402 PROCEEDINGS OF THE ACADEMY OF [Sept., 



above the railroad pumping station. This species seemed to be strictly 

 terrestrial in habitat. 

 Podisma oreas-^n. sp. 



Types : cJ^ and 9 ; summit of foothill of Gallatin Range, Mammoth 

 Hot Springs, Yellowstone National Park, Wyoming. Altitude, 7,000 

 feet. Aug. 5, 1904. [Coll. Morgan Hebard.] 



Closely allied to P. ascensor Scudder from American Fork Canon, 

 Utah, agreeing almost perfectly in the form of the abdominal append- 

 ages and other characters, but differing in the vertex being somewhat 

 elevated, the interspace between the eyes in the male over twice as 

 broad as the first antennal joint, the frontal costa more sulcate, the 

 size slightly larger, the antennse reddish and the caudal tibiae differently 

 colored. 



Size medium (for the genus). Head with the occiput rounded and 

 distinctly elevated above the pronotum in the c?, hardly elevated in 

 the ? ; fastigium moderately declivent, very shallowly and broadly 

 excavated, interspace between the eyes in both sexes over twice as 

 wide as the proximal joint of the antennae; frontal costa broad, hardly 

 (c?) or very slightly (?) narrower than the interspace between the 

 eyes, slightly depressed around the ocellus, not sulcate, biseriate 

 punctate dorsad ; antennae rather short, defective in the c? , distinctly 

 but not considerably longer than the pronotum in the 9 ; eyes hardly 

 prominent, truncate cephalad, distinctly longer than the infraocular 

 sulcus. Pronotum very slightly inflated, very slightly tectate, meta- 

 zona finely punctate; cephalic margin subtruncate, caudal margin very 

 slightly arcuate, no distinct lateral carinae but shoulder angles moder- 

 ately prominent caudad; prozona slightly longer than the metazona 

 in both sexes, quadrate in the c?, slightly transverse in the 9 , principal 

 transverse sulcus very well marked, median carina more distinct on 

 the metazona than cephalad, but not markedly elevated anywhere 

 in its length; lateral lobes distinctly longer than broad. Tegmina 

 slightly less than the pronotum in length, sublanceolate, twice as long 

 as broad in the c^ , half again as long as broad in the ? , apex narrowly 

 rounded, tegmina well separated dorsad. Abdomen with the apex 

 but little elevated and not at all recurved; furcula about a third the 

 length of the supra-anal plate and distinctly longer than the segment 

 from which they spring, simple, parallel; supra-anal plate produced 

 trigonal, considerably inflated mesad, median sulcation and bordering 

 ridges distinct on the proximal half, the sulcation obsolete distad; 



^* 'Opeiai, in allusion to its habitat. 



