1878.] 605 [LeConte. 
finely punctulate, sparsely at middle, more densely at the sides. Legs 
nearly black. Length .20 inch ; 5mm. 
In addition to the short black pubescence clothing the elytra there are very 
narrow sinuous bands of grayish pubescence, the first at basal third, the 
second behind the middle, and also an apical spot. The median band di- 
vides near the middle of each elytra and sends one branch forward, another 
backward to the margin. When the pubescence of the bands is removed 
the surface beneath is somewhat paler. 
The punctuation of the surface of the thorax varies somewhat. Ina 
specimen from Marquette, Mich., the entire surface of the thorax is as 
coarsely punctured as at the sides, and the elytral sculpture also stronger. 
In addition to the anterior tarsi being three-jointed, the male has a tuft 
of silken hairs arising from an arcuate line at the middle of the first ventral 
segment. 
Occurs from the White Mountains of New Hampshire to 
Michigan, Colorado and British Columbia. 
31. M. confusus Horn, n. sp. 
Oval, piceous, sparsely pubescent, elytra maculate with yellow. Head 
densely punctured. Antenne as long as head and thorax, outer four 
joints stouter. Thorax transverse, arcuately narrowed from base to apex, 
surface densely and coarsely punctured, basal impressions moderately 
deep, margin not serrulate. Elytra densely punctulate with a feebly striate 
arrangement at middle near the base, color piceous, maculate with large 
yeliow spots as in flerwosus, the posterior band, however, not attaining the 
apex. Body beneath and legs rufo-piceous, prosternum sparsely punctate, 
abdomen densely punctate. Length .18 inch ; 4.5 mm. 
One 2 specimen, Colorado, Morrison. 
32. Diploceelus angusticollis Horn, vu. sp. Oblong-oval, piceous, 
moderately shining, sparsely pubescent. Head coarsely and moderately 
densely punctured. Thorax trapezoidal, narrowed in front, sides very 
feebly arcuate, hind angles suddenly broader covering the base of the ely- 
tra, surface coarsely and deeply punctured, with three feebly elevated 
lines at the sides which are less distinct in front. Elytra oblong-oval, 
with rows of coarse closely placed punctures, intervals with a single row 
of fine punctures, surface sparsely clothed with fine recumbent pubescence, 
with short, semi-erect, stouter hairs arising from the interstitial nunctures, 
Abdomen alutaceous, sparsely punctate and finely pubescent. Length 
-13inch ; 3.25 mm. 
This is the only species described with the thorax much narrowed in 
front. Its aspect is somewhat that of a Zhroscus. 
One specimen, Marquette, Mich. 
It seems to methat the opinion of Mr. Reitter is correct 
that Marginus does not appear to be sufficiently distinct 
