1874.] 283 [Uhler. 



subequal to the third, the second shorter and more slender, fourth 

 fusiform, as long as the second and third conjoined. Under surface 

 of head polished, steel blue, coarsely, very remotely punctate ; ros- 

 trum reaching to the base of the venter, the fourth joint nearly as 

 long as the second and third united; bucculae narrow, as long as the 

 head, sinuated before the middle. Eyes acutely truncated behind, 

 not let into the front margin of the pronotum, but projecting a little 

 beyond the angle. Pronotum short and wide, depressed, the trans- 

 verse curve at the base much more convex than the curve from the 

 base forwards, the disk more coarsely punctate than the sides and an- 

 terior and posterior submargins ; lateral submargins broadly de- 

 pressed, and with a broad transverse depression posterior to each 

 callosity ; the lateral margins very broadly curved, with the edge re- 

 curved, the anterior angles bluntly rounded; the latero-posterior 

 margins broadly curved and not forming a triangle with the posterior 

 margin; humeri very prominent. Middle line obsoletely carinated; 

 on each side of.it is a long-elliptical rufous spot, and nearer to the 

 humeri is an oval spot of the same color. Scutellum high, the pos- 

 terior downward slant being longer than the basal surface ; on each 

 side behind the basal fossse is a large, rounded rufous spot; lateral 

 edge posteriorly a little recurved, the apex subacutely rounded ; the 

 posterior surface minutely, remotely, and obsoletely punctate. Legs 

 blue-black, obsoletely rugulose. Underside steel-blue, highly polished; 

 pectus coarsely, remotely, deeply punctured ; venter minutely rugu- 

 lose, remotely, deeply and distinctly punctate on the sides, but im- 

 punctate on the disk. 



Length, 10 mm. ; width of pronotum, 5^ mm., and length 2| mm. 

 One male, from west of the Huallaja River in Peru. 



Pentatomidje. 



Oplomus tripustulatus Fabr., Syst. Rhyng., p. 172, No. 91. 



A single specimen of the steel-blue variety, having a large curved, 

 yellow spot each side anteriorly upon the pronotum, and the basal 

 spine and an arcuated band upon the posterior segment of the ven- 

 ter. From Peru. 



Arvelius albopunctatus De Geer, Memoires, vol. in, p. 331, 

 pi. 5, fig. 6. 



A very large female, from the region west of the Huallaja River 

 in Peru. 



