156 TEETIAEY EHYlSCHOrHOROlTS COLEOrTEEA. 



-thonix but less pronounced; eyes small, liroad oval, l(\ss tlian half as long- 

 as the l)rejidtli of the beak, transverse, set tar back ; lieak somewhat lonj^er 

 than the head, somewhat mon^ than twice as long as broad. Prothora.x 

 scarcely so knig as high, not arched, coarsely and rather faintly punctate. 

 Elytra not arched, poorly preserved but a}iparently shallowly striate, cover- 

 ing the pygidium. Femora rather sh^nihr, rather longer than the snout. 

 Length exclusive of beak, a-o""": height, 0-75"""; length of rostrum, 



0-r)""". 



Florissant, Colorado. One specimen, No. 2311. 



This species resembles in general form, ])ro])ortions and size our C. 

 imprcss'ifrons Boh. 



Named in memory' of an industrious geologist and paleontologist, the 

 late Mr. W. M. Gabb. 



Family SCOL^^TID^E. 



No famih' of L'hvnchojjiiora is so mucJi more ])oorly re))resented in 

 Tertiarv deposits than in the living tauna as the present. This must doirbt- 

 less be accounted for in large measui-c b\ the habits of these insects, living 

 as thev do beneath the bark of trees, and therefore less exposed than the 

 members of the other families to such accidents as woidd precipitate them 

 to the bottom of lakes and p(mds. In our own countr^' they fonn less than 

 3 per cent of the Tertiarv Khvnchophorous fauna, while in the existing 

 fauna they compose more than to j)er cent of the whole. The Platypodinae 

 are represented in the Euro])ea-n IVrtiaries by a couple of amber species 

 of l*lat\pus, l)ut arc not found in our rocks, while the Scolytiujc have the 

 meao'ci- ami c(iiial number of live species in the Tertiary de})Osits of either 

 continent. 



Subfamily SCOLYTIN.^. 



Of the three tribes into which the modern American species of this sub- 

 family arc divided, the least important, the Scolytini. have not been found 

 I'nssil in .Vmcrica, though a species of Scolytus was recognized by Serres at 

 Aix, in Provence. On the othei- liand, the Toniicini, relatively and aljso- 



