April, 1902.] North American Species of Athysanus. 
239 
about seven broad arcs on front omitting both basal and apical margins, the 
antennal sockets and sometimes a spot on margins of lorae fuscous. 
Genitalia : female segment half longer than the penultimate, the lateral 
angles rounded, the median third emarginate with a stout median process 
tipped with two divergent teeth, male valve as broad as the ultimate segment 
and about half as long ; plates triangular, slightly narrower than the valve, 
three times as long, together convex, their margins slightly concave ; 
pygofers compressed beneath the plates, the posterior angles triangularly 
produced, curved upwards, not extending beyond the plates. 
Habitat : Mountains of Colorado. 
ATHYSANUS OBSOLETUS KIRSCHBAUM. 
Athysanus obsolelus Kirschb. Die Athysanus Arten v. Wiesb., p. 7, 1S5S. 
Athysanus obsoletus Prow Pet. Faune Ent. Can. III. p. 281. 1SS9. 
Athysanus obsolelus Van D. Bull. Buff. Soc. Nat. Se. V, No. IV. p. 199. 1S94. 
Athysanus relativus Gill, and Baker. Hemip. Colo.. Bull. 31, 1895. 
Smaller and paler than extrusus, with a blunter vertex. Vertex shorter 
than pronotum, rounding in front. Pale straw-yellow, sometimes with a 
pair of dark spots on vertex. Length, 4.5-5 111m.; width, 2 mm. 
Vertex rounding, half longer on middle than against eyes, two-thirds the 
length of the pronotum, broadly rounding to the front. Front broad above, 
roundingly narrowing to the clypeus. Elytra broad, exposing the pygofers 
and the ultimate segment in the female, distinctly longer than the abdomen 
in the male ; venation Athysanoid, slightly variable, apical cells minute in 
female, of medium size in male. The specimens from Van Couver’s Island 
have the elytra still shorter in the female and only as long as the abdomen 
in the male. 
Color : pale straw yellow, often unmarked above, sometimes with a pair 
of dark spots on the disc of the vertex, and some of the cells on the elytra 
fuscous heightened along the margins of the light nervures ; sutures of face 
and arcs of front sometimes broadly fuscous. 
Genitalia : female segment half longer than penultimate posterior margin 
roundingly or slightlj- angularly emarginate one-tliird its depth, its apex 
with a small, pointed tooth ; male valve small, weak, triangular, one-third 
the length of the ultimate segment ; plates three times the length of the 
valve, roundingly narrowing to the broad, blunt apex, together bluntly 
spoon-shaped, the margin fringed with weak spines. 
Habitat: (Europe), Ontario, N. Y., Iowa, Colo, and Van- 
couver’s Isd. Doubtless occurs throughout the northern half of 
the United States and well up into Canada. 
ATHYSANUS VARUS BALL. 
Athysanus varus Ball. Call. Ent. XXXIII. p. 5. 1901. 
More slender than obso/etus , with the elytra long and narrow ; much 
smaller and darker than extrusus, with the cross nervures broadly tinged 
with light. Straw colored, clouded with fuscous. Vertex with transverse 
bands. Elytra dark, with the nervures light, cross nervures broadly so. 
Length, 9 5 mm., <J 4.25 mm.; width, 1.5 mm. 
