90 
PRELIMINARY LIST 
Front as long as 
Length 3.25 mm. Described from one female. Distinctly separated from auratus by 
the last ventral segment and by the proportions of the head. 
Pleasant Valley, six miles north-west of Fort Collins, June 
12th (Gillette). 
Deltocephalus vanduzei n. sp. 
Female: Face one-ninth wider than long; clypeus two-fifths longer than broad, three- 
fifths the length of the front, gradually narrowing to a rounded apex; lorae subovate 
nearly as long ana two-thirds as wide as clypeus; genae normal except the outer margin 
which is strongly obtusely angled, attaining the end of the clypeus. 
wide, sides below the antennae rapidly narrowing to the clypeus, 
superior angle more than a right angle, obtusely rounded. Face and 
vertex coarsely shagreened. Disc of vertex slightly convex, sloping 
to the margins, length at the middle once and a half that next the 
eye. Pronotum two and a fourth times wider than long, an eighth 
longer than the vertex, curvature half of the length, posterior margin 
slighly concave, anterior fourth finely scabrous and elevated, pos¬ 
terior three-fourths very finely transversely wrinkled, disc with two 
small distinct pits near the anterior margin. Scutellum finely sca¬ 
brous. Hind margin of last ventral segment with a broad deep median 
notch, posterior angles rounded. Color dark smoky above, black be¬ 
low. Eyes black. Face black, above with a row of transverse light 
dashes on either side, genae mostly margined with yellowish. Vertex 
yellow with two large black spots behind the apex which is margined 
with black, a broad black transverse median band, produced posteri¬ 
orly at the sides to near the hind margin, running between ocelli and 
along the margins of the eyes, and two black spots on either side 
within the hind margin near to each other, posteriorly a dark median 
longitudinal line. Ocelli black on a circular yellow field. Pronotum dark yellowish 
smoky, anteriorly with a black spot near the median line, and laterally, near the anterior 
margin, two elongate black dashes. Scutellum with a median spot and two spots within 
the basal angles black, extreme posterior point jet black. Elytra smoky, nervures 
lighter, narrowly margined with darker. Venter black. Legs black, extreme tips of 
coxae, distal half of anterior and extreme tips of middle and posterior femora yellow, 
anterior tibiae yellow, infuscated; middle tibiae yellow annulate with black, hind tibiae 
black with spines yellow, tarsi all dark. 
Male: Differs from female as follows:—Clypeus somewhat longer. Yellow markings 
on the face much heavier, a small yellow spot on the median line of the front near the 
clypeus, also two on the clypeus near the basal angles. The parts of the transverse band 
near the apex of the vertex of the female are here separated as two large rectangular black 
spots. 
Length of female, slightly exceeding 2.5 mm., of male 2.5mm. Described from one 
male and one female. Near weedi. 
Leadville, August 24th (Gillette). 
