COLEQPTERA. 419 



The anterior margin of the labrum is always apparent. The man- 

 dibles are generally crenulated or dentated on the outer side. The 

 tarsial crotchets are unequal. In the 



Chrysophora, Dej. 



The posterior legs of the males are very large, the thighs very 

 thick, the tibiae arcuated and terminated at the inner angle in a stout 

 point(l). 



Rutela, Lat. Rutela, Pelidnota, Mac L. Kirb. Oplognathus, Kirb. 



Mac L. 



No remarkable difference in the proportions of the legs in the two 

 sexes; the mentum almost isometrical; the scutellum small or mode- 

 rate; sternal point short and not reaching to the origin of the two 

 anterior feet. The body is ovoid or oval(2). The 



Maoraspis, Mac L. Cetonia, Fab. 



Differs from Rutela in the proportions of the mentum which is evi- 

 dently longer than it is broad; in the short and rounded form of the 

 body; in the length of the scutellum, which is at least one-third of that 

 of the elytra, and of that of the sternal point, the extremity of which 

 reaches to the origin of the two anterior legs or extends beyond it. 

 The mandibles are almost triangular, and their extremity is pointed 

 and emarginate. The maxillae are furnished with several teeth. 

 The mentum forms an elongated square slightly narrowed near the 

 superior extremity; its superior margin is destitute of cilia. One of 

 the crotchets of the tarsi, at least of the four anterior ones, is bifid, 

 the other entire(3\ 



Chasmodia, Mac Leay. 



The Chasmodiae are similar to the Macraspides in the general form 

 of their body, the proportions of the scutellum and of the sternal 

 point; but the extremity of the narrower mandibles is obtuse and 

 entire; the maxillae have only two teeth and a pencil of hairs, and 

 the mentum is an elongated ovoid narrowed near the superior ex- 



I 



(1) Melolontha chrysochlora, Lat.; Voy. de MM. Humb. and Bonpl., II, xv, 1, 

 fem.; 2, male; Scarabseus macropus, Shaw, Nat. Miscel.,CCCLXXX, iv. 



(2) See Catal. de la Coll., &c, Dej.; Hor<e Entom., I, Mac L. and Encyc. 

 Method., article Rutele. The characters of the genera Pelidnota and Oplognathus 

 do not seem to me sufficiently determined. 



(3) See Catal., &c, Dej.; Hone Entom., I; Ency. Method., art. Rutele. 



