April, 1902.] North American Species of Athysanus. 
249 
Genitalia : female segment one-third longer than penultimate, with the 
lateral margin suddenly narrowed from near the base, then roundingly pro- 
duced, the posterior margin with three faint lobes, produced part of nearly 
equal length and breadth. From under the emarginate side of the segment 
appears the acutely produced lateral angles of another membrane. 
Habitat : Females from Texas and La. The male is, as yet, 
unknown. 
ATHYSANUS OSBORNI VAN DUZEE. (Plate 17, Fig. 4.) 
Del/ocephalus osborni Van D. Trans Am. Ent. Sc. XIX. p. 304. 1S92. 
Bright straw yellow, sometimes tawny, four black spots back of the ver- 
tex margin. Size of obsoletus, but with a flatter vertex and more flaring 
elytra, venation Deltocephaloid, the central anteapical cell divided. Larger 
and lighter colored than sexvitlatus. Length, 9 5.5 mm., $ 5 mm.; width, 
2 mm. 
Vertex flat, a trifle rounded on the margin next to eye, obtusely, round- 
ingly angled, over two-thirds the length of the pronotum. Face nearly flat ; 
front broad above, approaching the eyes, rounding below to the straight 
clypeus, without a visible suture. Pronotum with the lateral margins very 
short, the humeral ones long and straight. Elytra long, narrow, flaring, 
two cross nervures between the sectors, three anteapical cells, the central 
one divided, often other cross nervures present, especially on the clavus. 
Color : straw yellow, washed with golden or tawny ; vertex with four 
black spots just back of the anterior margin, the inner pair the larger ; five 
pale lines on pronotum. Elytra with the nervures milk white, sometimes 
slightly and interruptedly fuscous-lined. Face pale, front with pale olive 
arcs, sutures around lorae, fuscous ; femora twice annulate with fuscous, 
tibiae spotted. 
Genitalia : female segment scarcely as long as the penultimate, lateral 
margins abruptly narrowed from near the base, exposing a rounding lobe of 
the membrane beneath, posterior margin of the narrowed segment round- 
ingly emarginate, with a blunt median tooth, pygofers rather narrow ; male 
valve very small, transverse ; plates triangular, their tips acute, slightly 
longer than the ultimate segment. 
Habitat; N. Y. , Iud., Iowa, Xeb. and Colorado. Only the 
long-winged form is known. 
ATHYSANUS SIMPLARIUS NOV. NOM. 
Dellocephalus simplex Van Duzee. Trans. Am. Ent. Soc.. XIX. p. 304. 1S92. 
Stout, head large, form cylindrical. Venation and genitalia as in osborni. 
Greenish yellow, sometimes quite green on the elytra. Vertex with four 
large, black spots back of the anterior margin. Length, 4.75 mm.; width, 
1.75 mm. 
Vertex large, sharply right-angled, as long as the pronotum, nearly twice 
as long on middle as against eye ; front very broad above, almost touching 
the eyes, a little inflated, angularly narrowing from the antennae to the 
•clypeus. Pronotum long, pushed forward between the eyes, posterior 
