Small Yellow Texas Cockroach

Chorisoneura texensis Saussure and Zehntner (Plate X, figures 7 and 8.)
1893. Chorisoneura texensis Saussure and Zehntner, Biol. Cent.-Anier., Orth., i,
p. 80. [cf : New Mexico;"' Texas.] 1904. Chorisoneura plocea Rehn. Ent. News, xv, p. 184. [ 9 , Coast of South Carolina.]
Confusion In the description of the tegminal venation of plocea, and the ambiguity in the description of the costal veins of the wing in texensis, accounts for the above synonymy. The venation in tegmina and wings in the type of plocea agrees fully with the description of texensis and with Texan material of the species now, before us."'^
The obtuse-angulation of the base of the appendicular held of the wings distinguishes this insect, from all the other species of the genus we have been able to examine.
Characters of Male. — (Esperan za Ranch, Brownsville, Texas.) Size medium small form moderately broad for the genus. Head immaculate in coloration; width about equal to length; interocular space slightly narrower than the broad space between the antennal sockets. Pronotum subelliptical, with caudal margin (usually) almost transverse, very weakly convex. Tegmina with margins distad convergent and moderately convex to apex; discoidal sectors (10 to 13 in series) rather strongly oblique, the great majority springing from the median vein. Wings with numerous (10 to 13 in scries) costal veins, of which the more proximal (6 to 8 in series) are heavily clavate distad; discoidal and median vein connected by (6 to 8 in series) transverse veinlets; ulnar vein unbranched; axillary vein with two branches, these run to near the caudal angle of the appendicular held; appendicular field with base forming an angle of slightly more than 90°, width of field slightly greater than length. Sixth dorsal abdominal segment with a rounded meso-cephalic area, thickly supplied with agglutinated hairs, which lie flat and are directed caudad.''" Supra-anal plate strongly transverse, caudal margin weakly conex. Cerci elongate fusiform, depressed (usually composed of nine joints). Subgenital plate small, with distal margin briefly concave to two slender, adjacent, mesal scutes (styles) which, converging, become contiguous distad; between the bases ot these is a small, slender, chitinous projection, closely pressed between the much longer scutes, which project dorsad to the apex of the supra-anal plate. Armament of limbs, puK illi and arolia, as gien in generic description.
'" This New Mexican record suggests an error of some kind; ihe species has not been found, and, in our opinion, does not occur, in truly desert regions, nor has it eer been taken in the mountainous regions of the southwestern United States.
'"* The synonymy of plocea with texensis has been established by Rehn and Hebard, Proc. Acad. Nat. Sci. Phila., 1916, p. 120, (1916).
'" This area is incon.spicuous and might easily be overlooked in the present species.
Characters of Female. — (Esperanza Ranch, Brownsville, Texas.) Very similar to male, differing in the following features. Dorsal surface of abdomen unspecialized.

Chorisoneura texensis, the small Texas cockroach, is a small species of cockroach (family Ectobiidae) native to the Southeastern United States.