1 86 NORTH AMERICAN BLATTIDAE 



weakly convex mesal area. Tegmina and wings elongate and fully developed, not 

 as broad proportionately as in brunnea. Dorsal surface of abdomen with median 

 segment specialized as in brunnea, but with sulcus somewhat deeper and silky hairs 

 of mesal tuft shorter. Other dorsal abdominal segments much as in brunnea, caudal 

 margin of sixth showing weaker lateral convexity and very shallow, mesal, angulate 

 emargination. Supra-anal plate entirely chitinous.^^^ surface weakly depressed in 

 a weakly arcuate line between cereal bases; lateral margins concave and convergent 

 to the broad, transverse distal margin, latero-caudal angles thus formed subrectan- 

 gulate and almost acute; production of plate slightly greater than in brunnea. 

 Cerci much as in that species, slightly more elongate and a very little more slender. 

 Sinistrad within the anal chamber, an elongate, slender, flattened-cylindrical, chiti- 

 nous arm extends caudad, showing arcuation ventrad, but distad curving dorso- 

 sinistrad and narrower in this portion preceding the apical portion, to which it is 

 subequal in length; apical portion straight, as wide as shaft before its dorsad curva- 

 ture, three and one-half times as long as broad, flattened spatulate and scarcely 

 narrowing to the broadly rounded apex, dorsad at the base of this apical portion is 

 situated a sharp, recurved thorn. ^^^ Above this, a heavy chitinous arm is directed 

 sinistrad, distad it is flattened and the dorsal and ventral margins, which are sub- 

 chitinous and microscopically serrate, are straight, convergent to the acute apex. 

 IMesad a very slender, almost straight, aciculate, chitinous process is directed dex- 

 trad, while sinistrad a large chitinous lobe is found, with caudal face deplanate and 

 distal margin arcuato-angulate. Subgenital plate similar to that of americana, 

 except that the emarginations at the style sockets are more decided, the broad trans- 

 verse mesal portion of the free margin shows a marked mesal emargination and the 

 styles are about as long as the length of the plate, thus a further specialization of 

 the type found in brunnea is shown. 



Characters of Female. — (Big Pine Key, Florida.) The distinctive coloration of 

 pronotum and tegmina, alike in both sexes of the present species, serves best to 

 distinguish the female of this insect. Compared with the male, this sex is found to 

 be larger and more robust, with pronotum proportionately even deeper and more 

 evenly convex in contour and outline. Tegmina and wings proportionately less 

 elongate, showing a moderate contrast between the sexes. Supra-anal plate with 

 mesal emargination similar to that of brunnea. Subgenital plate as typical for the 

 Blattinae. 



Measurements {in niillimctcrs) 



Length Length Width Length Width Length Length 



Cf of of of of of of of 



body pronotum pronotum tegmen tegmen ccrcus caudal tibia 



Orlando, Florida 25 6.9 8.7 26.2 8.4 5.2 10 



Everglade, Florida 23.6 6.2 8.3 24.8 7.9 4.6 9.4 



Homestead, Florida 25.5 7.2 9.3 26.3 8.4 5.1 10.2 



•^^ Frequently the texture of the plate is found to be more delicate toward the distal 

 margin, this sometimes extending in a medio-longitudinal line suggesting sulcation. 



-'•"^ The distal portion of this process is consequently shaped much like a boat-hook, 

 with blunt point. In this feature australasiae shows marked affinity to the otherwise 

 very different P. fuliginosa. 



