HENRY J. FRANKLIN. 457 



its middle. Malar space shorter than its width at the apex, about 

 one-fourth as long as the eye. Clypeus with its anterior portion 

 sparsely punctate in the middle, the remainder being coarsely and 

 densely punctate. Flagellum of antenna nearly one and four-fifths 

 times as long as the scape ; third and fifth antennal segments subequal 

 in length, the fourth much shorter than either. 



Thorax. — Dorsum yellow, usually with a distinct, though often 

 poorly defined, black band between the bases of the wings ; sometimes 

 all yellow, except for a large black spot on the disc. Mesopleura 

 covered with yellow pile to, or nearly to, the bases of the legs ; meta- 

 pleura very often entirely dark, but usually with considerable yellow 

 pile ; sides of the median segment and metanotum usually entirely 

 dark, but sometimes with some yellow pile. 



Abdomen. -Tergum: segment one usually entirely dark, but occasion- 

 ally with a touch of yellow on its anterior corners, or even on its mid- 

 dle portion ; segment two usually entirely dark, but often with more 

 or less yellow pile on the sides of its hind border ; segment three black 

 in the middle, the sides being entirely covered with yellow pile, or at 

 least with yellow on their hind portions ; segments four and five usu- 

 ally dark in the middle and with yellow pile on the sides, the latter, 

 however, sometimes entirely or almost entirely dark. Segment six 

 dark, but usually with ferruginous pubescence running back from the 

 apex considerably on each side. Venter dark, but with considerable 

 brownish-ferruginous pubescence on the apical portion of the apical 

 segment. Lateral carinas of hypopygium much less elevated, and with 

 their front portions more rounded, than those of latitarsuSy their hind 

 portions distinctly and somewhat suddenly lower than their front 

 portions. 



Wings. — Moderately stained with brown ; the fore pair usually dark- 

 est in the region beyond the veins. 



Legs. — Dark. Sarothri about three times as long as their greatest 

 breadth, their posterior margins nearly straight. 



Dimensions. — Female : length, 13| mm. to 18 mm. ; spread of wings, 

 32 mm. to 38 mm. ; width of abdomen at second segment, 7 mm. to 9 

 mm. 



Redescribed from many specimens. 



Habitat. — I have records of this species as follows : New- 

 Mexico (Beulah and Cloudcroft), Utah, Colorado, Oregon, 

 Montana (Missoula, Gallatin County, Ravalli County, Big 

 Fork, Bozeman, Bridger Caiion, Sedan), Washington (Pull- 

 man), New York (Ithaca, two specimens), New Hampshire 

 (one specimen), British Columbia (Vancouver, Glacier and 

 Kaslo), Alberta (Mt. Edith) and Quebec (Saguenay River, 

 three specimens). I also have a somewhat uncertain record 



TRANS. AM. ENT. SOC. , XXXVIII. (58) 



