CALANDRIDAS—COSSONIN #®—DRYOPHTHORINI. 153 
becoming converted into fine carinz, giving it a combed appearance; the 
constriction consists of a deeper but fine sulcation, which is farther from the 
beak above than below; the prothorax is more coarsely, very closely, and 
uniformly granulate, becoming finely rugulose anteriorly on the lower 
sides; the elytra are ridged, but not heavily, and also transversely subrugu- 
jose and rather finely and sparsely punctate. 
Length, excluding beak, 5-4™"; length of beak, 1:35"; height of 
body, shen”: 
Florissant, Colorado. Two specimens, Nos. 6915, 11310 and 13673. 
LITHOPHTHORUS (Az6os, pGe/p@), gen. nov. 
A genus of Dryophthorini, remarkable for the small number of joints 
in the funicle of the antennze, there being but two or at most three, while 
no living Cossoninze appear to have less than four. It has much the general 
aspect of a Gononotus, but with a shorter and straighter rostrum, and no 
rounded protuberances on the prothorax, though the sculpturing is in gen- 
eral similar. Head very short; the beak is about two-thirds as long as the 
prothorax, pretty stout and scarcely curved, with a transverse ridge just 
behind the eyes; these are small, superior, as high as the width of the mid- 
dle of the beak, with a nearly straight posterior margin; antennze inserted 
somewhat before the middle of the beak, the scape slender but enlarged at 
tip to nearly double its previous size, long enough just to fail of reaching 
the eyes; funicle shorter than the scape, composed of only two or at most 
three obovate joints, the club long oval, slender, composed of three joints, 
the last minute. Prothorax coarsely sculptured but even, except for some 
narrow, sinuate, lateral, longitudinal carinz, as in Gononotus. Elytra 
apparently subcostate. Middle and hind cox both equally and widely 
separated. Mesosternum not very short, side pieces narrow. Abdominal 
segments exactly as in Gononotus. 
A single species has occurred, very large for a member of this tribe, 
at Florissant. 
