76 



PRELIMINARY LIST 



with rufous throughout and has no black on the propleura. 

 Colorado Springs, August 3d ((iillette). 



Idiocenis lachrymalis Fitch. Det. ^'anUuzee. 



Colorado (VanUuzee, 4). 



Estes Park, July 12th; Steamboat Springs, July 26th; 

 Eist Canon, July 30th (Gillette). 

 Idiocerus inhnicus n. sp. 



Female: Pace one-fifth wider than hing. faintly shagreened; olvpeus a little less 

 than two-thirds longer than broad, moderately broadened at the rounded apex: lorae 

 considerably longer and almost as broad as the 

 clypeus; genae moderately depressed beneath the 

 eyes, lateral margins straight, attaining tip of 

 clypeus, broad beneath lorae; front slightly longer 

 than broad, nearly twice as long as the clypeus. 

 Vertex finely transversely wrinkled, length at 

 middle same as next the eyes; width between the 

 eyes five times the length at middle. Pronotum 

 finely transversely shagreened, a little more than 

 two and one-third times broader than long, three 

 times longer than vertex, curvature little more 

 than two-thirds of the length Scutellum finely 

 shagreened and with the transverse groove as in 

 interrupt us. Last ventral segment as in rufus. 

 Color pale yellowisii brown, unicolorous except two 

 distinct black spots on the crest of the vertex, and 

 the nervuies of wings and basal angles of scutellum 

 rufous. 



Length 4.6 mm. Described from one female. 

 Form of alternjitus but more robust. 



FortColliiiSjAugustlSth on black- 

 walnut (Baker). 



Idiocerus nervatiis Ya.uD. Det. VanDuzee. 



Colorado (VanDuzee, 1). 



Lamar, May 7th; Trinidad, May 

 14th (Gillette). On Redstone Creek, twelve miles south- 

 west of Fort Collin.'?, August 1st; Fort Collins, September 

 14th on Solidago (Baker). The dark nervures of the wings 

 are not a distinguishing characteristic of this species as 

 certain forms of paJlidus also possess them. 

 Idiocerus pallidus Fitch. 



Quite common in Clear Creek Canon, also near the South Platte and its 

 tributaries near Denver, and at Manitou and Colorado Springs, chierty upon 

 willows, August Bth to Ihth (Uhler, 5). Mountains, June (Carpenter— see 

 Uhler, 6). Colorado (A^anDuzee, 4). 



Female: Face an eighth wider than long, finely shagreened; clypeus one-half longer 

 than broad, broadest near the tip wiiere it is suddenly widened, apex rounded and broadly 



