362 ENTOMOLOGICAL NEWS. [Oct., 'l/ 



Description of Type. Size minute, form broad elliptical. Head hid- 

 den under pronotum, evenly and very weakly convex from occiput to 

 clypeus; interocular space decidedly broader than that between anten- 

 nal sockets. Pronotum with latero-caudal angles acute-angulate, 

 bluntly rounded; caudal margin rather strongly concave, except mesad 

 where a brief and feeble convexity is indicated. Tegmina subquadrate, 

 distal margin truncate, weakly concave; venation obsolete, except hu- 

 meral trunk, which is weakly indicated. Wings minute, vestigial, with 

 venation obsolete; anterior field oval, posterior field indicated by ves- 

 tigial tissue. Dorsal surface of abdomen unspecialized ; median seg- 

 ment extremely narrow (longitudinally); first to sixth segments with 

 caudal margins transverse but latero-caudal angles very feebly pro- 

 duced, almost rectangulate, with acute apices each supplied with a 

 bristle; seventh and eighth segments transversely narrower, the eighth 

 with caudal margin broadly convex between the cerci. Supra-anal plate 

 delicate in .structure, bilobate, about three times as wide as its greatest 

 length; lateral margins weakly convex convergent, armed with bristles; 

 distal margin briefly acute-angulate emarginate mesad, with lateral por- 

 tions weakly convex, curling dorsad and supplied with numerous hairs; 

 latero-caudal angles broadly rounded. 6 Cerci conical, extending as far 

 as distal margin of supra-anal plate, apex acute, articulations subobso- 

 lete. Concealed genital hook situated sinistrad, elongate and slender, 

 distal portion curved sharply dextrad, forming nearly a semicircle, 

 with apex acute. Subgenital plate broader than long; lateral margins 

 straight, parallel to style sockets, distal portion of plate between these 

 moderately produced with distal margin broadly convex. Styles and 

 limb armament as given in generic diagnosis. Pulvilli and arolia ab- 

 sent. 



A single immature female before us shows the ocular, pronotal and 

 cereal development similar to a male in the same instar. The subgeni- 

 tal plate 7 shows indications of a distal medio-longitudinal sulcation, 

 while from within the succeeding segment projects, showing styles 

 similar to those of the male sex. 8 



Measurements (tit millimeters). 3 



t; In texture and many features of contour, similarity with Compsodcs 

 schwarzi Caudell is found. 



7 See generic diagnosis. In adult females of this species there is 

 little doubt but that this plate is much as in rchni. 



* This condition in immature females has been observed in other 

 forms of the Blattidae. 



11 Taken under the microscope. 



