1910.] NATURAL SCIENCES OF PHILADELPHIA. 421 



length ; costal margin gently arcuate, costal field narrow, subpunctate. 

 Wings with three to five complete and three to four incomplete rami 

 to ulnar vein. Supra-anal plate truncate distad, laterad obliquely 

 concavo-emarginate, rounding into distal margin, greatest (proximal) 

 exposed width almost twice greatest exposed length; cerci depressed 

 fusiform. 



General color varying from tawny-ochraceous to prout's brown, uni- 

 form dorsad except for pale costal field of tegmina; venter more mars 

 brown, becoming bistre distad on abdomen; eyes clove brown, supra- 

 antennal spots pale yellow ; wings slightly washed with clay color. 



9. Size small; form elliptical-ovate, moderately depressed; surface 

 subglabrous. Head but slightly projecting cephalad of cephalic 

 margin of pronotum; interspace between eyes greater than that 

 between antennal scrobes; antennae distinctly longer than body. 

 Pronotum semicircular, cephalic and lateral margins regularly arcuate, 

 caudal margin subtruncate, moderately arcuate in transverse section, 

 disk with no oblique sulci. Tegmina short, hardly exceeding caudal 

 margin of mesonotum, subacuminate, lobiform, separated by an 

 interspace equal to one and one-half times width of single tegmen, 

 apex bluntly rounded; costal field very broad proportionately, 

 punctate. Wings absent. Supra-anal plate trigonal, sub-produced, 

 slightly sinuate laterad, apex moderately acute; cerci rather short, 

 stout, fusiform, depressed, internal margin more arcuate excised 

 proximad than external margin. 



General color uniform, varying in shade from burnt umber to seal 

 brown, limbs very slightly paler. 



Measurements. — d\ Length of body 13.5-14.5 mm.; length of 

 pronotum 3-3.3; greatest width of pronotum 3.5-4; length of tegmen 

 13.2-16; greatest width of tegmen 4.2-5. 



9 . Length of body 10-11 mm. ; length of pronotum 2.9-3.5; greatest 

 width of pronotum 4-4.8; length of tegmen 1.5-1.9; greatest width of 

 tegmen 1.5-1.6. 



Distribution. — The published records and the material in hand show 



that the present species ranges from Oregon 



(no specific locality known) to Lower California 



(no specific data), extending east to Ormsby 



County, Nevada, and the lower Colorado Vallev Fi S s - J and 



J ' ; . . " noptera amencana 



(Ehrenberg, Arizona). Its maximum vertical (Scudder). Supra- 



elevation seems to be reached in Ormsby rw!£ at Li c \, and 



. ¥ (X7). Male;Pasa- 



County, Nevada. Nothing is known regarding dena, Cal.: female; 

 the habits of the species. The available dates Humboldt County, 

 are in June, July and August. 



