98 NORTH AMERICAN BLATTIDAE 



Characters of i/a/e.— (Asheville, North Carolina.) Size medium small for the 

 genus, form moderately slender. Interocular space one-halfi" (to slightly less than) 

 the width between the antennal sockets, (normally) appreciably less than the inter- 

 ocellar width. Ocelli well defined. Area between eyes and ocelli appreciably flat- 

 tenedi" to a point just above the antennal sockets, with surface microscopically 

 roughened. Maxillary palpi much as in P. bolliana. Pronotum with greatest 

 width at mesal point, i« oblique sulci of disk very decided and connected caudad by 

 a short, transverse impression. Tegmina and wings normal, fully developed ; tegmina 

 broad, distinctly broader than pronotum, with point of greatest width meso-distad ; 

 wings'(in the series) with two"' to five incomplete and four to six complete rami of 

 the ulnar vein. Median segment with a moderately large mesal area supplied with 

 minute scattered hairs. Other dorsal segments unspecialized, distal margin of 

 sixth segment weakly and broadly convex in large mesal portion. Supra-anal plate 

 transverse, truncate, fully four times as broad as long, weakly declivent distad, free 

 margin weakly and briefly concave at bases of cerci, thence strongly convergent 

 and weakly convex to broadly transverse median portion. Cerci slender, with 

 (normally) ten"^ joints, decreasing evenly in size distad. Genital hook situated 

 sinistrad! a chitinous process recurved at less than a right-angle, not as elongate as 

 in hoUiana and in consequence normally concealed by the short supra-anal plate, 

 least width at point of recurvature ; mesad and adjacent is situated a very slender 

 and much longer, nearly straight, chitinous process with sharp apex directed slightly 

 sinistrad. Subgenital plate roughly subquadrate with disto-lateral angles rounded, 

 the rounding of the dextral angle slightly the broadest, the dextral margin is straight, 

 produced to this angle, the sinistral margin is (normally) rather deeply concave just 

 before the sinistro-distal angle, i" distal margin nearly straight, sub-oblique trans- 

 verse; surface of plate weakly convex but rather extensively deplanate meso-distad; 

 at the disto-lateral angles are situated, in sockets on the ventral surface of the 

 plate at the free margin, simple, slender styles, similar in size and form, in length (nor- 

 mally) each equal to about three-fifths the distance between their bases, i^o Exposed 

 portion of eighth dorsal abdominal segment, which is folded over the base of the 

 subgenital plate, decidedly short, slightly shorter than exposed portion of seventh 

 ventral abdominal segment. 



1" This is the usual condition, though in this species frequent individuals show some 

 difference. 



'^5 Often weakly concave. 



i« Occasional specimens have the greatest pronotal width very slightly caudad of the 

 mesal point. 



"'The type of Brunner's synonymous horealis is described as having but a single 

 complete ramus. This is certainly attributable to individual variation. 



i<8 Specimens with eleven distinct cereal joints are before us. 



1" Slight variation in the free margins of the subgenital plate is frequent. The con- 

 cavity of the sinistral margin, just before the sinistro-distal angle, is sometimes deep, 

 rarely subobsolete. The distal margin often shows a slight concavity. 



15" Slight variation in these appendages and in the distal diameter of the ]ilatc, results 

 in occasional specimens showing styles with length of each onc-lialf to two-thirds the 

 distance between their bases. 



