292 Journal New York Entomological Society. fVoi. xxi. 



processes. Legs without bristles and with ordinary hairs; the middle 

 tibiae tipped with a long spur. Calypteres rudimentary, fringed with 

 but four hairs. Wings about two and one half times as long as wide; 

 costa stopping at the fourth vein, weakened but not actually broken 

 some distance before the end of the first vein, the second section of 

 the costa two times as long as the third, which is twice the length of 

 the fourth section; auxiliary vein straight, vanishing halfway between 

 the humeral cross-vein and the end of the first vein; the first vein 

 extending two fifths the length of the wing; third and fourth veins 

 slightly converging, the anterior cross-vein before the middle of the 

 long discal cell, the sections of the fourth vein proportioned about 

 three to four, those of the fifth vein about six to one, the posterior 

 cross-vein longer than the ultimate section of the fifth and one half 

 the length of the penultimate section of the fourth vein ; basal cells 

 completely formed and elongate, anal vein extending one half the 

 way to the margin of the wing. 



Type species : Cyamops nehulosa, new species, following. 



Cyamops nebulosa new species. 



Male. — Length 2.5 mm. Shining, blackish, the lower part of the front 

 opaque black, with white-pollinose orbits, the face and cheeks whitish-pollinose. 

 Legs including the coxae yellowish, the outer two thirds of the femora black- 

 ish, the tip of the tarsi brown. Halteres with large white knob ; calypteres 

 margined with brown. Center of wing with a large brownish cloud, the apex 

 similarly clouded. 



One specimen. Woods Hole, Massachusetts. July 7, 1902. 



While this insect is markedly different from the other Geomyzinae, 

 yet it finds its best location here. The only other groups with which 

 it could be confused are the Psilinae and the Drosophilinse. 



MUTILOPTERA Coquillett. 



Yellow, the abdomen black. Wings hyaline, the apex brown, which color ex- 

 tends half way to the posterior cross-vein ; cross-veins of equal 

 length, the posterior clouded with brown. 2 mm. (N. Dak.) (Proc. 

 Ent. Soc. Wash., IX, 148, 1907.) apicalis Coquillett. 



ISCHNOMYIA Loew. 



With darker spot at end of second vein, all the other veins bordered with 

 brown ; upper vibrissae long ; palpi brownish ; pleurae largely blackish ; 

 front femora with strong thorn beneath. 3 mm. (Mich.*) (Wien. 

 ent. Ztg., XXX, 45, 191 1; Williston, Manual, 3 ed., p. 80, fig. 14.) 



spinosa Hendel 



