276 RUTELllS'j^. 



i7)ost separated by an acute notch, and the longer claw of the 

 front and middle feet is very minutely cleft at a short distance 

 from the apex. 



c? . The teeth of the front tibia are sharper than in the female. 



Length, 10 mm. ; breadth, 5 mm. 



S. Bombay : Belgaum {H. E. Andreives). 



Type in the British Museum ; co-types in Mr. H. E. Andrewes' 

 collection. 



Division V. ADOKETINI. 



The beetles comprising this division are characterized by their 

 generally small size and dull, unattractive colour, almost invariably 

 pccompauied by a clothing of short hairs or setae above as well as 

 beneath. They are nearly all nocturnal in their habits, destroying 

 the foliage of trees and shrubs, and frequently attracted into houses 

 by light. The group is peculiar to the Old World and confined 

 to tropical or subtropical regions. 



Although there is considerable resemblance between the 

 Adoretini and certain Anomalini, it is quite superficial, lor the 

 structure of the mouth is very different. In the present group 



Fig. 59.— Labniin of: — a, Trigonosfomum ; b, Adoretus; c, Scaphorrkin- 

 adorctus ; d, Prodoretus ; e, FachyrrJiinadoretus. 



the labrum, instead of being simply a horizontal lip roofing the 

 mouth-cavity, is produced downwards in front so as to present a 

 very evident anterior face, which in a few species is rectangular 

 in shape, in others ti-iangular, the apex of the triangle applied to 

 the front edge of the mentnm ; but in the great majority it is 

 much more highly developed, the free lower edge being produced 

 as a long recurved rostrum across the mouth, which it completely 

 divides into two halves, the extremity of the rostrum interlocking 

 with, or lying upon, the front edge of the mentum. The result 

 of this remarkable conformation is that the mandibles, and 

 apparently the maxillae also, are incapable of meeting, as in 

 practically all other insects, but work instead against the right 

 and left sides respectively of the labrum. The whole of the 

 latter is extremely hard, as highly chitinous indeed as the man- 

 dibles, and generally ridged or serrated at the sides, which form 



