242 A. L. MELANDER. 



ties besides the two moderately large marginal ones. Mesonotum with traces of 

 two black vittse ; pleurae, pectus and coxae coated with white dust, coxal and 

 metapleural bunch of hairs yellow, prominent. Abdomen cinereous, olivaceous 

 brown above; hypopygium small, slender, completely reflexed, the terminal 

 heel robust. Legs slender, black, the femora black-spinose beneath apically, of 

 the male the front femora have the lower surface provided with pale cilia near 

 the base, no long bristles present; the male front tibiae are provided with a 

 double row of hairs on the under surface, the front row short, spine-like, the hind 

 row consisting of fine and long hairs; pulvilli minute, empodium as long as the 

 claws. Wings long, slender, hyaline, with a faint infumation, the stigma faint, 

 narrow; veins black, the third vein strongest, the second submarginal cell long, 

 narrow ; discal cell very long, not pointed, the first section of its anterior border 

 nearly two-thirds the length of the second section and twice as long as the vein 

 between the second basal and discal cells, the posterior border three times the 

 length of the outward continuation of that vein ; anal and second basal cells 

 separately closed, of equal extent, anal vein evanescent. 



Numerous specimens. Juliaetta, Idaho (Prof. J. A. Aldrich). 

 This species apparently belongs to the division Roederia Mik. 



Cliiiocera conjiiiicla Loew. 

 Wien. Ent. Monatschr., iv, 80. 



Olivaceous, thorax with two black vittae, pleurae and coxae white-pollinose, 

 legs wholly black. Wings fusco-macalate; an obsolete spot between the third 

 and fourth veins behind the cross-vein, a second ascending from the third vein 

 to the fusco-cinereous stigma, a third uniting the basal part of the anterior 

 branch of the third vein with the cross-vein which connects it with the second, 

 a fourth including the veins which close the small and apically very oblique discal 

 cell, a fifth present on the last segment of the fourth vein. Halteres dull yel- 

 lowish. 4.5 mm. 



Washington, D. C. (Osten Sacken). 



Cliiiocera taos sp. nov. 

 Length 3 mm. — Black, occiput and sides of the mesonotum closely dull dark 

 olivaceous pollinose. Face bare, narrow below the antennae, the lower part 

 white-pollinose, constricted from the small cheeks. Antennae short, the basal 

 joints short, the arista a little longer than the antenna. Proboscis and the palpi 

 black. Occiput and pleurae olivaceous, becoming cinereous on the coxae, middle 

 of the mesonotum, scutellum, metanotum and abdomen. No acrostichals nor 

 intermediate bristles among the dorso-centrals; scutellum with only two bristles. 

 Legs slender, coxae with short spar.se golden-yellow hairs bunched together 

 apically; no long lateral apical femoral bristles; empodium, pulvilli and claws 

 subequal, minute. Knob of the halteres reddish. Wings moderate, infumated, 

 with three more or less interrupted darker cross-bands, the first including the 

 anterior cross-vein, another somewhat proximal to the posterior cross-vein, the 

 third passing through the abrupt base of the second submarginal cell ; veins with 

 a feeble trace of undulation, the anterior branch of the third vein connected 

 with the second vein ; discal cell moderately broad, the first section of its anterior 

 border one-half the length of the second section, the hind border one-third longer 



