OF WASHINGTON. 71 



twice as long as the third, gradually thickening towards the apex; 

 third joint equally thick; last joint fusiform, pale at tip; all the joints 

 minutely granulate and a few scattered granules of a whitish color 

 appear. Pronotum twice as broad as long; lateral margins strongly 

 and broadly reflexed near the middle, anteriorly deeply sinuate, pos 

 teriorly rounded, then nearly rectangular next to the humeri, with a 

 narrow yellowish edge; humeral flaps somewhat depressed; edge of 

 lateral margins minutely dentate ; anterior margin straight, narrowly 

 carinate; posterior margin almost truncate; the frontal disk carries 

 longitudinal prominently raised lines, the inner two approaching each 

 other at the anterior margin, the others interrupted by the callosities, 

 which are defined only feebly; the surface of pronotum is finely granu 

 late, especially on the posterior part, in transverse rows. Scutellum 

 cordate, having the margin strongly raised and the surface before 

 the middle slightly tumid. Hemelytra long, with the membrane dull 

 black and broadly rounded at the end; corium a little sinuate on 

 the outer sides and the basal part only feebly dilated and reflexed, the 

 apex reaching beyond the base of the fourth abdominal segment at the 

 connexivum. Abdomen gradually rounded towards back of the middle, 

 where it is widest; the upper side of abdomen blackish-brown, the 

 posterior segmental margins somewhat elevated on the connexivum, and 

 externally at their angles near the incisures is a small ochraceous spot; 

 the inner margin of the female genital lobes is also' edged with 

 ochraceous ; underside of abdomen at the venter flat, near the sides 

 much compressed and marked with reddish brown; venter narrowly 

 keeled throughout the middle. Posterior margin of the fifth ventral 

 segment trisinuate; the sixth feebly incised at the middle, longer than 

 the first genital segment, which is nearly thrice the length of the 

 second ; the genital lobes, seen from below, . rather long, converging, 

 but considerably apart from each other; the outer margins straight, a 

 little knobbed in .the middle, the inner margins rounded and meeting 

 the outer angle of the second genital segment. 

 Length, 8 mm. ; width across abdomen, 3 mm. 



Two females, Washington State (Ulke) ; Seattle, Wash. 

 (Uhler). 



Type.Xo. 9868, U. S. National Museum. 



This species has a great resemblance to Aradus ampliatus 

 Uhl., but differs from it essentially in the shape of the female 

 genital lobes, which are much shorter in A. ampliatus, truncate 

 at apex, and only slightly incised in the middle ; furthermore, 

 the latter has a more robust body and the pronotal sides are not 

 sinuate anteriorly. Prof. P. R. Uhler has kindly presented 

 me with a specimen from his collection that bears the manu 

 script -name of A. compressns. In describing the species I 

 gladly adopt this name. 



