334 A. L. MELANDER. 



as long as height of the head, body opaque, not pruinose, the hairs rather long, on 

 the mesonotum abundant, on the abdomen sparse, scutelluni bearing four bristles ; 

 under side of front and middle femora, both sides of the hind ones and outer side 

 of hind tibise ciliate nearly their entire length with rather long hairs, first joint 

 of hind tarsi noticeably thicker than that of either of the other tarsi, much nar- 

 rower than the hind tibiae ; wings hyaline, veins and stigma brown, venation 

 nornuil, last section of fifth vein two-thirds as long as the preceding section, sixth 

 vein obsolete beyond end of anal cell. 2 mm. 



Alaska. 



Holoclera bilineata sp. nov. (Fig. 99). 



Length 1.75 mm. — Black, covered with dark olivaceous gray dust. Eyes large, 

 broadly contiguous, facets small. Antennte one-half the eye-height, first joint 

 invisible, third joint lanceolate, the style two-thirds as long as the third joint. 

 Proboscis very short, horizontal, hairy beneath ; palpi short, black. Thorax re- 

 markably hunchbacked, the dust obliterated on the dorsum along two narrow 

 vittse, but bounding these becoming black ; mesonotal bristles black, dense, short 

 in front; scutellum with about six marginal bristles. Hairs of abdomen fine, 

 yellow; hypopygium smaller than in the preceding species, pedunculate and 

 flexed to the right, its parts not visible. Legs, including tip of coxse yellowish- 

 brown, middle femora with a few apical cilia below, hind femora ciliate above 

 and hind tibiue outwardly; hind tibise enlarged and compressed, hind metatarsi 

 distinctly enlarged, but not nearly as much so as the tibise, as long as the three 

 following joints only. Halteres yellowish. Wings clear hyaline, veins narrow, 

 an elliptical brown stigma present; the vein between the discal cell and the 

 third posterior three times that between the discal and the second posterior 

 cells; the hind margin of the discal cell sub-equal to its prolongation. 



Nine males; Opelousas, La. (G. R. Pilate). 



Holoclera sycopliuutor sp. nov. 

 Length 2 mm. — Wholly black, opaque, dusted with dark olivaceous. Eyes large, 

 broadly contiguous on the front, facets small. Antennte short, apparently two- 

 jointed as the first joint is minute; third joint broad at the base then suddenly 

 attenuate and lengthened, its style slender, one-half the length of the third joint. 

 Proboscis shorter than the length of the head, horizontal ; palpi conspicuous, 

 black-bristly, porrect also. Occiput regularly ciliate with close bristles. Thorax 

 sparsely black-bristly, the bristles long ; scutellum with four bristles. Abdomen 

 cylindrical, covered with long black bristles; hypopygium large, flexed toward 

 the right, the central filament exposed at the tip, horizontal, piceous. Legs 

 moderately short, especially the anterior pairs, stoutish, black, the upper side of 

 all the femora, the lower side of the hind ones (and sparsely so on the middle 

 ones), the outer side of all the tibiae, especially the hind ones, ciliate with black 

 hairs; hind tibiae enlarged apically, but compressed ; hind metatarsi a little larger 

 than the other joints but of less length than the rest of the tarsus taken together. 

 Halteres infuscated. Wings smoky, veins dark, stigma indistinct ; the outward 

 boundaries of the discal cell sub-equal. 



Eight males; Idaho (Prof. J. M. Aldrich). 



It may be noticed that only males of this genus have so far been 

 taken in North America. 



