1910.] NATURAL SCIENCES OF PHILADELPHIA. 13 



differences; but inasmuch as the specimens show considerable indi- 

 vidual variation in themselves, it appears preferable to regard the 

 material in hand as validus, at least until further information is avail- 

 able. 



Conozoa wallula Scudder. 



One female. July 25. 

 Trimerotropis rebellis Saussure. 



Two males, one female. One dated July 25. 



These specimens fully agree with the original description of the 

 species which was described from California. Rehn and Hebard's 

 T. bilobata is the closest relative of this species, differing, however, in 

 the characters given in the diagnosis of their species. 



Trimerotropis gracilis (Thomas). 



One female. 



This species has been recorded from Birch Creek, Idaho. 



Trimerotropis arenaceus n. sp. 



Types : cT and 9 ; Springfield, Bingham County, Idaho. July 25, 

 1906. (Henry Skinner) [Acad. Nat. Sci. Phila,] 



Related to T. albolineata Bruner and T. cristata McNeill, with 

 specimens of both of which it has been compared, differing from both 

 in the more robust build, the glaucous caudal tibiae and the suppression 

 of the dark dorsal bar on the entire length of the lateral lobes of the 

 pronotum. The general color is much like that of Trimerotropis 

 maritima interior, but the pronotal crest is very much more decided 

 than in that race. 



Size slightly less than the average for the genus ; 

 form moderately slender; surface of the body more 

 or less distinctly punctate except for the glab- 

 rous venter of the thorax and abdomen. Head 

 with the occiput and interocular region strongly 

 arcuate and distinctly elevated dorsad of the 

 disk of the pronotum, the interspace between the 

 eyes being hardly (d 1 ) or distinctly (?) broader Fig. 1.— Trimerotro- 



than twice the width of the basal antennal joint; ^ s a J' er ^ ace ^ s n - 



" sp. Lateral out- 



fastigium nearly half again as long as broad, line of head and 



decidedly excavate with a low medio-longitudinal pronotum of male 



. . type. ( x 3.) 



carina, lateral carina) well elevated, the depression 



extending caudad to between the eyes and not markedly delimited from 



the occiput, cephalad separated more or lass distinctly by a V-shaped 



carina from the frontal costa; lateral forveolse distinct, impressed, tri- 



