediately below the second and proclinate; cheeks narrow. (Eu- 

 rope, North America.) Cacoxenus Loew. 



One anterior and three posterior dorsocentrals, three rows of acrostichals, 

 no prescutellar, three weak supra-alar and one intra-alar; no sterno- 

 pleural, one weak and one strong mesopleural ; the three uniformly 



