476 PROCEEDINGS OF THE NATIONAL MUSEUM. vol 4?.. 



APHIOCHiETA IROQUOIANA, new species. 



Female. — Black, distinctly shining; frons shining, lower post- 

 antennal bristles about three-fourths as large as upper pair, arrange- 

 ment of bristles as in johannseni, antennae normal, arista pubescent, 

 short, about one-fourth longer than frons, palpi yellow, rather strongly 

 and numerously bristled; thorax shining, several additional bristles 

 on posterior margin, but they are rather weak, four nearly equal 

 scutellar bristles, the anterior pair being a little weaker than the 

 posterior pair; abdomen dull black, more shining towards the apex, 

 bristles on lateral margins of second segment small and indistinct; 

 legs piceous, fore coxae, fore legs, mid tibiae, and bases of mid and hind 

 femora yellowish, mid tibial bristles indistinct, those on hind tibiae 

 widely placed and weak, v.ery indistinct on basal third; wings gra3dsh, 

 costa short of middle, first division nearly three times as long as 

 second, third more than half as long as second, fringe long, fourth 

 vein leaving at rather beyond fork with a slight bend and running 

 nearly straight to much in front of wing tip, a distinct bristle at base 

 of third vein; halteres yellow. 



Length, \h, imn. 



One female, Ithaca, New York (O. A. Johannsen); one female, 

 Detroit, Michigan (no collector's name). No date on either. 



Type.— C&t. No. 14867, U.S.N.M. 



APmOCH^TA URSINA, new species. 



Male. — Very similar to the foregoing but larger; the bristles on 

 hind margin of thorax are not so numerous, in the specimen before me 

 only the dorso-centrals are present, and those are stronger than in 

 iroquoiana, the anterior pair of scutellar bristles are at least as strong 

 as the posterior pair; the lateral bristles on second segment are weak 

 and the sixth segment has several long hair-like preapical bristles; 

 the legs are piceous, the hind tibial setulse as in previous species; the 

 wings have the costa to near the middle, the first division about two 

 and one-half tunes the length of second, third nearly one-half second, 

 fringe longer than in iroquoiana, and the fourth vein as in that species. 

 I can not see any bristles at base of third vein, which is further from 

 the costa on distal half than in the previous species; halteres yellow* 



Length, If mm. 



Type.—Csit. No. 14868, U.S.N.M. 



One male, London Hill Mine, Bear Lake, British Columbia, July 

 29, 1903, altitude 7,000 feet. (R. P. Currie.) 



There is no doubt about this being distinct from the previous 

 species. Though the front of the head is in so bad condition that it 

 is impossible to say anything definite about the arrangement of 

 bristles, etc., there are sufficient differences to separate it from iro- 

 quoiana as a quite distinct species. 



