THE CANADIAN ENTOMOLOGIST, 179 



line of ochraceous scales with a very broad stripe of black ones on each 

 side, extending from the nape to the "bare space," bordered laterally by 

 ochraceous and black scales mixed, ochraceous scales predominating to 

 the lateral margin of the mesothorax ; near laterad of the "bare space" is 

 often a short dark stripe, extending only a little way cephalad from the 

 caiidad margin of the mesonotum, but in some specimens this is lacking, 

 or nearly so ; scutellum covered with ochraceous broad curved scales ; 

 metanotum very dark ; pleura very dark, mostly covered with flat pale 

 ochraceous scales. 



Abdomen covered with almost black scales and basal pale ochraceous 

 bands, which vary greatly, being usually broad, somewhat widened later- 

 ally as "lateral spots," but sometimes these basal bands are narrow ; the first 

 segment has pale scales apically and mostly in the median portion, and 

 sometimes the apical segment is mostly light-scaled ; venter mostly with 

 pale ochraceous scales, sometimes showing apical black bands, very 

 narrow on the median part, broader laterally.  ' 



Legs : Cox?e and trochanters mostly light-scaled ; femora all pale 

 basally and ventrally, dorsally darker toward the apex, but speckled with 

 ochraceous scales, light knee spot ; tibi?e dark, but some light scales 

 sprinkled through ; ist and 2nd tarsals also slightly speckled with 

 ochraceous scales, the remainder of the legs usually entirely dark-scaled ; 

 ungues heavy, uniserrate. 



Wings clear, brown-scaled, except at the very base, where the sub- 

 costa, at least, has, on many specimens, bright ochraceous scales. Cells 

 large; ist submarginal a little longer than 2nd posterior, and about 5^ 

 longer than its petiole, the bases nearly on a line ; root of the 3rd longi- 

 tudinal vein about as long as the mid cross-vein which it meets nearly in 

 a straight line ; posterior cross-vein about the same length as the mid and 

 its own length distant. 



Length, 10 mm., of which 3.5 is proboscis. 



Habitat. — Alaska. Taken June, July, August. 



The dark submedian thoracic stripes are nearly black, and do not 

 suggest in any way the brown markings of Currei, latavittaia ox pretans 

 nor do they resemble the brown stripes of Felt's absobrinus, of which Dr. 

 Felt kindly sent me specimens for comparison, and it seems likely it is 

 a new species. It occurs in great numbers, sometimes with an apparently 

 closely-related species, which, however, lacks thoracic markings, and is 

 most likely iiigripes (or impiger). So far this new species has never been 

 sent in with T. alaskacnsis Mihi, which has apparently a much more 

 restricted distribution. 



