April, 1902.] North American Species of Athysanus. 237 



CC. Vertex more rounding, distinctly less than twice as long on 

 middle as against eye, shorter than pronotum. 

 D. Vertex unmarked, or with round spots ; front broad- 

 est at base ; elytra shorter than the abdomen in the 

 female, the cross nervure not broadened. 



obsoletus Kirsch. 

 DD. Vertex with transverse bands, front bounded above 

 by a cordate line, narrow, the margins parallel half 

 its length ; elj'tra long and narrow, the cross nerv- 

 ure in a broad white spot. varus Ball. 

 BB. Black, smaller and narrower, rarely dark brownish fuscous with 

 light nervures but no broad light spot on the cross nervure. 

 C. Vertex distinctly angular, the margins straight, nearly twice 

 as long on middle as against eye ; a yellow band at base 

 of vertex and usually the nervures yellow. 



plutonius Uhl. 

 CC. Vertex rounding, but slightly conically pointed, but little 

 longer on middle than at eye. Shining black, elytra cori- 

 aceous, anthracinus Van D. 

 AA. Species smaller and usually more elongate. Elytra usually longer than 

 abdomen, rounding posteriorly, the central anteapical cell constricted 

 in the middle, its apex produced as far beyond the adjacent cells as 

 its middle wiilth. Color brownish or fulvous. 

 B. Elytra distinctly longer than body, form long and narrow. Fe- 

 males over four mm. in length. 

 C. Pale testaceous, the vertex fulvous; face and below includ- 

 ing legs pale testaceous. syiuphoricarpac Ball. 

 CC. Testaceous brown or brownish, transverse fuscous marking 

 on vertex and pronotum ; face and below fuscous or black, 

 the legs partly lighter. 

 D. Elytra pale, testaceous or cinereous, the nervures nar- 

 rowl}- light, sometimes narrowly margined with 

 fuscous, anterior and middle legs with the tibiae 

 and the tips of the femora orange, rest of femora 

 shining black. vaccinii Van D. 

 DD. Elytra with nervures almost white, the cross nervures 

 broadly light. All nervures broadly, heavily fus- 

 cous margined, leaving only small stripes or spots 

 of light in the center of the cells; anterior and 

 , middle femora and usually tibiae with alternate 



light and dark rings. sfriaiuius Fall. 



BB. Elytra only equaling the body in length, or slightly longer in the 

 males. Form short and stout ; species smaller, less than 4mm 

 in length. 

 C. Vertex with a definite transverse band between the anterior 

 margins of the eyes ; species over 3 mm in length. Front 

 broad, distinctly wedge-shaped. arctostaphyli Ball. 

 CC. Vertex with markings very faint, no transverse band be- 

 tween anterior portion of eyes. Species 3nim or less in 

 length. Front narrow, almost parallel margined. 



dentatus O. and B. 



ATHVSANUS EXTRUSUS VAN DUZEE. 



Athysanus extinsus\2^\\ D. Can. Ent. XXV, p. 2S3, 1893. 



A//i}saniis e:v/i iisiis Osh. and Ball. Proc. Dav. Acad.. N. S. VII, p. 92, PI. VI, Fig. i. 1896. 



Larger and .stouter built than obsoletus and with a longer vertex. Dirty 

 straw-yellow, washed and marked with fuscous, usually four triangular, dark 

 spots on vertex. Length, 9 5-2 mm., $ 4.2 mm.; width 2 mm. 



