INTRODUCTION. 



and CETONiiN'iE. The present subfamily and the MelolonthiNjE 

 and HoPLiiN^ are the pre-eminently leat'-feediug gronps of 

 Lainellicornia, and in these, although in different ways, we find a 

 special tendency to depart from the primitive simple form of 

 claw-strncture. In the Melolonthin^ and Hopliinje an even 

 more highly modified structure may be observed, but the great 

 n)obility found in the Ruteline claw does not occur there and, 

 Avirh a few exceptions, the claws of all the feet are alike. In the 

 present group those of the first, second, and third pairs of legs 



Fig. 2. — Tarsal claws: — a, claws of Propomacriis (Euchirina) ; b, hind claws 

 oi Anomala dorsalis ; c, front claws of Auomala dorsalis, male; d, ditto, 

 female ; e, front claws of Adoretvs suttiralis, female ; f, hind claws of 

 Adorefus suttiralis, male ; g, middle claws of A. sicturalis, male. 



may all show some difference and are rarely all alike, the hind- 

 most pair, and sometimes the two hinder pairs, commonly having 

 a simpler form of claw than the others, that is, the larger one of 

 the two claws is less often cleft at the tip. The outer claw of 

 the four posterior feet, and the inner one of the front feet, are 

 always longer than the others, and it is the longer claw alone 

 which tends to bifurcation. The meaning of the varied forms 

 and combinations in which this bifurcation is found is less obvious 



