80 
PRELIMINARY LIST 
spots on either side near anterior edge, nearer to the compound eyes than to the median 
line. 
Length of female 6 mm., of male 5 mm. Described from three females and two males. 
Readily distinguished from pallidus by the two black spots on the vertex. 
Idiocenis nifus n. sp. 
Female: Face one-fifth wider than long, finely shagreened; clypeus little less chan 
one-half longer than broad, broadened towards 
the rounded tip; lorae a little longer and 
nearly as broad as the clypeus; genae slightly 
depressed beneath the eyes, the lateral margins 
almost straight, attaining the tip of the clypeus, 
broad beneath the lorae; front about one-fifth 
longer than broad and twice the length of the cly¬ 
peus. Vertex finely transversely wrinkled, length 
at the middle the same as at the eyes, width between 
the eyes nearly four times the length at the middle. 
Pronotum finely transversely shagreened, with 
numerous shallow, scattered punctures, slightly 
more than twice as broad as long, two and one-half 
times as long as the vertex, curvature slightly less 
than three-fifths of the length. Scutellum finely 
shagreened, transverse groove as in interruptus. 
Last ventral segment with hind margin broadly 
rounded, with a narrow median notch. Color bright 
chestnut, with the face, three small spots either 
side of the pronotum, a few spots on the scutellum, 
venter and all below, except the pygofers and some¬ 
times the legs light yellowish. 
Length 6 mm. Described from two females. 
Form of alternatus. 
Eiet Canon, September 27th on 
Solidago; Manitou, September 29th 
on oak (Gillette). 
Colorado Springs, August (Tucker). 
Idiocenis siituralis Fitch. Det. YanDuzee. 
Colorado (YanDuzee, 4). 
Spring Canon, June 30th; Estes Park, .Inly 12th; Steam¬ 
boat Springs, July 26th (Gillette). Steamboat Springs, July 
12th (Baker). Manitou, July (Tucker). 
Idiocenis vertieis Say. 
Upon willows at Denver, August 9th to 18th (Uhler, 5). Colorado (Yan¬ 
Duzee, 4). 
Estes Park, July 12th (Gillette). 
Agallia novella Say. 
Colorado (VanDuzee, 4). 
Agallia 4 -punctata Prov. 
Fort Collins, June 4th to 14th (Gillette). 
Det. Gillette. 
