COLKOPTEBA. 425 



and is also found in the earth. It even appears that the larvae of the 

 E. striatus, Fab., attack the roots of the Wheat, and, where they 

 exist in great numbers, do much injury to it. 



The stomach of the Elaterides is long, transversely rugose, and 

 its posterior portion sometimes inflated ; their intestine is moderate. 



The various subgenera of this tribe may be referred to two prin- 

 cipal divisions. Those where the antenna can be entirely received 

 into the inferior cavities of the thorax constitute the first. 



Sometimes they are received, on each side, into a longitudinal 

 groove, situated directly under the lateral edges of the thorax, and 

 are always filiform and simply serrated. The joints of the tarsi are 

 always entire, without prolongations, and in the form of a palette 

 underneath, The thorax is convex or arched, at least on the sides, 

 and dilates at the posterior angles in the manner of a lobe, pointed 

 or triangular. These Insects approach the Buprestides. 



GALBA, Lat. 



Mandibles terminating in a simple point; maxillae unilobulate 

 last joint of the palpi globular ; the body almost cylindrical *. 



EUCNEMIS, Arh. 



Mandibles bifid ; maxillae bilobate ; last joint of the palpi nearly 

 securiform, and the body almost elliptical f. 



At other times the antennae, occasionally clavate, are received, at 

 least partially, either into the longitudinal grooves of the lateral 

 borders of the praesternum, or into fossulae situated under the pos- 

 terior angles of the thorax. The tarsi are frequently provided with 

 little palettes formed by the prolongation of the inferior pellets, or 

 the penultimate joint is bifid. 



Some, with filiform antennae, have the joints of the tarsi entire 

 and without palettes underneath ; the anterior legs, when contracted, 

 are received into lateral cavities in the inferior surface of the thorax. 

 Such is the 



ADELOCERA, Lat I. 



Others, with antennae also of equal thickness throughout, have 

 the joints of the tarsi entire, but the inferior pellets prolonged or 

 projecting in the manner of little palettes or lobes. Their head is 

 exposed. They form the 



* 1 have seen three species, all from Brazil. One of them has many points of re- 

 semblance to the Afelasis tuberculata, Dolman Anal. Entom. The maxillae termi- 

 nate in a very small and pointed lobe. 



f Count Mannerheim has published a splendid Monograph of this subgenus, an 

 extract from which, with the plates, is found in the third volume of the Annales des 

 Sciences Naturelles, accompanied by some observations from myself on the too great 

 extent given to the subgenus by that author. The species he calls the capvcixvs is in 

 my opinion the only one that belongs to it, and such was the original idea of him 

 who established it. 



|| Elatcr otalis, Germ. ; Elater fuscus. Fab., and some others from the East 

 Indies, collected there by M. de LabUlardiere. 



