1906; 



NATURAL SCIENCES OF PHILADELPHIA. 



403 



cerci slender, strongly tapering in the proximal half, very slightly 

 tapering in the distal half, apex blunt and very slightly excavated and 

 falling considerably short of the apex of the supra-anal [plate; sub- 



Fic i5.—Podisma oreas n. sp. Mammoth Hot Springs, Yellowstone Park. 

 "^ Lateral ^^ew of male type. (X 4.) 



genital plate with the apical margin slightly elevated, the whole plate 

 evenly tapering to this section, which is narrowly subtruncate and 

 with a slight depressed area immediately caudad of the margin. 

 Prosternal spine erect, slightly retrorse, thick and rather blunt. Inter- 

 space between the mesosternal lobes distinctly broader 

 than long in the c^ . over half again as broad as long in 

 the 9 ; metasternal lobes sub-attingent in the c?, sep- 

 arated by a subquadrate interspace in the 9 . Median 

 and cephalic limbs no more inflated in the d than in 

 the 9 . Caudal limbs moderately robust, femora reach- 

 ing to the apex of the abdomen; caudal tibiffi with 

 eleven spines on each margin. 



General color bistre in the 6", burnt umber in the 9 . 

 Postocular streak rather faint and weak, seal brown in 

 color; antennse carmine, rather dull distad. Tegmina 

 in the c^ darker ventrad than dorsad, unicolorous in the 9 . Stripes 

 on the pleura distinct. Caudal femora with indications of two dark 

 bars, chevron-shaped on the faces, the light color being an ecru drab, 

 genicular arches and proximal section of the lobes on the internal face 

 blackish, ventral face canary yellow, duller in the male than m the 

 female; caudal tibitB very dull olive green in the 6" and ochraceous m 

 the 9 , except the dorsal face which is gamboge yellow in both sexes; 

 spines black. 



Fig. 1 6. — Po- 

 dlsma oreas 

 n.sp. Dor- 

 sal view of 

 apex of 

 maleabdo-' 

 men. (X4.j 



