66 THE CANADIAN ENTOMOLOGIST 



the thorax with faint white pubescence. Facial projection extremely short, 

 about as in Melander's figure of N. hruesl, but not blunt at tip, and the antennae 

 plainly at base of the projection; discal cell with upper side distinct. 



In Melander's table it runs to A^. ravhoiuirius, which has a xcvy much larger 

 facial projection. 



Length 3 mm. 



From Chesapeake Beach, Ind., 9 July, also Bayville, N.Y., and Nahant, 

 Mass., (Agassiz). Evidently a costal species. 



Stenopogon (Scleropogon) uhleri, sp. nov. 



Clothed with grayish pubescence and white hair and bristles; antenna; 

 black, wings hyaline, abdomen obscure, tips of segments paler, legs dark, some 

 reddish on front and middle femora. Wings with first and fourth posterior 

 cells closed and petiolate; hypopleura with white hairs, sternopleura with 

 short fine hair. Male ventral plate divided at tip and the lobes divergent; the 

 intermediate appendages have the inner black hooks as in 5. similis, but when 

 seen from the side do not have a black process at the lower corner, seen in .S. 

 siniilis. 



Length 2.3 mm. 



From the hills west of Denver, 18 Aug., (P. R. IJhler). Differs from S- 

 similis and 5. pumilus, which are of the same general appearance, by having 

 the lobes of the ventral plate longer and divergent. 



Atomosia antennata, sp, nov. 



Head black, thorax metallic bluish, abdomen metallic greenish, \enter 

 brown, legs with the femora pale reddish or yellowish, tibia dark brown, tarsi 

 lighter brown, palpi pale, antenna; dark, second joint yellowish, wings nearly 

 hyaline, pleura with two or three patches of silvery pubescence. Face clothed 

 with whitish pubescence and white hair, thorax and abdomen with very short 

 pale hair, legs with longer white hair. Ocellar tubercle with two bristles; first 

 joint of antenna a little more than twice as long as the second, which is rather 

 shorter than usual, third not twice as long as first and second together; end of 

 discal cell curves out a little from the end of the fourth posterior cell. 



Length 5 mm. 



From Douglas, Arizona, August, (L. H. Snow). Distinct from all our 

 other species by colour of second antennal joint, as well as by the metallic 

 colour of thorax and abdomen. 



Nicocles utahensis, n. sp. 



9 Structurally similar to N. aemidator Lw., the bristles on the scutellum 

 and thorax as in that species. It is, however, black in colour with white hair 

 and pile, instead of the brown hair and somewhat yellowish pile of N.aemulator. 

 The dorsum of thorax beside the middle geminate dark stripe has also short 

 lateral dark stripe in front; the legs are entirely black (without the red seen in 

 N. aemulator) ; the abdomen is very similar to the female of that species, with 

 pollinose white spots, but those on the fifth segment are triangular and smaller 

 than in TV. cemulator. The wings are marked on the same plan, but the marks 

 follow the longitudinal veins, and there is no tendency to form dark clouds 



