ORDER COLEOPTERA. 4-71 



rowed, without sinus or tooth on the outside. The body is 

 depressed, and the corslet dilated and rounded at the sides * 



Our second division includes Scarabaei, nearly related to 

 the last in some respects, but approaching also several Melo- 

 lontha, and particularly cetoniae, whose outward appearance 

 they possess, but whose buccal organization is different ; it 

 is even with these that Fabricius and Olivier have placed the 

 greater part of these insects. The body in general is shorter, 

 rounder, and smoother than that of scarabaeus, and orna- 

 mented with brilliant colours. The head and corslet are 

 identical, and without any particular eminence in either sex. 

 The front edge of the labrum is almost always uncovered or 

 apparent. The jaws are entirely scaly, as if truncated at the 

 end, with five or six strong teeth on the inner side. The 

 mentum is in proportion shorter and longer than that of simi- 

 lar coleoptera, and is less narrowed above. The mesosternum 

 is often elongated like a horn, or soft point between the second 

 tarsi and beyond. The scutellum is commonly large. The 

 hooks of the tarsi are generally unequal. With the exception 

 of a small number, these Xylophili are peculiar to the equa- 

 torial countries of the new continent. 



Here, as well as in all the preceding scarabaei, one does not 

 see between the posterior angles of the corslet, and the outside 

 of the base of the elytra, axillary pieces filling up the void 

 included between these parts.-f* 



• G. didymus, valgus, depressus, of Fab. Some inedited species of 

 Brazil and Cayenne, having some analogy with the Sinodendrons, have the 

 body thicker, and connect Phileurus with Scarabaeus, or Geotrupes of 

 Fab., a genus not yet sufficiently studied, with reference to its buccal 

 organization. 



■j- A lateral piece of the mesosternum, larger and thicker than common, 

 and whicii corresponds probably with those little round scales called 

 TeguUB by some authors, to be seen at the insertion of the upper wings 

 of Hymenoptera. See on this subject the memoir of M. Audouin on the 

 thorax of insects. 



