518 BULLETIN: MUSEUM OF COMPARATIVE ZOOLOGY. 
~ Described from one specimen. 
Type.— In the Museum of the University of Colorado. It was col- 
lected at Station 14, Florissant, Colo., by G. N. Rohwer, while a 
member of one of Professor Cockerell’s parties. 
Separates from L. florissantensis, with which it agrees in the rela- 
tively coarse interstitial punctuation, by having a much finer and 
sparser sculpture of the head and particularly of the thorax. The 
generic reference is provisional, being based mostly on facies. 
ATHOUS LETHALIS, sp. nov. 
Plate’ 6;* fig? 1,2: 
Form elongate, parallel. Head finely and extremely densely punc- 
tured and with a short pubescence. Antennae long, slender, faintly 
serrate, apparently not entire but reaching far beyond the prothoracic 
hind angles, basal joits too poor to allow of their definition. Pro- 
thorax punctured similarly to the head but a trifle more coarsely and 
less deeply, length and breadth equal, front angles slightly prominent, 
sides nearly straight to the hind angles which are acute and alittle 
divergent, base sinuate each side. Scutellum oblong oval. Elytra 
a little over three times the length of the prothoracic median line, 
apices conjointly rounded, finely striate and pubescent, the striae with 
small, deep, nearly circular or slightly elongate punctures which are 
separated in the series by their own diameters or something more. 
Underside of prosternum closely and finely punctured, the prothoracic 
flanks less strongly, sculpture of the remainder of the thoracic scle- 
rites and abdomen very obscure. Length, from front margin of pro- 
thorax to elytral tip, 8.40 mm.; of elytron, 5.50 mm. 
Described from one specimen, with counterpart. 
Type.— No. 2,728 and 2,729 M. C. Z. Florissant, Colo. (No. 8,464 
and 8,713 S. H. Seudder Coll.). 
The prothorax is ornamented with a broad brown stripe, about one 
third of the discal width, occupying the median area from base to 
apex, similar to that seen in the recent A. excavatus, from California. 
The latter insect, however, is much more coarsely sculptured. The 
coxal plates are not well displayed in the fossil, but the prosternal 
lobe and sutures, as well as the general form, correspond well with 
the genus in which I have placed it. 
