GEOLOGICAL SUEVEY OF THE TEREITORIES. 409 



Legs pale greenish, more or less embrowned on the tarsal joints and tip 

 of the tibiae; the femora with impressed, sometimes brownish, points in 

 series. Scutellum yellow, margined at base with black, minutely trans- 

 versely wrinkled, having a few obsolete punctures. Hemelytra longer 

 than the abdomen ; the corium pale yellowish, or with the disk dusky 

 and the margins yellovTish ; membrane whitish, with thenervule brown- 

 ish. Abdomen pale yellowish, the disk of the tergum more or less 

 brownish, or sometimes with black bands on the segments; venter usu- 

 ally having the lateral black lines very distinct. 



Length to tip of venter, 5-6 millimeters. Width across the humeri, 

 1^ millimeters. 



Inhabits Berthoud Pass and other parts of Colorado ; also Montana, 

 Cheyenne, &c. 



2. M. rtibiciinda. New species. — Eorm similar to M. dehilis ; rosy or 

 crimson-red. Head bald, x)ale, rosy, or yellowish, with a black dot 

 each side of the middle, between the eyes, and a broad, black stripe 

 each side, invaded by the eyes, which, running forward, curves down- 

 ward at the antennae and covers the tylus; throat blackish, Antennse 

 black, slender; the second joint a little longer than the head pronotum 

 and scutellum united, basal and apical joints subequal; the third joint a 

 little longer than the fourth. Rostrum pale yellow, reaching to the 

 third ventral segment; the apical joint piceous, excepting at the base. 

 Pronotum testaceous, tinged with rosy, irregularly punctured with 

 black; the middle line and sides pale; each side, near the anterior an- 

 gles, with a subquadrate black spot; the lateral margins feebly sinuated, 

 and the posterior angles broadly I'ouuded. Pectus yellow, with rosy 

 nebulse; the propleura remotely punctured and with a black spot ante- 

 riorly; meso- and metapleurse each with a large, long, black spot; 

 sternum, and sometimes a spot near the base of the coxae, black. Legs 

 pale 3^ellow, the femora dotted with dark brown, and with the spines 

 and tip of tibiae piceous ; tarsi dark piceous. Scutellum rosy, yellow at 

 tip, black at base, and with a red stripe along the middle. Hemelytra 

 rosy, obsoletely scabrous, remotely i3unctured, and with a few lines of 

 punctures near the sutures; the margins of corium and clavus and the 

 longitudidal nervures yellowish; membrane pale brown; the nervule 

 yellow, or sometimes reddish at base; wings faintly brown. Tergum 

 more or less blackish, at base reddish, and with the apical segment 

 yellow, except at the base; the connexivum yellow, defined inwardly by 

 a dark line; venter yelloAV, rosy on the sides, and with a red line along 

 the middle; the inferior connexivum yellow, bounded on the inner side 

 by a line of interrupted, impressed, slightly oblique, black streaks. 

 Bases of venter and anal segment sometimes blackish. 



Length to tip of venter, 4^-5 millimeters; width across the humeri, 

 1^-1| millimeters. 



Brought from Colorado. The amount of black on the head, &c.. varies 

 very considerably. 



TrigonotyluSf Fieber. 



T. ruficornis, Fallen; Herrich-Schf., (Wanz. Ins., 11, p. 119, Fig. 200.)— 

 Obtained at Snake Eiver, Idaho, and Colorado. It extends east as far 

 as Maryland and Massachusetts. In the latter State it abounds upon 

 the salt-marshes near the coast. 



Leptopterna, Fieber. 



L. ammna. New species. — Robust, pale yellowish ; head and antennas 

 stouter than in L. dolobrata, Linn., with the pronotum long, and narrower 



