434 INSECTA. 



The second division, Goliuthides, is distinguished from the pre- 

 ceding by the mentum, which is much longer, wider, and covers the 

 maxillae. 



Here the mentum is concave in the middle, and in the form of a 

 widened heart or of a transversal square. The anterior extremity 

 of the epistoma is neither dentate nor cornute. The thorax has the 

 form of a heart, truncated at both ends and aljrupily narrowed be- 

 hind, or that of a transverse square, rounded laterally. 



The first joint of the antennse is very large, triangular, or in the 

 form of a reversed cone. The palpi are short: the last joint of the 

 maxillaries is elongated. The outer side of the two anterior tibiae 

 presents two teeth. 



Platygema, Mac L. 



The body much flattened; thorax almost cordiform and widely 

 truncated at both ends; maAillx terminated by a pencil of hairs, the 

 internal lobe triangular and emarginate at the end; last joint of the 

 palpi ovoido-cylindrical; mentum almost square, emarginated in the 

 middle of its superior edge, and slightly on the sides; inner side of 

 the posterior tibiae densely pilose(l). In 



Cremastocheilus, Knoch, 



The thorax nearly forms a transversal square; the maxillae are 

 terminated by a strong hooked or falciform tooth, with setae or little 

 spines in lieu of an inner lobe; the last joint of the palpi is very long 

 and cylindrical; and the mentum in the form of a widened heart, or 

 of a reversed triangle, with its superior angles rounded and without 

 any sensible emargination(2). 



There, the mentum is in the form of a much widened heart, with- 

 out a discoidal cavity, and its superior margin emarginate or sinu- 



(1) Hor. Entom., I, p. 151; Trichius barhatus, Schocnherr, Synon. Insect., I, iii, 

 App. 38. 



(2^ Lat, Gener. Crust, et Insect, p. 121. M. Dupont, naturalist to the Duke 

 of Orleans, whose collection of Coleopterous Insects, next to that of Count De- 

 jean, is the most extensive in Paris, has received from Lamana — French Guiana — 

 an Insect presenting all the essential characters of a Cremastocheilus, but in which 

 the epimera or axillary pieces are more apparent when the animal is viewed from 

 above. The anterior tibiae are arcuated, and have a strong dentiform projection 

 on the inner side. All the tarsi are short, thick, cylindrical, and terminated by 

 two very long hooks. The anterior extremity of tlie epistoma is turned up in the 

 manner of an almost sqviare blade. The posterior extremity of the head presents 

 an elevation divided into two teeth or tubercles. This Insect is about an inch 

 long, black, with a red spot on each elytron. 



The Cetonia dongata, of Olivier, appears to be a Cremastocheilus. 



