134 THE BLATTIDAE OF PANAMA 



Chorisoneura cabimae new species (Plate VI, figures 14 and 15.) 



Of the species of Chorisoneura before us, the present insect shows 

 nearest relationship to C. transliicida (Saussure). It differs in the 

 distinctive interocular marking and male genitalia. The styles 

 show the greatest truncation of any species of the genus at hand. 

 The tegmina have the veins and interspaces unicolorous, as in 

 the majority of Mexican specimens of translucida before us, but 

 unlike material from the more southern portions of the continent 

 which we have assigned to that species. 



Type. — cf ; Cabima, Panama. May 19, 1911. (A. Busck.) 

 [United States National Museum.] 



Size medium for the small species of the genus; form depressed, surface glabrous. 

 Head with occiput largely exposed. Interocular space about one and one-fourth 

 times the occipital ocular depth, about two-thirds the width between the antennal 

 sockets. Maxillary palpi with fifth joint enlarged and elongate, slightly longer than 

 third, fourth about three-quarters as long as third joint. 



Pronotum transverse, subelliptical; greatest width meso-caudad; cephalic and 

 caudal margins transverse, feebly convex; latero-cephalic angles distinctly more 

 broadly rounded than latero-caudal angles. Tegmina surpassing apex of abdomen by 

 slightly more than pronotal length, strongly elongate lanceolate, narrower than in 

 C. specilliger and C. gemmicula here described ; costal and sutural margins evenly and 

 feebly convergent, straight from proximal third to the sharply rounded apex, as in 

 translucida, distinctly less acute than in specilliger and gemmicula; scapular field as 

 in translucida, not as broad as in specilliger or gemmicula; discoidal vein longitudinal 

 with (twelve to fourteen in series, of which two to five distal are subobsolete) costal 

 branches which are almost straight; discoidal sectors (five to eight) oblique. Wings 

 and venation very delicate; appendicular field nearly as long as broad, basal outline 

 forming very slightly more than a right-angle; costal veins (seven to nine) 

 moderately heavily clubbed distad, the clubs not as heavy as in specilliger or gem- 

 micula, discoidal and median veins connected by (six to seven in series) \^ery in- 

 conspicuous transverse veinlets, other transverse veinlets subobsolete. Dorsal 

 surface of abdomen with sixth segment specialized, showing a relatively large but 

 shallow, subcircular median depression, the caudal margin of which is somewhat 

 raised and thickened, the depressed area containing a number of agglutinated hairs, 

 closely pressed upon its surface and directed longitudinally. 



Supra-anal plate triangularly produced, with sides feebly concave to the rather 

 broadly rounded apex, length one-third basal width. Subgenital plate small, 

 latero-caudal portions minutely produced and sharply rounded outside cereal bases, 

 brief lateral portions of free margin thence nearly transverse, subconcave, to the 

 large styles which are set in sockets; styles heavy, slightly over twice as long as 

 broad, lamellate, with a weakly oblique row of microscopic teeth on interno-caudal 

 face near apex, the apex itself broadly rounded, truncate, with a minute and sharply 



