MORGAN HEBARD 1 27 



leaves no room for doubt that coidoniana must be placed in the 

 synonymy under the older P. peiisylvanica (De Geer). 



Normal representati\-es of l)oth sexes of the present species 

 agree in many ways with P. fiilvescens, but are very much larger. 

 In the male, however, the specialization of the proximal dorsal 

 abdominal segments is of the type found in P. caudelli, the pro- 

 jections being more pronounced in lata. In the female the teg- 

 mina are normally roundly truncate distinctly beyond the apex of 

 the anal field, a condition ne\'er found in females oi fulvescejis. 



This is the largest and most robust of the normally pale species 

 of the genus. The maximum intensive coloration, found in males 

 from the Mississippi xalley region, gives such specimens a decided 

 similarity to that sex of P. pensylvanica; however, these are easily 

 separated by the very different specialization of the proximal ab- 

 dominal segments, outline of sixth dorsal abdominal segment and 

 of supra-anal plate, and the less elongate and broader tegmlna and 

 wings. 



Characters of Male. — (Raleigh, North Carolina.) Size large, form robust. Head 

 rather evenly rounded for this sex, ocelli well-defined, margins of ocellar areas round- 

 ing weakly into inter-ocular-ocellar area, which area is feebly flattened. Pronotum 

 am|)le, with greatest width (normally) mesad,202 but with lateral margins from this 

 point slightly more convergent cephalad than caudad, oblique sulci of disk weakly 

 defined. Tegmina and wings fully developed, normal; tegmina moderately broad, 

 but with point of greatest width meso-proximad; wings (in the series) with two to 

 four incomplete and five to seven complete rami of the ulnar vein. Median seg- 

 ment supplied mesad with two small and weak ridges, convergent cephalad, with 

 cephalic faces of each supplied with a heavy tuft of hairs, surface of segment well 

 supplied cephalad of these ridges with minute, but rather stout, scattered hairs. 

 First dorsal abdominal segment similarly specialized in every way, except that the 

 ridges are slightly more pronounced and the scattered hairs cephalad are fewer. 

 Sixth dorsal abdominal segment with distal margin nearly straight, transverse; 

 seventh with distal margin weakly angulate-emarginate mesad, with sides of emar- 

 gination convex; eighth with distal margin showing (normally) a similar, but very 

 slight, emargination. Supra-anal plate with lateral margins convergent and weakh- 

 con\ex from cerci to broadly rounded apex, 203 surface very briefly convex abo\e 

 cerci, feebly and unevenly concave in entire remaining portion, which is strongly 



202 Frequent specimens in the series show this slightly caudad of the mesal point. The 

 margins of the pronotum also often show slight differences in the degree of curvature. 



-"•■' Frequent variation occurs in the form of this plate; often slight irregularities of the 

 margins are found, while the apex varies from broadly blunt (though never as blunt as in 

 pensylvanica) to rather sharjily rounded. 



MEM. AM. ENT. SOC, 2. 



