284 PROCEEDINGS OF THE ACADEMY OP 



HUECHYS Amyot et Serv. 

 H. sangcinea, De Geer, Mem. Ins. iii. 221, pi. 33 ; fig. 17. Hong Kong. 



CENTROTUS Fab. 



Fragments of a species belonging to this genus, perhaps C. taurus, Fab., 

 were contained in the lot from Hong Kong, but they were too incomplete to 

 distinguish the species with certainty. 



CERCOPIS Fab. 



1. C. heros, Fab. Syst. Rhyng. 89,3. Hong Kong, China. 



2. C. bimacula, Walker, Brit. Mus. Cat. Homopt. 656, 25. Hong Kong, 

 China. 



Descriptions of four species of HEMIPTERA collected by the North-Western 



Boundary Survey. 



BY P. R. UHLER. 



Suborder HETEROPTERA. 



CORIZUS Fieb. 



C. borealis. Pale fuscous, clothed with whitish hair ; head narrow, eyes 

 but little prominent, basal joint of the antennae with a black spot beneath, 

 and pointed above with black, as are also the two following joints, apical joint 

 thicker, about equal in length to the preceding joint, dusky ; a black arcuated 

 spot between the ocelli and eyes, and a spot of the same color upon the ocelli ; 

 rostrum yellow, with a black longitudinal line ; thorax coarsely, confluently 

 punctured, the pectus with a spot, and an arcuated line behind the eyes, 

 black, anterior margin of the prothorax blackish, lateral margins slightly 

 sinuated before the middle, scutellum coarsely punctured, dusky at base, a 

 longitudinal line at the base and the lateral margins smooth, yellowish, the 

 apex with a rounded concave impression ; corium semitransparent, pale yellow- 

 ish, with a few small dots upon the longitudinal nerves, and two geminate, 

 confluent spots at the anastomosis, black ; principal nervures of the wings 

 black ; tergum black, finely, closely punctured, the last segment yellow, with 

 a longitudinal spindle-shaped black mark upon the middle, and three sub- 

 sutural ones each side, penultimate segment with a subtriangular, yellow spot 

 each side, the antepenultimate segment with an oblong, yellow spot upon the 

 middle, connexivuni with a subquadrate black spot upon each segment, which 

 are also seen beneath ; venter with two somewhat approximate, black points, 

 each side of the middle, upon the three discoidal segments, basal middle of the 

 last segment with an obscure black point ; legs pointed with black, the points 

 confluent upon the posterior femora, forming a black patch, apices of the tarsal 

 joints and the nails black. 



Length 8 millims. Humeral breadth 2J millims. 



A single female was collected by the expedition, east of Fort Colville. I 

 have also examined specimens obtained by Mr. Kennicott, in Arctic America. 



CORIXA Geoff. 



C. vdlnerata. Blackish fuscous, upper surface uniformly rostrated ; front 

 convex, hardly prominent, mouth dusky, eyes triangular, reddish brown, face 

 with very long golden yellow hairs, vertex with four longitudinal rows of large 

 punctures, occiput lightly carinated, acutely produced in the middle ; pro- 

 thorax obtusely rounded posteriorly, yellow, with seven black lines, two of 

 them forked, posterior ones a little curved ; lines of the clavus yellow, basal 



[Sept. 



