216 THE CANADIAN ENTOMOLOGIST. 



females. In one specimen there are cross-veins connecting the upper 

 branch of the third longitudinal with the second, thus forming three dis- 

 tinct submarginal cells as in Exoprosopa. In the other specimen they are 

 entirely wanting, nor are there any rudiments. Again, in the first the 

 second submarginal cell in the wing is intersected by a cross-vein running 

 into the margin, and also a stump in the first submarginal before the fur- 

 cation. In the other specimen they are entirely wanting. 



Here we have two specimens which can not possibly be separated, of 

 which one might be referred to Exoprosopa of the fascipennis group, and 

 the other to Anthrax ! I have also another undescribed species of this 

 group from the West, with a stump of a cross-vein nearly dividing the 

 first submarginal, and the third posterior cell bisected as in halcyon. These 

 veins are evidently all spurious, but one can readily understand how 

 natural selection has caused such to become persistent, thus constituting 

 not only new species, but, as we understand them, new genera. 



I append a description of the former species, that attention may be 

 called to it. 



Anthrax, sp. nov., near fuliginosa Lw. 



Face yellow with yellow pile, black on the oral margin in front \ front 

 and two joints of the antennas of the same color (the third wanting) ; the 

 former with black hairs above, and the latter with black pile. Proboscis 

 black. Thorax black with fulvous pile above, evidently ; pleurae with 

 whitish hairs. Scutellum reddish, black at base. Ground color of abdo- 

 men black ; second, third and fourth segments with large oval reddish 

 spots on the sides ; fifth and sixth reddish on the sides, seventh wholly 

 so. Tomentum reddish. Sides of segments with black and white hairs. 

 Venter yellow. Legs luteous, tips of anterior tibiae and all the tarsi infus- 

 cated. Wings brown with the following hyaline spots : End of first sub- 

 marginal and nearly all of second submarginal cells ; the latter part of 

 the intervening vein strongly clouded, as are all the others except between 

 the discal and third posterior cells ; second, third and fourth posterior 

 cells ; the larger part of the discal cell ; and opposite it the inner part 

 of the third posterior with a second spot. Also dimmer spots in the 

 second basal cell and anal angle. Third posterior with a stump of a 

 vein. Length 10 mm. From G. B. Grinnell. 



