508 CLASS VIII. 



Add genera Ceratognathus WESTW. (and MitopJiyllus PARRY), 

 Ceruchus MAC L., (Lucan. tenebro'ides FABK., species of Platycerus 

 LATE.) 



B. Ligula horny. Antennce pubescent, arcuate. Thorax quadrate, sepa- 

 rated by stricture from abdomen. Scutellum in the peduncle of abdomen, 

 beyond the base of elytra. 



Passalus FABR. (species of Lucanus L.). Labrum transverse, 

 emarginate, ciliated. Mandibles broad, armed with thick teeth. 

 Maxillae horny, slender, with external lacinia incurved, acuminate, 

 internal shorter, bidentate. Body depressed, mostly oblong. Feet 

 short. 



P. ESCHSCHOLTZ Diss. de Coleopterorum genere Passalus, Nouv. Mem. de 

 la Soc. imp. de Moscou, I. pp. 13 23, Ann. des Sc. not. xxu. pp. 332 

 336; PERCHERON Monographic des Passales, Paris, 1835, 8vo. av. 7 pi. 

 and his supplements to this in GUERIN Magasin de Zool. 1841 and 1842. 



Sp. Passalus inlerruptus FABR., Lucanus interruptus L., VOET Coleopt. 

 i. Tab. 29, fig. i, S. America; Pass, pentaphyllus GUERIN Iconogr., Ins. 

 PL 27, fig. 7, &c. To this genus belong very many species, nearly all 

 agreeing in form, and coloured brown or black; they are in great part 

 found in S. America and the islands of the Indian Archipelago and South 

 Sea ; in JBurope and North Africa none of them are found. The larva has 

 much resemblance to that of Lucanus, but the last pair of feet is replaced 

 by two small conical tubercles, as was first remarked by PEECHERON. 

 BUEMEISTER gave a more complete description of the larva and the pupa in 

 his excellent Handbuch d. Entomol. v. s. 454, 459. 



Note. To this family of insects genus Trictenotoma GRAY was 

 formerly referred by English authors. Now, however, it is more 

 correctly referred to the Longicornia by DUPONT and also by WEST- 

 WOOD, where it is to be placed after genus Prionus (above, p. 480) 

 as an anomalous genus. By the number of joints of the tarsi it 

 belongs to the Heteromera. Antennae longer than head and thorax, 

 eleven-jointed, with first joint elongate, three last incrassate, forming 

 internally a sub-serrate club. 



Sp. Trictenotoma Childreni GRAY, DUPONT, GUERIN Magas. de Zool. 1832, 

 Ins. PI. 32, from Java. WESTWOOD has lately added two other species 

 from the East Indies, Cabinet of oriental Entomol. 1848, PI. 23. 



Phalanx II. Scarabceidea or Petalocera. Club of antennae 

 lamellate or tunicate. 



These insects form with LINK<EUS the genus Scarabceus. They 

 compose one of the most numerous divisions of the Coleoptera, 



