258 SEERICOENIA. 



Fam. ELATERID-ffi*. 



In dealing with the Central-American species of Elateridae, I follow in the main the 

 classification of Dr. E. Candeze, who for forty years has made these insects his special 

 study. 



Any departures from his system will be mentioned as they occur, and all general 

 remarks will be found in the ' Introduction ' to this Volume. 



Group AGRYPNINI. 



ADELOCERA. 



Adelocera, Latreille, Regne Anim. iv. p. 451 (1829) ; Candeze, Monogr. Elat. i. p. 47; Revis. Elat. 

 p. 14. 



Of the sixty-four described species of Adelocera, one half inhabit the New World, 

 the genus ranging from high northern latitudes to the tropics. In the typical species 

 (as in DiloUtarsus) the prosternal grooves are very deep throughout and extend nearly 

 to the anterior coxal cavities, thus forming a complete channel for the reception of the 

 antennae when longitudinally extended backwards ; but in the three new species here 

 described these grooves are shorter (though longer than in Lacon) and do not receive 

 the whole of the antennae in repose. The antennae are usually serrate in both sexes, 

 but are sometimes pectinate in the male ; in some species they are more thickly pilose 

 on the inner edge in the males than in the females. In addition to the nine species 

 here enumerated from within our limits, one other, the widely-distributed A. modesta, 

 Boisd. (=pruinosa and squalida, Fairm.), is given by Candeze (Monogr. Elat. i. p. 72) 

 as from Guatemala ; but it is highly probable that there is some mistake about this 

 locality f. 



These insects are all found under the bark of trees, the more northern species beneath 

 that of pines. Our species (two of which are known to me from description only) may 

 be identified by the annexed table : — 



Prosternal grooves extending almost to the anterior coxal cavities, entire, very deep 

 throughout ; antennae serrate in both sexes, short. 

 Elytral punctures not forming distinct striae. 



Hind angles of the prothorax not carinate cceca. 



Hind angles of the prothorax carinate mixta. 



* By CJ. C. Champion. 



t In the Janson collection there are two specimens of this species labelled as from " Vera Cruz, Mexico, ex 

 Laferte ; " this statement equally requires confirmation. 



