Dec, I902.] CoQUILLETT: NEW NoRTH AMERICAN DiPTERA. 187 



brownish, middle and hind femora without bristles, all tibiae with a preapical bristle ; 

 wings hyalme, vems yellow, costa bearing several short, black, spinous bristles, small 

 crossvein near middle of discal cell ; halteres yellow. Length, 2 mm. 



Habitat.— Los Angeles Co., California. 



Three specimens collected by the author. Type No. 6650, U. S. 

 N. M.* 

 Pseudodinia, gen. nov. 



Near Parodinia but the vibrissa; wanting, the front wholly polished, etc. Head 

 somewhat hemispherical, front but slightly convex and with a broad, transverse 

 groove below the middle, the portion below the ocelli broad-er than long, bristles as 

 in the preceding genus, antennae projecting obliquely downward, less than one third 

 as long as the head, the third joint orbicular, slightly longer than the second, arista 

 bare, face concave, sides of oral opening bearing short hairs, eyes bare, oblique, 

 nearly quadangular, with rounded corners ; proboscis short and robust, the labella 

 rather narrow ; palpi nearly cylindrical ; auxiliary vein indistinct, extending close to 

 the first until near the apex, then separating and ending in the costa, costal vein 

 extended to apex of fourth, not incised, hind crossvein transverse, sixth vein oblit- 

 erated slightly beyond apex of anal cell, the latter and second basal complete, small ; 

 tibiae bare. 



Type, the following species : 

 Pseudodinia varipes, sp. nov. 



Black, the proboscis, halteres, tarsi and apices of tibire yellow ; thorax sub- 

 opaque, thinly gray pruinose, two pairs of dorsocentral bristles, the hairs between 

 them not in rows, four supra-alar bristles, one humeral two posthumeral, one near 

 middle of hind edge of mesopleura and one sternopleural, a few hairs in front of the 

 latter, pleura otherwise without hairs, scutellum bearing four bristles ; wings hyalme, 

 veins'yellowish, changing to brown on the apical portion, second, third and fourth 

 veins nearly parallel, the apices of the third and fourth diverging, last section of 

 fifth vein less than half as long as the preceding section, small crossvein near middle 

 of discal cell. Length, 1.5 mm. 



Habitat.— \.-&.s Vegas Hot Springs, New Mexico. 



Three specimens collected August 3, 8 and 15, by Mr. H. S. 

 Barber. Type No. 6651, U. S. N. M. 



Milichia robertsoni, sp. nov. 



Black including the halteres ; the front angles of third abdominal segment, a 

 fascia at base of the fourth and whole of the fifth except its apex, silvery white 

 pruinose, wings hyaline, costal incision small. Length, 2 mm. 



Habitat. — Inverness, Florida. 



^Rhicrtassa costalis Co'qdile^^^belongs to Parodinia. It was described from 

 the Galopagos Islands and Mr. Barber collected specimens at Williams, FlagstaH and 

 Bright Angel, Arizona. 



