SCARABiElDAE. 249 



ring, but is not connate with it, as in the genuine Melolouthiiue- 

 the sixth 'central is somewhat triaugular, and unites with the 

 pygidium to form a IVeely moving conical niu.ss. The cpimera 

 of the mesothorax are very large; the nietasternuni is sliort; the 

 side pieces broad, with the epiniera large ; the anterior coxsb are 

 large, prominent; the middle ones transverse, contiguous; claws 

 long, diverging. Antenna with 3-jointed club. 



The legs and tarsi of these insects are formed as in other Me- 

 lolonthidse, and the claws are slightly toothed at base, or simple. 



Two genera have been described from the United States, Lich- 

 nanthe and Daaydera, but they do not seem suflSciently distinct 

 from the European Amphicoma. 



Tribe II.— OIVCERIIVB. 



This tribe corresponds with the group Lasiopodes of the 

 synopsis of Melolonthina?.* Its characters are very distinct, as 

 follows: — 



Anterior coxa3 large, prominent, conical; mandibles and labrum 

 beneath the reflexed clypeus; antennae 0-jointed, short; club small, 

 3-jointed ; abdomen very small, with the ventral sutures entirely 

 eifaced, last segment free, conical; pygidium slightly prominent; 

 elytra rounded at tip; epimera of mesothorax small, extending to 

 the coxjB ; side pieces of metathorax narrow, epimera covered ; 

 legs stout, posterior thigl s large; tibiae thick, conical; tarsi very 

 long; claws diverging, slender, with a small bisetose onychium; 

 front tibiae without spurs, posterior tibial with two spurs. 



Clypeus concave, rounded ; mentum linear ; claws simple. Podolasia. 

 Clypeus flattened, finely margined ; claws cleft ; mentum elongate, trape- 

 zoidal. 

 Clypeus incised each side in front, with a transverse suture in front 

 of the eyes. Oncerus. 



Clypeus not incised, frontal suture indistinct. Chnaunanthus. 



Podolasia is found in Texas, Oncerus in California, Chnaunan- 

 thus in Arizona and ITtah. They are the smallest Melolonthidae 

 known, and live on flowers. Oncerus resembles in form the 

 European Chasniatoptcrus, l)ut the clypeus is double as in Di- 

 phucrania. Podolasia exactly resembles in appearance Aclopua 

 Er., which, however, has the labrum and mandibles porrected as 

 in the preceding tribe. 



* Journ. Acad. Nat. Sci., 2d aer., iii. 282. 



