82 NORTH AMERICAN BLATTIDAE 



species. Rehn and Hebard's revision of 1912 was undertaken 

 primarily for the purpose of showing that the genera Temnopteryx, 

 Kakerlac and Loboptera had in reaHty no place among the forms 

 found in the United States, and for giving additional information 

 on the majority of the species. At that time the available mate- 

 rial was admittedly insufficient to place correctly all of the species 

 and associate their sexes. 



The present species shows nearest relationship to P. bolliana, 

 the males differing conspicuously in the features given in the com- 

 parison with that species on page 78. The females are readily distin- 

 guished by their paler coloration ; width of interocular space, which 

 is slightly but distinctly greater than that between the antennal 

 sockets; decidedly more elongate tegmina, which, however, are 

 also lateral, and presence of vestigial wings. The female supra- 

 anal plate is more sharply produced, in this respect agreeing more 

 nearly with P. america^m, but with lateral free margins beyond 

 the cerci not as decidedly concave as in that species. ^^^ 



Characters oj Male. — (Sabinal,Texas.) Size small for the genus, form slender. In- 

 terocular space faintly narrower than that between the antennal sockets, much wider 

 than that between the ocelli. Ocelli well defined. Head more evenl}- rounded than 

 in bolliana, with inter-ocular-ocellar area glabrous, showing a few microscopic pits. 

 Maxillary palpi slightly heavier than in bolliana. Pronotum deeper than in that 

 species; with greatest width distinctly caudad of mesal point; oblique sulci moderately 

 decided, but by no means as pronounced as in bolliana. Tegmina and wings nor- 

 mal, fully developed; wings (in the series) with one to three incomplete and three 

 to five complete rami of the ulnar vein. Median and dorsal abdominal segments 

 unspecialized. Supra-anal plate strongly transverse, fully three times as broad as 

 long, free margin beyond the cerci weakly convex and broadly, though weakly, 

 flattened mesad, of a somewhat similar type to that of bolliana, but showing de- 

 cidedly greater truncation. 115 Cerci more elongate than in bolliana, '^'^^ decreasing 

 more evenly and less rapidly in size distad. Genital hook situated sinistrad, a 

 sharply recurved, chitinous process, with recurved portion moderately elongate, 

 stouter and shorter than in bolliana and not as strongly recurved; mesad and adja- 

 cent is situated a \ery slender, elongate, very weakly curved, aciculate process. 



1" Females are fully compared with that sex of P. uhleriana, under that species. 



1'^ The meso-distal portion of this plate is normally bent slightly downward; its degree 

 of truncation is variable, a male from the Chisos Mountains, Texas, showing an even 

 convexity of this margin, while that from Rio Frio, Texas, shows a blunted, rotundato- 

 trigonal condition. 



1'" The series shows eight to ten, normally nine, distinct joints. 



