12 Mr. F. P. Pascoe's Descriptions of New Genera 



II. On New Genera and Species of Longicorn Coleoptera. 

 Part IV. By Francis P. Pascoe, Esq., F.L.S., &c. 



As descriptions of many of Mr. Wallace's Aru Longicorns are 

 contained in the present Part, it may be, perhaps, interesting to 

 make a few remarks on his general collection of Coleoptera from 

 that island, including the adjacent one of Key. The first glance at 

 once showed a complete dissimilarity of forms to those we are 

 accustomed to see from Australia : group after group marked its 

 Indian island character, and it was only after a close inspection 

 that here and there an Australian form might be noticed. 



Premising that I have only attempted a very slight sketch, as 

 there were too many unpublished forms to allow of going into 

 many details, I commence with the Cicindelklce. This family was 

 represented by Tricondyla, and Thcrates, no true Cicmdela being 

 present. Carabidce were few in number, and belonged chiefly to 

 Lehia and its allies. Staplnjlinidce were also few, and not re- 

 markable. 



Nothing has struck me so much in all Mr. Wallace's "island" 

 collections as the paucity of Lamcllicornes. Tiiere are generally 

 a few individuals of the cosmopolite Onihophagus and Oryctes, 

 and perhaps some eight or ten Ccton'iadce, but rarely more than 

 two or three examples of each. Anoplognathus, Phyllolocus, Di- 

 p/nicephala, Liparclrus, and other common Australian genera of this 

 order, are wholly wanting. 



Of the Malacoderms there were upwards of forty species., all 

 rather small, and none particularly striking. The Cleridce were 

 entirely represented by Stigmatntm and Oinmaditts, genera very 

 abundant in the Indian Archipelago. 



Three or four species of Chrysodema, gems even amongst the 

 Biipreslidee, Melanophila, Agrilus, Trachys, and one Milnbasis, 

 comprised the whole of the family from Aru ; not a single Casl'ia- 

 r'lna, or any of its allies, so common in the very poorest Austra- 

 lian collections. Elateridce were fairly represented, and had two 

 or three curious forms among them. 



The nimnber of Melasomes appears to be very limited in the 

 Indian islands ; the Aru collection contained two or three obscure 

 species of Opnlnim, and few of the other Heternmera were common. 

 Mordtlla, the most abundant genus, had six species ; and of 



