86 
PRELIMINARY LIST 
sides rectilinear, gradually narrowed towards theclypeus, superior angle rather long, and 
more than a right angle. Face and vertex finely 
shagreened. Disc of vertex with two distinct pits near 
the eyes, nearer to the eyes than to each other, length 
at middle a half longer than that next the eye, width 
between the eyes equal to the length at middle. Pro- 
notum twice as wide as long, one-seventh longer than 
the vertex, curvature four-ninths of the length, pos¬ 
terior margin very slightly concave, anterior one- 
fourth glabrous, posterior three-fourths transversely 
subobsoletely wrinkled and with scattered indistinct 
punctures. Scutellum broader than long, shagreened 
more coarsely than the face. Last ventral segment 
with the hind margin broadly and deeply notched, the 
sides of the notch slightly sinuated. Color ashy gray 
sometimes tinged with fuscous. Face light yellow to 
dusky, the sutures sometimes darker. Two broad dark longitudinal lines extending over 
vertex and pronotum, these bands on the anterior two-thirds of vertex bordered inter¬ 
nally with black, and adjoined externally by a black spot. Vertex with a fine 
black median line on the posterior two-thirds. Scutellum varying from brown-marked 
to black. Elytra little longer than the abdomen, whitish, nervures white throughout 
bordered with dusky or testaceous, apex with three black spots, one internally and twe 
externally, each elytron with seven white spots, two on the external apical border, two in 
the center, one large one basally and two on the internal border of the clavus. Venter light 
to dark yellow, sometimes bordered with blackish, the last segment with black spots on 
the sides of the notch. Legs yellow, tibial spurs arising from black spots, posterior tibiae 
black tipped internally. 
Length of female 4 mm., of male 3.6 to 3.76 mm. Described from four males and three 
females. 
Steamboat Springs, July 12th on Carex (Baker). 
Deltocephaliis himaciilatus n. sp. 
Female: Face about as long as wide; clypeus short and broad, one-seventh longer 
than broad, not quite half as long as the front, gradually narrowing towards the rounded 
apex, basal suture straight; lorae subovate, two-fifths as wide and nearly as long as the 
clypeus; genae broadly.rounded outwardly, attaining the end of the clypeus; front one- 
eighth longer than wide, sides almost 
straight, superior angle nearly a right 
angle. Face and vertex roughly sha¬ 
greened. Disc of vertex slightly trans¬ 
versely depressed, length at middle once 
and a half that next the eye, width be¬ 
tween eyes once and two-sevenths the 
length at middle, Pronotum two times 
wider than long, length slightly less than 
that of vertex, curvature nearly one-half 
of length, posterior margin very slightly 
concave, anterior fourth glabrous, pos¬ 
terior three-fourths very finely trans¬ 
versely wrinkled. Hind margin of last 
ventral segment with a broad short tooth, 
on either side of which is a shallow notch _ 
rflvetLTvlt sutures blacTfour 
form-n/ „ ^ front above, which may run together 
ors oLhe anS ne™ Vertex with two lalge oval black 
bis VeLtr w greenish, subhyallne. Tergum 
black nvvnfe..*^* upleal margins of segments yellowish. Ovipositor 
LZ mlZT ” with black longitudinally. Legs light yellow 
somSnecirnS » f * T 'ollows: Front without black markings except la 
b specimens a spot on either side beneath antennae. Front two and a half times as 
