April, 1902.] North American Species of Athysanus. 251 



ATHYSANUS CURTISII, FITCH. 



Aniblyccplialns cu) tiiii Fitch, Homop. N. Y. State Cab. p. 6r. iS.st. 

 Jassus nervatus Prov. Nat. Can. IV, p. 373, 1872. 

 Dcltocephalus curlisii Prov. Pet. Faune Ent. Can. Ill, p. 278. 18S9. 



Athysanus cuitisii Osb. and Ball, Proc. la. Acad. ,Sc. IV. p. 221. i897--Proc. Dav. Acad. Nat. 

 Sc. VII, p. 91, pi. V. fig. I. 1898. 



Short and stout, greenish yellow, two large round black spots on vertex. 

 Elytra fuscous with the nervures green. Length 3.5nim, width i.2nim. 



Vertex but little broader than a right angle, nearly twice as long on middle 

 as against eye ; front very broad above, triangularl)- narrowing to the parallel 

 clypeus. Elj'tra 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}'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 equilolerally triangular, their apices acute, margins sparsely 

 fringed with hair. 



Habitat : Ontario Can., N. H., Vt., N. Y., Pa., Ohio, Mich, and 

 Iowa. The color pattern i.s quite constant and very distinct in our 

 fauna, making this one of the easiest species to accurately deter- 

 mine. 



ATHYSANUS BICOLOR VAN DUZEE. 



Alliysaiius bicolor Van D. Can. Ent. XXIV, p. 114. 1892. 

 Deltocephahis virgulatus Uhl. Proc. Zoo. Soc, Lon. p. 78. 1S9.5. 



Athysanus bicolor O.sb. and Ball, Proc. la. Acad. Sci. IV. p. 222. 1897 — Proc. Dav. Acad. Nat. 

 Sc. VII, p. 91, pi. V, fig. 2, 189S. 



Somewhat resembling ciirtisii the head narrower ; female with two black 

 spots on vertex and two stripes on eh'tra ; 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 strongh' 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 



