488 CLASS INSECTA. 



of the tarsi are dilated and tooth-formed in the males. 

 These insects otherwise resemble Amphicoma.* 



The others have the labrum and mandibles covered, or not 

 projecting, and some, at least, of the hooks of their tarsi are 

 bifid. The chin is elongated and hairy. 



Sometimes all the tarsi have two honks. The antennae 

 have never more than nine articulations. The hood is usually 

 transverse. The palpi are but little elongated, with the last 

 articulation ovaliform. 



Sometimes the posterior feet differ but little from the 

 others. 



Chasmopterus, Dej. Melolontha, Illig., 

 Have all the hooks of the tarsi bifid ; the terminal lobe of 

 the jaws strait, elongated, Avith two teeth wide apart at the 

 internal edge ; the body almost ovaliform, with the corslet 

 rounded, and the elytra of equal breadth throughout. 



Chasme, Lepel. and Serv., 



Do not appear to differ from chasmopterus but in the 

 crotchets of the two posterior tarsi, of which the thickest 

 alone is bifid. 



Sometimes the posterior feet have, at least in the males, 

 the thighs very thick, denticulated, and the legs thick, and 

 terminated by a very strong hook. 



DiCHELEs, Lepel. and Serv. Melolontha, Fab. Oliv. 



The body is short, but little hairy, with the elytra nar- 

 rowed towards their extremity in an elongated triangle. The 

 posterior feet are in part contractile. All the hooks of the 

 tarsi are equal and bifid. The terminal lobe of the jaws is 



• Amphicoma abdoininalis, Latr. Gen. Crust.etlnsect.il. p. 119; M. 

 Afpina, Oliv. Col. I. 5. X. lis. 



