OF WASHINGTON, VOLUME XVII, 1915 105 



male very narrow, about one-third width of either eye, in female wider 

 than either eye. Antenna? scarcely reaching to lower half of face, vib- 

 rissse rather weak, situated at least the length of second antennal joint 

 above front edge of oral margin. Facial ridges almost bare, only a few 

 weak bristles on their lower fourth. Cheeks in male almost linear, in 

 female not more than one-fourth eye height in width. Frontal bristles 

 not descending below base of antennae. Ocellar bristles directed for- 

 ward. Wings (fig. 2) whitish hyaline, costal spine obsolete, fourth longi- 

 tudinal vein absent beyond the bend, third vein ending in costa close to tip 

 of wing, anal vein weak, not reaching posterior margin. Puparium with 

 anal stigmata (fig. 4 and 5) projecting, knobbed, closely approximated. 



Goquillettina plankii, new species. 



Type, the following new species. 



Male. Rather compact, entirely grayish pollinose, nowhere shining, 

 length 6 mm. Head hemispherical, slightly wider than thorax, sides of 

 front grayish pollinose, clothed with rather long fine erect hairs, orbits 

 narrowly edged with silvery. Antennae yellow, the outer side of third 

 antennal joint brownish, same slightly longer than second joint (fig. 1-a). 

 Arista brown, naked second joint not longer than broad. Genae, posterior 

 orbits and facial depression silvery pollinose. Frontal vitta brown, very 

 narrow at vertex, widening at base of antenna?. All the macrochaetae of 

 the head weak. Beard short and grayish in color proboscis and palpi yel- 

 low. Orbital bristles absent. Thorax and scutellum concolorous dark 

 grayish pollinose. Four distinct vittse, the inner pair narrow and becom- 

 ing obsolete near middle of dorsum, the outer pair reduced to triangular 

 spots before the suture and short narrow streaks posterior thereto. Post- 

 sutural dorso-central bristles three, sternopleurals two, which are scarcely 

 distinguishable from the long pilose hairs surrounding them. Pleurae 

 cinereous pollinose. Abdomen ovate, cinereous pollinose, a dark circular 

 spot surrounding each marginal abdominal macrochseta. All segments 

 bearing marginals, no discal on any segment. Abdominal vestiture con- 

 sisting of scattered coarse black recumbent hairs. Wings milky hyaline, 

 veins yellowish. Legs, including coxa?, yellowish, the femora brownish 

 on sides. Pulvilli whitish front ones as long as last tarsal joint, claws 

 not greatly elongated. 



Female. Similar to male except as noted in the generic description and 

 as follows, two pairs or orbital bristles present, frontal vitta occupying 

 nearly one-third width of front. Antennas entirely yellow, third joint, 

 about one and one-half as long as second. Pollen of superior orbit and 

 front with a yellow tinge, posterior orbit about twice as wide as in male. 

 Postvertical bristles well developed, nearly as long as ocellars. Abdomen 

 missing in the unique specimen as are the legs with the exception of one 

 front femur which is clear yellow in color. Pleura- whitish pollinose, 

 sternopleural plate almost naked, excepting the two sternopleural 

 macrochsotse. 



