April, 1902.] North American Species of Athysanus. 2 49 



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.) 

 Bel/oiepha/iis osboriii Van D. Trans Am. Eiit. Sc. XIX. p. 30.). 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 sexvittatus. 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 

 ^alve very small, transverse ; plates triangular, their tips acute, slightly 

 longer than the ultimate segment. 



Habitat: N. Y., Ind., Iowa, Neb. and Colorado. Only the 

 long- winged form is known. 



ATHYSANUS SIMPLARIUS NOV. NOM. 



Delloccphahis si)iiplex Van Dnzee. Trans. Am. Ent. Soc. XIX, p. 304. 1892. 



Stout, head large, form cylindrical. Venation and genitalia as in osdor/it. 

 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 



