WICKHAM: NEW MIOCENE COLEOPTERA FROM FLORISSANT. 443 



bluntly pointed, sculpture a distinct but not coarse scabrous punctua- 

 tion, vestiture fine. Legs not preserved. Length, 7 mm. 



Described from one specimen. 



Type. No. 2,485 M. C. Z. Florissant, Col. (No. 5,359 S. H. 

 Scudder Coll.). 



Very few of the Florissant fossils are so well preserved as this little 

 buprestid. It is a remarkably satisfactory agrilid type and exhibits 

 many of the characters used in our tables for the separation of recent 

 species of this genus. By comparison with specimens of the common 

 living North American Agrilus politus, the fossil is so nearly identical 

 as to be separable with difficulty. It is entirely within the bounds of 

 possibility that A. praepolitus infested the willows of the ancient lake 

 shore. 



LAMPYRIDAE. 

 MIOCAENIA, gen. nov. 



Form of Caenia but the pectinations of the antennae are apical in 

 origin instead of basal. 



Type. M. pectinicornis, sp. nov. 



MIOCAENIA PECTINICORNIS, sp. nov. 

 Plate 6, fig. 1-2. 



Body elongate, subparallel. Head small, eyes destroyed. An- 

 tennae two thirds the length of the entire body, the joints external to 

 the second rather strongly pectinate except the last which is simple. 

 Prothorax small, not projecting over the head. Elytra long, sculp- 

 ture obscure. Legs wanting. Length, 6.15 mm. 



Described from one specimen. 



Type. No. 2,486 M. C. Z. Florissant, Col. (No. 6,994 S. H. 

 Scudder Coll.). 



Superficially this insect looks very much like Caenia dimidiata of 

 our eastern and northern states, but the structure of the antennae is 

 different. The European genus Drilus approaches it in this respect, 

 but has a different body form. In the lack of knowledge of a recent 

 genus which will acceptably receive the fossil, I have proposed a new 

 name. 



