164 ENTOMOLOGICAL NEWS. [May, '04 



A New Roach of the Genus Chorisoneura from 



South Carolina. 



BY JAMES A. G. REHN. 



Chorisoneura plocea* n. sp. 



Type : 9 ; Coast of South Carolina. [Collection of Mr. 

 Morgan Hebard, of Chestnut Hill, Philadelphia.] 



Apparently closely allied to C. texensis Saussure and Zehnt- 

 ner, but differing in the greater number of costal veins of the 

 wings and the ranii of the median vein of the tegmina. No 

 close relationship appears to exist with Central American or 

 Mexican types, texensis being no doubt the closest ally. 



Size small ; form elliptical, depressed, surface glabrous. Head exserted, 

 the whole anterior portion projecting beyond the pronotum, rounded ; 

 eyes elongate reniform ; interocular space great, equal to the length of 

 the eye ; antennae setiferous. Pronotum transverse, elliptical, the an- 

 terior portion much more arcuate than the posterior ; lateral portions 

 regularly rounded ; entire border sub-cingulate. Tegmina sublanceolate, 

 the margins parallel for a considerable distance, apex rather acute- 

 angulate ; basal field rather narrow, elongate, not reaching to the middle 

 of the tegmen ; costal veins numerous and regularly disposed ; rami of 

 the median vein about twelve in number ; anal field elongate pyriform, 

 with four distinct veins. Wings elongate ; costal margin concave basally, 

 convex toward the apex ; appendicular field with the base obtuse-angulate, 

 apex broadly rounded ; costal veins about twelve in number, elongate- 

 clavate ; medio-discoidal area broad, with ten cross-veins, broader than 

 the medio-ulnar area ; ulnar vein without true rami ; anal vein biramose. 

 Supra-anal plate transverse, obtuse-angulate, the angle with a narrow 

 triangular incision ; cerci elongate-fusiform, depressed, equal to the sub- 

 genital plate in length ; subgenital plate broad, transverse, apical margin 

 truncate. Femora without distinct spines on the inferior margins, genicu- 

 lar spines present. 



General color pale ochre yellow ; wings pellucid, with the veins yel- 

 lowish ; disk of the pronotum orange-ochraceous ; eyes blackish-brown ; 

 abdomen raw sienna, the segments ventrally margined with buff. 



MEASUREMENTS. 



Length of head and body, . . 8. mm. 



Length of pronotum, .... 2. 



Greatest width of pronotum, . . 3.2 



Length of tegmina, . . . . 8.2 



Greatest width of tegmina, . . 2.9 



Length of wings, . . . . . 85 



Greatest width of wing, . . 5.5 



Greatest length of appendicular field, . 5. 



Greatest width of appendicular field, . 2.9 



* From TrAo/aa, in allusion to the folding of the wing. 



