March. 1919] BRUES: XoRTH AMERICAN SeRPHID.1-:. 17 



The legs and antennae vary in some specimens and are often 

 lighter than in the type. 



Thirteen specimens from widely scattered localities on the Pa- 

 cific Coast. Type from Oroville, Wash., April i. Others from 

 Burton, Wash. (Aug. 19) ; Vashon, W^ash. (Aug. 18, 1910) ; China- 

 cum. Wash. (Aug. 2$, 1910) ; Colby, Wash.; Puget Sound, Wash.; 

 Berkeley. Calif. (Aug. 8, 1915) ; Muir Woods, Calif. (Aug. 7, 1915). 

 All but one were collected and sent me by Prof. A. L. Melander. 



This is a small species without any striking peculiarities, but 

 quite distinct as indicated in the key to species. 



Exallonyx grandis new species. (Fig. 21.) 



$. Length 8.5 mm. Black ; legs except middle and hind coxae ferrugi- 

 nous ; antennae fuscous, rufous at base ; middle coxae dark rufous, hind coxae 

 black, except at apex ; tegulae fulvous ; palpi brownish yellow. Head seen 

 from above as broad as long, very slightly narrowed behind the eyes ; tri- 

 angularly produced in front of the eyes. In lateral view the eyes are re- 

 moved from the posterior margin of the head by one and one half times their 

 width. Ocelli in a nearly equilateral triangle, as far from one another as 

 from the eye-margin. Eyes sparsely pilose. Malar space as long as the eye, 

 without trace of any furrow. Clypeus not separated from the face medially, 

 with very deep lateral foveas, anterior margin straight, with a linear impres- 

 sion along the margin and a lanceolate one just above this. Antennae of 

 equal thickness throughout the flagellum ; scape twice as long as thick ; first 

 joint of flagellum five times as long as thick; second three fourths as long; 

 following gradually growing shorter, last only about a fourth longer than the 

 penultimate. Thorax gradually narrowed in front ; posterior corners of pro- 

 thorax not tuberculate or swollen. Scutellar impression deep. Propodeum 

 long, its upper surface gradually curving down to tip, with a strong, com- 

 plete median carina, with a broad, smooth space on each side of the carina, 

 becoming narrower behind and somewhat tuberculate on the posterior third, 

 rugose-punctate laterally. Pro- and mesopleurae entirely smooth ; line of 

 punctures along hind margin of latter enlarged into short striae below the 

 middle. Metapleurae rugose-reticulate, with a small, smooth space above. 

 Petiole of abdomen over twice as long as thick, tubular, but strongly arcuate, 

 being bent up at each end ; entirely smooth both above and below ; second 

 segment at base with only a median stria which is as long as the petiole; 

 discal cicatrices oblique and lying close to the stria. Femora very stout; 

 longer spur of hind tibia one third as long as the metatarsus. Appendage or 

 tarsal claws of four anterior legs as long and about as stout as the claw. 

 Wings distinctly tinged with brown ; stigma narrow, small ; radial cell nearly 

 as long as the stigma ; the radial vein entering the costa at an angle of about 

 45 . Cubital and discoidal veins indicated as brown streaks: second section 

 of radius, and first to a less extent, prolonged as brown streaks into the disc 

 of the wing. 



