ART. 9 TWO- WINGED FLIES OF TRIBE MILTOGRAMMINI ALLEN 17 



conica belongs to Sphecapata of which it is the genotype, which equals 

 Senotainia, an earlier name. Hence Misellia equals Senotainia. 



Euselenomyia Townsend, Proc. U. S. Nat. Mus., vol. 43, p. 364, 1912. 

 Genotype, peruviensis examined by the writer. 



Microsenotainia Townsend, Proc. U. S. Nat. Mus., vol. 49, p. 618, 1915. 

 Genotype, Senotainia nana Coquillett, examined by the writer. 



Eusenotainia Townsend, Proc. Biol. Soc. Wash., vol. 28, p. 22, 1915. Geno- 

 type, Hilarella rufiventris Coquillett, examined by the writer. 



Frontal vitta at most slightly wider than parafrontals; proclinate 

 ocellar bristles present; a single row of frontals not descending below 

 base of antennae and not suddenly divergent below; from two to 

 several pairs of orbital bristles present in both sexes; front slightly 

 narrower in females than in males; arista stubby, penultimate joint at 

 most scarcely twice as long as wide; vibrissae differentiated from other 

 hairs about the mouth; facial ridges without macrochaetae, bristly 

 on not more than lowest fourth; parafacials liairy or not, but never 

 with macrochaetae on lowest half; in profile, head length at vibrissae 

 nearly or quite ecmals that at base of antennae; proboscis slender, 

 and nearly as long as head height; facets at extreme front several times 

 larger than those at sides of eye; bucca and back of head without pale 

 hairs. Convex, posterior part of sternopleuron triangular in outline; 

 two similar, brush like flaps of hairs close the mesothoracic spiracle, 

 the hind llap not differentiated in the shape of a conspicuous oval 

 plume. Male genitalia (pi. 2 figs. 7, 8, 9, 10, 11) in repose usually 

 protruding somewhat conspicuously from tip of abdomen ; penis with 

 membranous spiniferous hood, frequently saclike and collapsible; 

 posterior clasper with a prominent bristle; female genitalia in the form 

 of non-piercing larvipositors telescoped in the abdomen, in repose. 

 Wings (pi. 4, fig. 24) hyaline; apical cell open; last section of fifth vein 

 distinctly less than half the preceding section; veins without bristles 

 save for one to several small ones at base of third vein. Pulvilli of 

 male nearly or cjuite as long as last tarsal joint and much longer than 

 those of female. 



The female reproductive organs of three species have been dissected 

 (pi. 4, figs. 20, 22, 25). In all, the uterus was found to be very short, 

 with a conspicuous pouch-like expansion, containing, in mature 

 specimens, large active larvae. Considerable difference in con- 

 formation of the various organs of reproduction was noted in the 

 species dissected but this may have been due more largely to variation 

 of stage of maturity than to specific differences. 



First instar maggots of four species have been examined. In all, the 

 cuticle is of about the same texture dorsally and ventrally, and is 

 drawn into flat, longitudinal ribs or corrugations on the posterior 

 two-thirds of each segment. The anterior third of each segment is 

 armed with flat, minute scales, not strongly chitinized and scarcely 

 visible except under a high power objective. The maggots are 



