448 BULLETIN UNITED STATES GEOLOGICAL SURVEY. 



distinctly arched at base ; the lower margin of the clypens callous, 

 feebly recurved, testaceous, black in the center; tylua and labrum form- 

 ing an arched bridge, dull ocherous, the former a little concave on the 

 sides inferiorly, the latter piceous at tip and a little pubescent. Eostrum 

 reaching upon the intermediate coxfe,dark: piceous, paler at tip. Anten- 

 nsB moderately stout, clothed with pale, stiff hairs; basal joint dull 

 yellow, black beneath ; second piceous, paler at base and tip, not twice as 

 long as the basal one, and a little thickened at tip ; third and fourth dull 

 blackish, subfusiform, subequal, each longer than the basal one. Pro- 

 notum transverse, subtrapezoidal, rather flat, with the sides very ob- 

 lique, hardly curving; the submargin broadly depressed and gradually 

 narrowing toward the front ; the callosities feebly elevated, deeply and 

 broadly foveate in the center, bounded by a deeply impressed line ; the 

 surface minutely and densely rugulose ; posterior margin very slightly 

 concave, with the humeral angles moderately produced, very broad, and 

 with a large, low fold near the outer angle. Scntellum scabrous at 

 base, minutely, transversely wrinkled on the apical half; the central 

 impression lunate, distinct. Legs dull testaceous, very hairy, more or 

 less marked with piceous on the femora, particularly beneath, on the 

 tibisB, somewhat in spots, the tips, spines, and the basal and apical 

 joints of the tarsi piceous-black, the nails dull testaceous. Sternum 

 and under side of the body shining black, minutely, closely whitish 

 pubescent; the extreme edge of the prosternum and of the ventral seg- 

 ments and a broad end of the genital segment of the female whitish. 

 Heraelytra deep black ; the corium closely yellow and black pubescent, 

 densely shagreened, the costal margin moderately arcuated, broadly and 

 continuously flattened, recurved from the base to behind the middle ; 

 the costal area with a testaceous small spot behind the middle and two 

 smaller parallel ones near the tip, the middle nervure with a spot near 

 the base, and the middle areole with a larger spot at tip and two or 

 three smaller ones near the tip ; the clavus with a small yellow spot near 

 the tip ; membrane dull white, fuscous at base and with a broad cloud 

 at tip, a transverse series of oblong fuscous spots across the middle and 

 a spot at the tip of the exterior areole ; the nervures piceous or black. 



Length to tip of hemelytra 4-4J millimeters ; to tip of venter 3^-4 

 millimeters. Width of base of pronotum 1^ millimeters. 



A few" specimens from the Museum of Comparative Zoology, collected 

 in Cambridge, Mass. 



This is a robust little species, very closely related to S. inter sUtiaUs 

 Say, and perhaps only a variety of it. But the different shape of the 

 pronotum, with the other details, will at present serve to separate it. 



20. 8. elongata, new sp. 



Long-elliptical, narrower anteriorly, dull black, clothed above with 

 prostrate yellowish pubescence, and with a few erect black hairs on 

 the head and pronotum. Head dull black, front very oblique, long and 



