12 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.64, 



usual in the genus, without ridges, the basitarsi about as long as the 

 next two joints together. 



Horizon and locality. — Green River Eocene of Roan Mountains, 

 Colorado, July, 1922, at Station 2, at head of Salt Wash. 



H olotype.— Cdit. No. 69183, U.S.N.M. 



This little species looks like a M ordellistena., but the hind legs 

 are very well shown, and are as in Mordella. It is the first Eocene 

 Mordellid, the oldest members of the family hitherto known being 

 from Baltic Amber. It is interesting to find such a well-marked and 

 specialized family of beetles in the Eocene ; one more indication that 

 the families of insects were at least nearly all developed prior to 

 the Tertiary. Wickham has described no less than eight species of 

 Mordellidae from the Miocene of Florissant, but no others have 

 hitherto been found fossil in America. 



Family MELANDRYIDAE. 



CICINDELOPSIS EOPHILUS Cockereil. 



Dr. Walther Horn, of Berlin, the well-known specialist in Cicin- 

 delidae, wrote that he could not place Cicindelopsis in that family. 

 I accordingly requested Herbert S. Barber to look at the fossil, which 

 he very kindly did, and in his opinion it should be associated with 

 the Melandryidae, somewhere in the vicinity of Prothalpla LeContc. 

 The family is new to the American Eocene, but a single species of 

 Synchroa has been found in the Miocene of Florissant. The generic 

 name, which merely indicates resemblance to Oicin/iela, is still 

 appropriate. 



Mr. Barber was able to remove a fragment of the matrix from 

 over the base of the elytron, and decided that the humeral obliquity 

 was mistaken by me for the scutellar emargination, so that the speci- 

 men is a left instead of right elytron. 



Family CERAMBYCIDAE. 



CLYTUS (?) PERVETUSTUS (Cockereil). 



Plate 1, fig. 3. 



Described as Lema (?) pervetusta Cockereil." 



Another specimen ; Green River Eocene, above rich shale in Camp 

 Gulch, Colorado (Winchester, 17-8), showing the whole elytron, 

 which is 9 mm. long, with four pale transverse bands, the second 

 oblique, the others transverse, except that the fourth has its outer 

 half oblique. This can not be a Lema; it may possibly be a Longi- 

 corn allied to Leptura., but at present I find no genus in which it may 



» Proc. U. S. Nat. Mus., vol. 57, 1920, p. 256. 



