MORGAN HEBARD I 75 



Characters of Female. — (Chestnut Hill, Pennsylvania.) Agrees with male except 

 in the following features. Form decidedly stout. Head slightly broader, inter- 

 ocular space wider and distinctly greater than interantennal space, ocelli repre- 

 sented by small spots. Pronotum larger, evenly convex, with greatest width near 

 caudal margin, which is straight transverse. ^^^ Tegmina small, ovate-lanceolate, 

 lateral pads, reaching only slightly beyond mesal portion of metanotum. Wings 

 absent. Supra-anal plate strongly tectate, with a medio-longitudinal ridge; sub- 

 triangular in outline, with lateral margins weakly convex and apex decidedly angu- 

 late-emarginate. Cerci slightly stouter, with lateral margins scarcely crenate. 

 Subgenital plate \alvular, as typical for the Blattinae (see pi. vii. fig. 9). 



Measiireiuenls {in millimeters) 



Chestnut Hill, Pennsylvania. 



cT (21) 



9 (2?,) 



These extremes are not exceeded by any of the other specimens 

 before us and are evidently due to individual variation. 



Coloration. — d^ . General color shining blackish chestnut brown, 

 limbs chestnut to sanford's brown, ventral surface of abdomen 

 becoming burnt sienna mesad. Ocelli buffy. 



9 . General color shining blackish brown with a faint chestnut 

 tinge, this more pronounced on the limbs. Ocellar spots buffy. 

 Rarely paler females occur, approximating the normal general 

 coloration of the males, while a few males before us are as dark as 

 the normal females. 



Ootheca large, carried with suture dorsad; lateral surfaces con- 

 vex, microscopically shagreenous, with feeble depressions indi- 

 cated toward the suture, which define the egg sacks within; ventral 

 margin weakly convex, sutural margin weakly concave. Suture 

 high, delicate, transparent, with linear, oblique divisions showing 

 laterad ; above showing a series of ridges, which form a succession 

 of horseshoe-shaped links, these feebly ascending caudad, with 

 caudal margins, in consequence, briefly perpendicular. 



■-■^5 Throughout the Blattidae reduction in the organs of Hight is accompanied by a 

 broadening of the pronotum, its point of greatest width moving caudad and the caudal 

 margin becoming increasingly transverse. These features develop in absolutely pro- 

 portionate ratio, and recognition of this fact is of great importance to the systematist. 



MEM. .-\.M. ENT. SOC. 2. 



