178 PROCEEDINGS OF THE ACADEMY OF [May, 



and wings completely absent. Abdomen slightly compressed, weakly 

 carinate medio-longitudinally dorsad, extremity slightly recurved: 

 furcula developed as short, broad, rounded well-separated lobes; 

 lateral sections of the segment bearing the furcula sublamellate and 

 projecting over the lateral face of the cereal base, the margin of these 

 lobes arcuate obtuse- angul ate: supra-anal plate moderately produced 

 and constricted trigonal, the apex moderately broad, rounded, lateral 

 margins with the cereal emargination broad, moderately deep and 

 regularly arcuate, distal section of plate slightly deflected ventrad 

 from the plane of the proximal portion of the same, the deflected por- 

 tion with lateral sulci limiting a median rounded "boss": cerci falci- 

 form, short, not surpassing the apex of the supra-anal plate, proximal 

 portion of the cerci very broad, then tapering strongh^ to the rela- 

 tively slender and moderately acute distal portion, the whole cercus 

 placed so as to incline toward the median line of the body: subgenital 

 plate very short, broad, not at all produced, when seen from the lateral 

 aspect rounded, the dorsal margin broadly U-shaped.^^ Prosternal 

 spine moderately compressed conical, acute, arising from a broad 

 base. Interspace between the mesosternal lobes subcuneate, slightly 

 longer than broad: metasternal lobes touching on their caudal half. 

 Cephalic and median femora moderately inflated, appreciably arcu- 

 ate, cephalic genicular lobe of each of these femora larger than the 

 caudal lobe of the same. Caudal femora about twice as long as the 

 head and pronotum together, surpassing the apex of the abdomen by 

 nearly one-half the femoral length, moderately slender, external 

 paginae regularly and distinctly sculptured, genicular lobes moderately 

 acute, median section of dorso-genicular margin with a distinct pro- 

 jecting spine: caudal tibiae very slightly shorter than the femora, 

 distinctly expanded distad, the margins there considerably lamellate, 

 marginal hairs few in number but individually long and regularly dis- 

 posed, external margin with seven spines, internal margin with eight 

 to nine spines: caudal tarsi not quite one-half as long as the caudal 

 tibise, slender, the first and second joints together but slightly longer 

 than the third, the second joint about one-half the length of the first 

 joint, which is considerably depressed. 



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

 The female differs from the male description in the following fea- 

 tures. Interspace between the eyes subequal to the width of the sec- 

 ond antennal joint, the vertex caudad of the interspace hardly more 



29 The type has this plate compressed, apparently unnaturally so, and we are 

 taking its marginal form from the paratypic male, which, apparently, represents 

 the normal type. 



