1 90 



NORTH AMERICAN BLATTIDAE 



very slender, slightly curved, chitinous spine. Sinistrad a large, chitinous plate, 

 with caudal face deeply concave meso-proximad and distal margin broadly rounded, 

 occupies the remaining area of the anal chamber. Subgenital plate of same type 

 as in P. americayia, but with lateral margins continued convergent and produced 

 slightly beyond the niches formed by the style sockets, distal margin distinctly 

 emarginate, as much as in australasiae, but in the present species the distal margin 

 is broader, the margins of the emargination weakly convex and latero-caudal angles 

 formed with lateral margins sharply rounded. 



Characters of Fewa/e.— (Jacksonville, Florida.) The uniform coloration of pro- 

 notum and tegmina, alike in both sexes of the species, serves best to distinguish the 

 female of this insect from the other North American forms of the genus. Com- 

 pared with the male, the female is found to be slightly larger and distinctly more 

 robust, with pronotum more ample. The tegmina and wings show hardly any con- 

 trast between the sexes. The supra-anal plate has the mesal emargination brief, 

 as in hrunnea and australasiae. Subgenital plate normal for the genus. 



Measurements {in millimeters) 



7 



Thomasville, Georgia 24.5 



Jacksonville, Florida 26 



Jacksonville, Florida 29 



DeFuniak Springs, Florida. 27 



Crowley, Louisiana 25 



9 



Thomasville, Georgia 26 . 9 



Jacksonville, Florida 27.3 



Jacksonville, Florida 25.5 



Evergreen, Alabama 26.3 



Evergreen, Alabama 29.7 



Orange, Texas 26 . 3 



Orange, Texas 3- -5 



Length Length Width 



of of of 



body pronotum pronotum 



6.9 8.8 



7-3 9-2 



7.8 10 



7-3 9-2 



7 9-2 



Length Width 



of of 



tegmen tegmen 



Length Length 



of of 



cercus caudal tibia 



7.2 



8 

 8.3 



9-7 

 10.7 

 II .2 

 10.2 

 II . I 

 10 

 10.9 



25.6 

 26.6 

 27.9 

 28.6 

 26 



22.7 

 26.2 

 26.4 

 24.2 

 25.6 

 24.7 

 26.4 



8.2 



8.7 



9-4 



8.8 

 8.2 



8.6 



9-4 



9-7 



9 



9-4 



8.8 



9-3 



5 



5-9 

 6.2 

 6.1 



5-3 



5-4 



6 



6.2 



5-9 



6.3 



5-8 



6.1 



10.9 



11.8 

 II. 8 

 II .2 



10.6 

 II. 7 

 II. 6 

 10.8 

 12. 1 

 10.4 

 II. 6 



The extremes of the series before us are all measured. Such 

 variation as is shown by the above tables, may be wholly attributed 

 to individual variation. 



Coloration. — Shining brownish black; tegmina, mouthparts and 

 limbs with a bay tinge. Mesonotum and metanotum ochraceous- 

 btiff, dorsal surface of abdomen gradually deepening from this 

 color to deep bay distad. In the occasional recessive extremes the 

 coloration is solid; bay, with a chestnut tinge on head, pronotum 

 and limbs. 



