SUBFAMILY IX. OXYHALOIN.E. Ill 



880, U. S. N. M.) was found on the ground beneath some cab- 

 bage palmetto leaves, April 10, 1915. The other was taken while 

 it was flying slowly and close to the ground across a sandy road- 

 way on March 5, 1919. Two females were collected at Auburn- 

 dale by N. R. Wood and sent to Caudell, and Davis found a single 

 male among his series of Pycnoscclus. It was taken at Lakeland 

 May 4, 1912. 



Subfamily IX. OXYHALOIN^E. 



Species of small size, having the head broad ; ocelli absent or 

 indicated by spots ; middle and fore femora armed beneath with a 

 single elongate apical spine; supra-anal plate of female distinctly 

 emarginate; fourth joint of tarsi alone (in our genera) with a 

 pulvillus; large arolia present. 



KEY TO EASTERN GENERA OF OXYHALOIN/E. 



a. Subgenital plate of female cleft at apex; tarsal claws simple; styles 

 of male concave, their bases contiguous, arising from the middle of 

 hind margin of subgenital plate; length of body, $ , 7.8 8.3 mm. 



I. CHORISONEURA. 



art. Subgenital plate of female simple; tarsal claws with two minute teeth 

 on middle of inner margin; styles slender, cylindrical, arising each 

 side of the subquadrate emarginate apical portion of subgenital 

 plate; length of body, $, 5.4 5.7 mm. II. PLECTOPTERA. 



I. CHORISONEURA Brunuer, 1865, 255. (Gr., "separate" -(- "veins") 



Head triangular; eyes widely separated; pronotum broad, its 

 sides rounded, feebly declivent; tegmina delicate, narrow, strong- 

 ly tapering to the sharply rounded apex; wings fully developed, 

 with 10 to 13 costal veins, the majority of which are clavate at 

 apex, their appeudicular field slightly wider than long; lower 

 front margin of fore femora with a fringe of hairs, those on apical 

 half spiniform. 



40. CHORISONEURA TEXENSIS Sauss. & Zehnt., 1893, 80. Small Yellow Texas 

 Roach. 



Male Nearly uniform pale reddish-brown; sides of pronotum, mar- 

 ginal field of tegmina and wings transparent, often with a yellowish tinge. 

 Head about as broad as long, the interocular space nearly as wide as that 

 between antennal sockets. Pronotum subelliptical, hind margin subtrun- 

 cate, front one feebly rounded- Sixth dorsal abdominal segment with a 

 small rounded area at middle of base thickly covered with agglutinated 

 hairs. Supra-anal plate twice as wide as long, its hind margin feebly 

 rounded. Cerci 9-jointed, fusiform, their upper surface depressed and con- 

 cave. Female Very similar to male, the supra-anal plate transverse and 



