382 PROCEEDINGS OF THE ACADEMY OF [Sept., 



typical specimens of it from California .... these are quite distinct, 

 but a good series before me grades into the sulcifrons form. ' ' Speci- 

 mens of behrensi from San Diego and Claremont, California, appear 

 readily separable from the Grand Junction individuals, but these are 

 probably typical specimens. 



This species has a rather wide distribution, having been recorded 

 from Nogales and the Huachuca mountains, southern Arizona, in 

 addition to the type locality and Grand Junction, Colorado. It would 

 thus appear to be an Upper and Lower Sonoran species. 



I took this species on the bare silt along the banks of the Grand 

 river. In this locality it was plentiful and many specimens could 

 easily have been taken as their flight is short and not vigorous. The 

 coloration of the insects is undoubtedly of great protective value. 



TRIMEROTROPIS St&l. 

 Trimerotropis bilobata n. sp. 



T3^pes: c^ and 9 ; Antlers, Mesa Co., Colorado, Aug. 15, 1904. 

 Collected by IMorgan Hebard. [Hebard Collection.] 



Fig. 11. — Trimerotropis bilobata n. SY>. Antlers, Colorado. Lateral \dew of type- 



(X 3.) 



This species is one of a number which might with almost equal 

 propriety be placed in either Conozoa or Trimerotropis, but which we 

 have placed here chiefly because McNeill has considered its allied 

 species as a member of Trimerotropis rather than Conozoa. 



The new form is apparently closely allied to T. rebellis (Saussure) 

 and differs in the absence of a distinct projecting process on the ventro- 

 caudal angle of the pronotum, in the apparently less distinct lateral 



