CURCUrJONIDAE. 479 



Mr. C. V. Riley, who has hatched several specimens of Olido- 

 cephalus laevicollis from the galls of Cynijxs quercus-globulns, 

 informs us that they have a general resemblance to an apterous 

 Cynii)S. 



The other characters of the tribe and genus are as follows : 

 Beak rather stout, straight, nearly as long as the prothorax, 

 subcylindrical, not emarginate at tip ; antennal grooves extend- 

 ing in front of the insertion of the antennjB, converging behind, 

 directed below the eyes, which are distant from the prothorax, 

 rounded, and finely granulated; mandibles of normal form, men- 

 tuin and labial palpi small, gular peduncle narrow, long; antennae 

 inserted about one-third from the ti[) of the beak, scape long, 

 slender, extending to the back part of the eyes; funicle 7-jointed ; 

 first joint stouter but only slightly longer than the second; 2-7 

 gradually a little wider, rounded ; club oval pointed, pubescent, 

 feebly annulated. Prothorax without postocular lobes; proster- 

 num broad, short, not emarginate. Mesosternum very narrow 

 between the coxse, side pieces almost longitudinally divided. 

 Metasternum long, side pieces very narrow. Ventral segments 

 nearly equal, sutures straight, well marked, intercoxal process 

 obtuse, moderately wide. Front coxse rounded, prominent; mid- 

 dle coxa3 rounded, not prominent; hind coxse oval, not extend- 

 ing to the elytral margin. Legs rather long, thighs somewhat 

 clavate, usually toothed; tibiae truncate at tip, not mucronate; 

 articular surface terminal; tarsi dilated, spongy beneath, third 

 joint broader, bilobed ; claws divergent, more or less toothed. 

 Elytra elongate-oval, convex, rounded at tip, entirely concealing 

 the pygidium. 



Two genera occur in our fauna: — 



Beak long anrl slfiiilcr ; mandibles thin ; prosternnm long. Erodiscus. 

 Beak shorter and stouter; mandibles thick; prosternum short. 



Otidocephalus. 



Erodiscus is represented by one species in Florida, perhaps 

 identical with one of the South American forms. Otidocephalus 

 by several species in the Atlantic region and the interior, and 

 one in California. 



Tribe VIII.— MAGDALINI. 



As the preceding tribe differs from all others with the front 

 coxae contiguous by the pedunculate prothorax, so does this 



