MORGAN HEBARD II5 



Males of this species agree witli those of P. iihleriaua in the 

 type of specialization of the median segment, the ridges there 

 found, however, being normally less pronounced in the present 

 insect. The males of these species, which show some general simi- 

 larity, are compared under uhleriana. The sharply rounded ele- 

 vation of the inner surface of the subgenital plate at the base of the 

 dextral style, which occurs in the present insect, is not found in 

 any other species of the genus, but this feature shows occasional 

 individual variation in males from the southeastern United States, 

 and in those before us from Texas is very weakly indicated. 



The females could only be confused with those of P. virginica 

 and P. lata. Females of the former are smaller^"; of the latter, 

 much larger, more robust, with pronotum more transverse, and 

 truncation of tegmina almost always commencing on the sutural 

 margin distinctly beyond the apex of the anal area. 



Characters of Male. — (Thomasville, Georgia.) Size medium for the genus, form 

 moderately slender. Interocular space intermediate in width to that between 

 the ocelli and that separating the antennal sockets, wider than is normal in iiJileriana 

 and showing (in the series) less variability than in that species. Ocelli well defined. 

 Area between eyes and ocelli (normally) showing a weak flattening, not as decided 

 as in uhleriana. with a few minute punctae. Maxillary palpi much as in uhleriana, 

 but with third and fifth joints subequal in length, each slightly longer than fourth 

 joint. Pronotum (normally) with greatest width slightly caudad of mesal point, 

 with cephalic angles more broadly rounded than caudal angle, ^"^ oblique sulci of 

 disk weakly defined. Tegmina and wings normal, fully developed; tegmina pro- 

 portionately narrower than in uhleriana: wings (in the series) with one to four 

 incomplete and four to six complete rami of the ulnar vein. Medium segment sup- 

 plied mesad with two weakly arcuate, feebly raised ridges, which are convergent 

 cephalad, with brief cephalic faces each supplied with a heavy tuft of hairs, the 

 surface of the segment is also supplied cephalad of these ridges with minute, scat- 

 tered hairs. Other dorsal segments unspecialized, distal margin of sixth segment 

 as in uhleriana. Supra-anal plate much as in tihleriana, but with surface feebly 

 convex above cerci, declivent distad, the produced distal portion slightly the more 

 declivent, thus showing a feeble, weakly convex, delimiting ridge between the cerci. 

 Cerci slender, with (normally) eleven joints. Genital hook situated sinistrad, a 



'"" Full comparison is made under virginica. 



^'* Rare specimens have these angles similarly rounded, as is normal in uJilcriana. 

 Other individuals occasionally have the oblique sulci of the pronotal disk unusually 

 pronounced, as in that species. 



MEM. AM. EXT. SOC, 2. 



