1917] 



Phylogeny of the Elateridce 



251 



The tribe Oestodini is tentatively placed in the first sub- 

 family but undoubtedly is much more widely separated from 

 the other three tribes than these are from each other and, as has 

 already been mentioned, is very similar to the so-called Throscid 

 Drapetes geminatus Say. The larvae (Fig. 5) are distinguished 



Fig. .5. Oestodes tenuicollis Rand, a, dorsal aspect of larva; b ventral asoerf nf 

 head; c, lateral aspect of 8th, 9th and 10th abdom nil segmeSs J 

 ventral aspect of same; e, dorsal aspect of right mandible f lateral 



by the absence of a "nasale," that is to say, the forepart of 

 the tronto-clypeal region is concave instead of being produced 

 into a dentate plate as in all other Elaterid larv^; the man- 

 dibles have a pronounced tooth on the inner edge; and the 



