26 TERTIARY RHYNCHOPHOROUS GOLEOPTERA. 



Teretrum primulum. 

 PI. IV, Fig. 3. 



Head very delicately, finely, regularly, and transversely corrugated 

 or carded with a few granulations anteriorly ; rostruin smooth, imperfectly 

 preserved, but evidently very gently curved and nearly as long as the head 

 and prothorax combined. Thorax well arched, with feeble, sparse, but 

 rather coarse granulations. Elytra with feeble distant carinae not well pre- 

 served. 



Length,' excluding rostrum, 3"75'""'; height, 1 '8 """; length of rostrum, 



Florissant, Colorado. One specimen. No. 6377. 



Teretrum quiescitum. 

 PI. VIII, Fig. 6. 



Head obscure but ajjparently rather coarsely granulose, the rostrum of 

 the same character, very gently arcuate, of about the length of the prothorax. 

 Prothorax finely and irregularly rugulose, scarcely arched above. Elytra 

 finely striate and serially granulose, the granulations pretty large. 



Length, excluding rostrum, 2"7""'; height, 1-2°""; length of rostrum, 

 0-fi'""'. 



The head is twisted upside down in the specimen drawn. 



Green river, Wyoming, from the upper part of the blutfs behind the 

 town. One specimen, No. 740, U. S. Greological Survey. 



This insect bears a close general resemblance to the European Cossonus 

 marionii Oust, from the Aix Tertiaries. 



TOXORHYNCHUS (rdf^ov, pv'yxo?), gen. nov. 



The form is very comi)act, the dorsum strongly arched. The head is 

 conical, nearly as long as broad, the eye large, circular or nearly circular, 

 situated at the very base of the snout, the latter delicate, scarcely arcuate, 

 at least as long as the head. Antenna?, obscurely preserved in only a single 

 specimen of one of the species, inserted very near l)ut not at the base of the 

 beak, as long as it, slender, the club composed of subquadi-ate joints not 



