1918.] NATURAL SCIENCES OF PHILADELPHIA. 155 



agglutinated hairs, certain of which appear spiniform, the remainder 

 of the margin and a large portion of the ventral surface of the plate 

 with long hairs, many of which are bristle-like; sinistral style strongly 

 arcuate, the apex directed laterad and with a number of distinct 

 but short teeth; dextral style very short, decurved, rounded at 

 the apex, with there a number of similar short teeth. Cephalic 

 femora with the ventro-cephalic margin bearing three mechan and 

 three distal spines, the latter group increasing in length clistad, 

 the area between the two groups with a continuous, regularly spaced 

 series of short, piliform spinules, no cUsto-dorsal genicular spine 

 present: median and caudal femora with a distinct disto-dorsal 

 genicular spine, ventral margins with large, well-spaced spines: 

 arolia distinct; caudal metatarsus faintly longer than the remaining 

 joints combined. 



Allotype: 9 ; Same data as type. [Acad. Nat. Sci. Phila.] 

 The following features are those of difference from the description 

 of the type. Interspace between the eyes wider, more than two- 

 thirds as wide as that between the ocellar spots, which area is nearly 

 twice as great as the greatest length of one of the spots; ocellar spots 

 somewhat smaller and less conspicuous than in the male : eyes with 

 their greatest depth but faintly greater than the interocellar width. 

 Abdomen simple: supra-anal plate moderately transverse, arcuate, 

 the chitin with a median V-emargination which is filled with a semi- 

 opaque membrane,^- dorsal surface of the plate with a distal, medio- 

 longitudinal, carinate fold, the free margin of the plate with numerous 

 long, bristle-like hairs: subgenital plate large, distal margin arcuate- 

 truncate between the cerci. Cephalic femora with the median 

 group of large spines numbering four.^* 



General tone of the dorsal surface clear dresden brown to mars 

 brown, the venter largely fuscous. Head blackish fuscous, the 

 clypeus and mandibles ochraceous-buff; ocellar spots warm buff: 

 eyes mars brown to mummy broA^ai: antennae clove brown, the 

 proximal joint faintly ochraceous. Pronotum with the disk blackish 

 fuscous, more or less distinctly divided in two by a medio-longitudinal 

 line of kaiser browai to liver brown; broad lateral margins, a connected 

 and narrower cephalic margin and a detached, usually weaker, 

 caudal margining of warm buff to ochraceous-buff, the dark disk 



12 In two paratypic females this membrane is not apparent, the margin being 

 distinctly and clearly V-emarginate. Apparently this soft area is not a perma- 

 nent structure and may be due to the hardening of exuded body fluids. 



1^ Two paratypic females agree with the allotype in the number of these spines, 

 while the type has but three. 



12 



