90 



PRELIMINARY LIST 



Lensjth 3.35 mm. Described from one female. Distinctly separated from auratus by 

 the last ventral segment ani by the proportions of the head. 



Pleasant Valley, six miles north-west of Fort Collins, June 

 12th (Gillette). 



Deltocephahis vandiizei n. sp. 



Female: Face one-ninth wider tlianlong; 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; gt^nae normal except the outer margin 

 which is strongly obtusely angled, attaining the end of the clypeus. Front as long as 

 wMe, sidi-s below the antermae ra.pidly narrowing to the clypeus, 

 superior angle more than a right angle, obtusely rounded. Face and 

 vertex coarsely shagreensd Disc of vertex slightly convex, sloping 

 tc the margins, length at the middle once and a half that next the 

 eye. Pronotum two and a fourth times wider than long, an eiglitli 

 longer than the vertex, curvature half of the length, posterior margin 

 slighly concave, anterior fourth finely sc;ibrous and elevated, pos- 

 terior three-fourths very finely transversf ly wrinkled, disc witli two 

 small dis'-inct pits near the anterior margin. Scutellum finely sca- 

 brous. Hind margin of last ventral segment with abroad deep median 

 notch, posterior angles rounied. Color dark smoky above, black be- 

 low. Eyes black. Face black, above with a row of transverse light 

 daslies 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 me lian band, produced posteri- 

 orly at tlie sides to near ilie hind margin, running between ocelli and 

 along the margins of the eyes, and two black spots on either side 

 witliin the hind margin near to each otlier, posteriorly a dark median 

 longitudinal line. Ocelli blacl< on a circular yellow field. Pronotum dark yellowish 

 smoky, anteriorly with a black spot near the median line, and laterally, near tlie anterior 

 margin, two elongate black daslies. Scutellum with a median spot and two spots witliin 

 tlie basal angles black, extreme posterior point jet black. Elytra smoky, nervures 

 lighter, narrowly margined with darker. Venter black. Legs black, extreme tips of 

 CDxae. 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 tlie 

 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 3..jmm. Described from one 

 male and one female. Near weedi. 



Leadville, August 24th (Gillette). 



