1909] American species of Scolioneurinae 263 



Species of Parabates. 



a. Vertical portion of the antennal furrows punctiform, only slightly longer 



than wide histrionicus n. sp. 



aa. Vertical portion of the antennal furrow not punctiform, extending from the 

 occiput to beyond the lateral ocelli inspiratus n. sp. 



Parabates histrionicus 11. sp. 



Body black with the knees, the front and middle tibiae and their 

 tarsi, and the posterior tibiae and metatarsi, white or infuscated; 

 the antennal furrows deep above and below, interrupted on the middle 

 of the front, the lower ends connecting with a broad, deep antennal 

 fovea, extending to opposite the middle of the median fovea, inter- 

 rupted by a transverse ridge not completely filling the furrow, the 

 furrow punctiform above the ridge, longer than broad, the vertical 

 portion punctiform, not extending beyond the lateral ocelli, slightly 

 longer than wide; the postocular area very wide and very short, de- 

 pressed below the area in front of the interocellar furrow; the interocel- 

 lar furrow faint; the middle of the front uniformly convex, the ocellar 

 basin practically wanting, a slight depression around the median 

 ocellus and connected with the interocellar furrow by a very fine 

 furrow; the median fovea deep, with broadly inclined sides, longer than 

 broad; the supraclypeal area strongly elevated between the antennae, 

 ridge-like, uniformly convex below the median fovea; the antennae 

 slender, the first and second segments globular, subequal in length, 

 together slightly longer than the third segment, the third as long as 

 the fourth and fifth together, the fourth and following segments sub- 

 equal in length, the ninth segment gradually narrowed toward the 

 apex, pointed on one side, the fourth and following segments slightly 

 serrate on one side, all the segments densely hairy; the clypeus trun- 

 cate at apex; the wings shghtly infuscated, the veins and the costa 

 black, the stigma except on its front margin brownish, a fuscous band 

 between the tip of the third anal vein and the base of the cell 1st A-(- 

 2nd. 2nd. A.; front wings with the free part of R^ three times as long 

 as the free part of R,; the stigma broadly rounded below, truncate at 

 apex, twice as long as wide, broadest before the middle; the posterior 

 metatarsus shorter than all the following segments together, the sec- 

 ond segment twice as long as the third ; the saw-guides straight on the 

 upper margin, convex below, obHquely, convexly truncated at apex, 

 with a blunt point at its upper angle, the surface polished, the apex 

 and the lower margin fringed with setae longer than the width of the 

 saw-guides. Length o mm. 



Habitat. — Olympia, Washington (Trevor Kincaid) ; Colorado 

 (C. F. Baker) ; and Nevada. Type in the collections of Cornell 

 University and paratypes in the collections of the U. S. National 

 Museum. 



