THE CANADIAN ENTOMOLOGIST. 19 1 



beyond the plates, their inner margins extending into a pair of narrow, 

 curved, black, style-like processes. 



Described from five males and five females swept from prairie grass 

 at Little Rock, Iowa, by the author. 



Deltocephalus missellus, n. sp. 



Form and general appearance of Say/, but smaller and lighter coloured, 

 resembling the European picturatus and flori, but readily separated by 

 the genitalia. Length 2.75-3 nim., width i mm. 



Vertex flat, right angled before, its length and basal width equal, one- 

 third longer on middle than against eye, slightly longer than pronotum ; 

 face as in Sayi, the front narrow, wedge-shaped, the lateral margins con- 

 tinuous with those of the clypeus ; pronotum over twice wider than long ; 

 elytra broad and short, broadly rounding behind, the apical cells little 

 longer than their apical width \ elytra shorter than the abdomen in the 

 female, longer in the male. 



Colour : pale cinereous washed with yellowish brown, the anterior half 

 of the vertex, except the lateral margin, brownish fuscous, divided into 

 four quadrants by a light cross, the anterior pair darkest on the oblique 

 margins ; pronotum irregularly marked with fuscous ; elytra pale cinere- 

 ous, the nervures whitish, irregularly margined with fuscous, the white 

 emphasized on all the transverse nervures ; face olive fuscous, short arcs 

 on the front, a median line on the lower half, a spot on the loras and the 

 margins of the clypeus and gente light ; below fuscous, legs light, anterior 

 femora annulate. 



Genitalia : female, ultimate ventral segment half longer than penul- 

 timate, the posterior margin slightly, roundingly produced in the middle 

 half, the apex nearly truncate ; male valve obtusely triangular, plates 

 broad at base, rapidly narrowing to the acute slightly divergent points, 

 not quite half longer than the valve, concealing the pygofers. 



Described from numerous specimens taken between Rist Canon 

 (6,000 feet) and the head waters of the Little Beaver (9,500 feet), one 

 specimen from each, Estes Park, Pinewood and Steamboat Springs, and 

 several from Marshall's Pass, all points being in the mountains of Colo. 

 Deltocephalus vinculatus, n. sp. 



Form and structure of signatifrons nearly, broader and more dis- 

 tinctly marked. Pale cinereous marked with rust brown and fuscous ; 

 two broad, transverse fuscous bands on the pale elytra. Length, $ 3.5 

 mm,, ^ 3 mm.; width 1.75 mm. 



