MORGAN HEBARD I 25 



the first two joints which are blackish chestnut brown. The 

 minute globose ocelli are yellowish. 



The higherto unknown female differs from the male in the follow- 

 ing features. Size larger, form broader, Head with interocular 

 space distinctly broader, slightly greater than the proportionately 

 greater space between the antennal sockets. Pronotum more 

 ample. Tegmina reaching beyond the abdomen a distance about 

 equal to one-third their length (in the male reaching beyond the 

 abdomen a distance equal to half their length). Supra-anal plate 

 very strongly transverse, length about one-eighth proximal width, 

 free margin broadly convex laterad, broadly concave mesad. 

 Subgenital plate valvular, valves vertical, each subrectangulate, 

 with length slightly over half basal width, dorso-distal and ventro- 

 distal angles broadly rounded and the free margins all very feebly 

 convex, basal sulcus transverse, straight, Init surface of plate at 

 that point strongly convex. ^-^^ 



As the male genitalia were injured in the type, we would note the 

 following features. Supra-anal plate very strongly transverse, 

 length less than one-eighth basal width, free margin strongly 

 oblique laterad, transverse in median section, the angles thus 

 formed very broadly obtuse-angulate and rounded. Subgenital 

 plate appreciably more produced dextrad than sinistrad, supplied 

 with two simple, straight styles, which are about six times as long 

 as wide mesad; free margin strongly oblique to sinistral style, 

 thence less strongly oblique to before base of dextral style, there 

 rounding broadly into the feebly oblique, straight dextral margin. 



Subfamily OXYHALOINAE 



Key to the knouni Panamanian species of Chorisoneiim'^'^- 



A. Size relatively large (length of tegmen, 10 mm. or more). (Occiput reddish 

 brown, interocular area whitish with two pairs of dark brown dots. Median por- 

 tion of male subgenital plate, between bases of styles, with an elongate process, 

 armed at apex with two slender spiniform teeth, which curve toward each other.) 



panamae new species 



I''' This rather suggests the type normal for the Blattinae. In that subfamily, how- 

 ever, we know of no species in which the valves themselves are as highly specialized. 



152 This key is furnished merely as an aid in locating Panamanian material. The 

 multitude of species and numerous difficult, though valuable, characters of specific 

 diagnostic importance require a much more detailed study. 



MEM. AM. ENT. SOC, 4. 



