DIPTERA 



449 



Sitka, Alaska : A male specimen, collected June 1 6. The type lo- 

 cality of this species is Colorado. 



Hylemyia linearis Stein. 



Hyhmyia linearis Stein, Berliner Ent. Zeitsch., p. 219, 1898. 



Kukak Bay, Alaska: Two male specimens, collected July 4. 

 This species was originally described from Minnesota. 



Hylemyia spiniventris sp. nov. 



Male: Black, the halteres yellow ; frontal vitta at narrowest part 

 slightly wider than the lowest ocellus, antennae about five-sixths as 

 long as the face, the third joint only slightly longer than the second, 

 longest hairs of arista almost twice as long as greatest diameter of the 

 arista, proboscis slightly longer than height of head, very slender, the 

 labella very small; mesonotum slightly polished, two median vittae 

 in front of the suture, the lateral margins in front of the wings, and 

 the pleura, grayish pruinose, three pairs of postsutural dorsocentral 

 bristles, sternopleurals i -f- 2 ; abdomen somewhat depressed, almost 

 linear, subopaque, yellowish gray pruinose and with darker, olivaceous 

 reflecting spots, hairs of venter becoming gradually longer toward its 

 apex, the plate on the fifth ventral segment beset along each outer 

 edge with about eight stout, rather short, inwardly curving spines, near 

 the apex of the plate with a transverse pair of clusters of rather long 

 bristles and hairs; front tibiae each bearing two bristles below the 

 middle of the posterior side and with three below middle of outer 

 side; middle femora ciliate with bristles along the anterior-under and 

 posterior-under sides, middle tibiae each bearing two bristles on the 

 outer-anterior side, three on the posterior-outer side, and two or three 

 on the inner-posterior side, all on about the median third of the tibia ; 

 hind femora sparsely ciliate with long bristles on the anterior-under 

 side and basal half of the posterior-under side, the apical half of the 

 latter side ciliate with short bristles ; hind tibiae each bearing three 

 bristles on the inner-anterior side, four on the outer-anterior side, five 

 on the outer-posterior side, and about four short ones on the basal half 

 of the posterior side ; wings dark brown at base, the remainder pale 

 brown, changing into grayish hyaline along the hind margin, costal 

 vein distinctly spined to apex of first vein, costal spine slightly longer 

 than the small crossvein, hind crossvein strongly sinuate, calypteres 

 yellow. 



Female : Front at narrowest point almost one and one-half times as 

 wide as either eye, a pair of cruciate prteocellar bristles; mesonotum 

 opaque yellowish gray pruinose, marked with five indistinct brown 



