April, 1902.] 
North American Species of Athysanus. 
237 
CC. Vertex more rounding, distinctly less than twice as long 011 
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. 
obsole/us Kirsch. 
DD. Vertex with transverse bands, front bounded above 
by a cordate line, narrow, the margins parallel half 
its length ; elytra 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. 
pluton ins 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 width. 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. symphoricarpae 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- 
rowly 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. striatulus 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 3mm or less in 
length. Front narrow, almost parallel margined. 
dentatus O. and B. 
ATHYSANUS EXTRUSUS VAN DUZEE. 
Athysanus extrusus Van D. Can. Fnt. XXV. p. 283. 1893. 
Athysanus extrusus Osb. and Ball. Proc. Dav. Acad.. N. S. VII. p. 92, PI. VI, Fig. 1. 1896. 
Larger and stouter built than obsolctus 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. 
