April, 1902.] North American Species of Athysanus. 
25 1 
ATHYSANUS CURTISII, FITCH. 
Atnblycephal us curtisii Fitch. Homop. N. Y. State Cab. p. 61. 1851. 
Jassus nervatus Prov. Nat. Can. IV. p. 373. 1S72. 
Deltocephalus curtisii Prov. Pet. Faune Ent. Can. III. p. 278, 1889. 
Athysanus curtisii Osb. and Ball. Proc. Ia. Acad. Sc. IV. p. 221 1897— Proc. Dav. Acad. Nat. 
Sc. VII p. 91, pi. V. fig. 1. 1898. 
Short and stout, greenish yellow, two large round black spots on vertex. 
Elytra fuscous with the uervures green. Length 3.5111m, width 1. 2111111. 
Vertex but little broader than a right angle, nearl)' twice as long on middle 
as against eye ; front ver)- broad above, triangularly narrowing to the parallel 
clypeus. Elytra broad and short, appendix small ; venation simple, slightly 
variable, central anteapical cell short, straight-margined. 
Color : vertex pale yellow with two large round black spots before the 
middle ; pronotum with the anterior half shiny black, the posterior half 
greenish yellow, sometimes narrowly margined with fuscous behind. Scu- 
tellum pale yellow, two fuscous points on the disc. Elytra fuscous, the mar- 
gins and all the nervures before the apical cells greenish yellow ; face pale 
yellow a branching spot on the apex, the margin of front below the e} T es and 
a median stripe down the clypeus fuscous, the two latter unite to form a 
Y-shaped figure. Below fuscous. 
Genitalia : female segment half longer than penultimate, the posterior 
margin slightly, roundingly emarginate either side a small, rounding median 
lobe ; male valve roundingly triangular, as long as the ultimate segment ; 
plates together equilolerall v triangular, their apices acute, margins sparsely 
fringed with hair. 
Habitat : Ontario Can., N. H., Yt., N. Y. , Pa., Ohio, Mich, and 
Iowa. The color pattern is quite constant and very distinct in our 
fauna, making this one of the easiest species to accurately deter- 
mine. 
ATHYSANUS BICOLOR VAN DUZEE. 
Athysanus bicolor Van D. Can. Ent. XXIV, p. 114. 1892. 
Deltocephalus virgulatus Uhl. Proc. Zoo. Soc, Lon. p. 78. 1S95. 
Athysanus bicolor Osb. and Ball. Proc. Ia. Acad. Sci. IV, p. 222. 1897 — Proc. Dav. Acad. Nat. 
Sc. VII. p. 91. pi. V, fig. 2, 1898. 
Somewhat resembling curtisii the head narrower ; female with two black 
spots on vertex and two stripes on elytra ; male with the apex of vertex all 
black and the apex of elytra black with an oblique light dash. Length, 9 
3.5mm, $ 3mm ; width, imm. 
Vertex about as long as its basal width, slightly- acutely conical, not quite 
twice as long on middle as against eye ; front inflated above, but little nar- 
rowing to the long clypeus ; pronotum strongly rounding in front with more 
than half of its length included within the long narrow eyes. Elytra rather 
short and broad, rounding behind with a very feeble appendix ; venation 
obscured, similar to curtisii. 
Color : vertex pale yellow, a pair of round black spots on anterior half, 
rarely confluent in female, coufluent and covering anterior half of vertex in 
