488 PROCEEDINGS OF THE ACADEMY OF [DeC, 



5. Oliarus complectus Ball. 



This small .species has much the aspect of CEcleus dcccns Stal, ])ut the 

 vertex narrows anteriorly not posteriorly as in (Ecleus, and the hind 

 edge is angularly emarginate. In complectus the intermediate meso- 

 notal carinse are almost obsolete in some specimens. I have taken 

 this species at Effingham, Kansas, Washington, D. C, Niagara Falls and 

 at other localities about Buffalo. The eastern specimens differ from 

 those from Kansas in having the wings quite strongly infuscated 

 toward their apex, but the genital and other characters seem to be sub- 

 stantially the same. This is the only species known to me in which 

 the frontal ocellus is represented only by a scar. 



6. Oliarus cinnamomeus Prov. 



This is very distinct from any other species known to me. It can 

 at once be distinguished by its fuscous elytra with the slender costa 

 and the stigma whitish. Provancher's type came from Vancouver 

 Island ; Mrs. Slosson has taken it in the White Mountains, and Prof. 

 W. E. Britton has sent me three examples taken at Colbrooke, Con- 

 necticut. It seems to be a rare and local northern form. 



7. Oliarus humilis Say. 



This our most abundant northern species is sufficiently distinct from 

 any other. It varies considerably in size and depth of coloring. 



Genus CIXIUS Latr. 



Elytra black or nearly so ; commissural margin and the costa slenderly 

 pale; body black above with a broad pale vitta covering the 

 vertex and middle line of the pro- and mesonotum, 



dorsalis ^^an D. 



Elytra hyaline or slightly enfumed, frequently more or less banded or 

 maculated with fuscous; nervures with brown punctures, . 1. 



1. A'ertex distinctly transverse, at most obtusely angled before; 



elytra proportionately broader; outer sector of the corium 

 forked as near to or nearer the base than is the inner; macula- 



tion transverse, 2. 



— . Vertex a little longer than broad, triangular, its apex subacute; 

 elytra proportionately narrower; outer sector of the corium 

 forked farther from the base than is the inner; maculation 

 longitudinal, cuUns Ball. 



2. Vertex broad triangular, obtuse or subacute before, its apex very 



nearly attaining the apex of the front and almost bisecting the 

 transverse compartment at the apex of the head; front black 

 with the carinse pale; plates and stiles of the male about equal- 

 ling the pygofers, stigmatus Say. 



— . Vertex short, transverse, rounded before; transverse compart- 

 ment at the apex of the head much less narrowed, divided by a 

 median carina, 3. 



