of Buprestidee and Elateride. 197 
The first type is met with in those Elateride of which the 
larve hunt in the fields, under leaves and moss, in meadows or 
in decaying wood. The care of the offspring is here so slight 
that the beetle has time for running about to seek food for it- 
self; and as this consists of pollen, the mouth resembles not a 
little that of those Cerambycidz which feed on the same sub- 
stance, particularly Lepturini. The labrum protrudes, covering 
the mouth from above. The mandibles are triangular, gradu- 
ally pointed and arched, of no considerable strength, with small 
socket and condyle; the joint is cleft into two sharp teeth, one 
above the other; the whole inner margin is arched, and presents 
a sharp edge with a marginal fringe. The maxillary lobes are 
large, particularly the outer one; their skin is thin, and their 
edge covered by a close beard. The mentum is short and thin ; 
the stipites of the labial palpi long, very moveable; the lingua 
large, broad, and bifid, with thin skin, and the margin closely 
fringed with hair, the stipes narrow and strong; the terminal 
joint of the palpi almost always subsecuriform, with a large 
palparium. This is the structure of the mouth in the group of 
Elaterini. 
The other type, which is almost exclusively governed with 
regard to the propagation of the species, is met with in those 
Elateride which, as larve, hunt in more confined localities, 
particularly in galleries in wood. The care of the eggs, together 
with the considerable labour which may fall to their lot in order 
to get out of the timber, leaves very little time for the beetles 
to seek food for themselves ; and according to the greater or less 
preponderance of these considerations, two modifications of this 
type are developed, of which one is analogous to that of Callidiini 
amongst Cerambycide, the other to that of Asemini and Prionini 
in the same family. 
The first of these modifications characterizes the group of 
Euenemidini, and differs less considerably from the structure 
of Elaterini. The labrum is more or less obsolete. The man- 
dibles are very powerful, and still furnished with an edge; but 
it is more or less clumsy and thick, and is without any fringe ; 
the socket and condyle are large, the point sometimes entire, 
sometimes divided into two or more sharp teeth. The other two 
pairs of buccal organs are very small in proportion. Maxillary 
lobes and lingua considerably shortened, and rather to be de- 
scribed as covered with fine hair than as being provided with a 
marginal beard. The terminal joint of the palpi is of propor- 
tionally enormous size, broad, and securiform, with very large 
palparium. 
In the second subtype, characteristic of the group Melasini, 
the labrum has entirely disappeared; the mandibles are of 
