444 COQUILLETT 



about four bristles on the median two-fourths of the anterior-inner 

 side, two or three on median third of the outer-anterior side, and 

 about five on the lower two-thirds of the outer-posterior side ; wings 

 hyaline, strongly tinged with yellow at the base. Length, 6 to 8 mm. 

 Thirty males and thirty-one females. 



Habitat. — Yakutat, June 21; Kukak Bay, July 4; Popof Island, 

 July 8 to 15; Kadiak, July 20; Saldovia, Alaska, July 21. 



Type. — Cat. no. 5244, U. S. National Museum. 



Lasiops frenata' (Holmgren.) 



Aricia frenata Holmgren, Ofversigt Vetans.-Akad. Forh. , p. 103, 1872. 



Muir Inlet, Alaska: A male specimen, collected June 12. Origi- 

 nally described from Greenland. 



Lasiops hirsutula (Zetterstedt). 



Anthomyza hirsutula Zetterstedt, Insecta Lapp., p. 673, 1840. 

 Aricia hirsutula Zetterstedt, Diptera Scand., iv, p, 1494, 1845. 



Popof Island, Alaska : Two male specimens, taken July 13 and 15. 

 A European species, not before reported as occurring on this Continent. 



Lasiops calvicrura sp. no v. 



IMale : Black, the halteres light yellow ; hairs of eyes rather long 

 and quite dense, frontal vitta at narrowest point narrower than the 

 lowest ocellus, antennte two-thirds as long as the face, the third joint 

 twice as long as the second, arista rather long pubescent, the longest 

 about equal to greatest diameter of the arista ; mesonotum polished, 

 two indistinct gray pruinose vittas in front of the suture, four pairs of 

 postsutural dorsocenti'al bristles, sternopleurals i -f- 2 ; abdomen less 

 than twice as long as broad, subelliptical, yellowish gray pruinose and 

 with darker, olivaceous reflecting spots, the greater part of the first 

 segment and a pair of indistinct, subtriangular spots on the second, 

 black, hypopygium projecting very slightly ; front tibiae destitute of 

 bristles, middle femora ciliate with bristles on the entire length of the 

 under side, their tibiae each bearing a bristle near the middle of the 

 anterior-outer side and with four on the median two-fourths of the 

 posterior-outer side ; hind femora ciliate the entire length of the an- 

 terior-under and posterior-under sides with bristles which become 

 gradually shorter toward each end of the femur ; hind tibiae short 

 pubescent, each bearing three bristles on about the median third of the 

 anterior-inner side and with four on the median two-fourths of the 

 anterior-outer side ; wings pale brownish, changing into grayish hyaline 

 along the hind margin and in the discal cell, third and fourth veins 

 diverging, hind crossvein slightly sinuous, costal spine not longer than 



