Descriptions of two new Coleopterous Insects. 225 
XLV. Descriptions of two new Coleopterous Insects, from 
the Collection of Sir Patrick Walker. By G. li. Water- 
house, Esq., Curator to the Museum of the Zoological 
Society. 
[Read 7th August, 1837.] 
The two insects I am about to describe, having been placed in my 
hands for that purpose by Sir Patrick Walker, belong to the sec- 
tion Longicornes. The first I shall notice is evidently closely 
allied to the genus Dorysthenes, founded by Mr. Vigors, in the 
Zoological Journal,* upon the Prionus-f rostratus of Fabricius, but 
may at once be distinguished by the absence of the large spine on 
the prosternum, which constitutes so remarkable a character in that 
genus, and by the prothorax being produced at the sides, and 
forming, on either side, three large spines. These distinctions 
induce me to describe it under a new sectional name ; it agrees 
however in so many respects with Dorysthenes , that I can but re- 
gard it as constituting a subdivision of that genus. 
Family PRIONIDiE. 
Genus Dorysthenes. 
Sub-genus Baladeva. J 
Antennce 1 2-articulatae ; articulo primo elongato, subcylindrico, ad 
apicem crassiore, secundo brevi, subconico ; tertio primo lon- 
giore compressiusculo ; cseteris gradatim decrescentibus, pe- 
nultimo et quatuor prioribus ad apicem cyathiformibus et in 
processus duos compressos productis, quarto et quinto in 
processum unicum interne productis, secundo, tertio et quarto 
subtus spinis frequentibus minutis obsitis. 
Mandibulce elongatae, subgraciles et parum incurvatse, dentibus 
internis nullis, at denticulo externo ad mediam partem ar- 
matae. 
* Vol. ii. p.514. PI. XIX. fig. 4. 
t [It seems probable that Dorysthenes of Vigors, Dissosternns of Hope, and a 
new genus lately published by Guerin, together with Baladeva of Waterhouse, 
form a peculiar family in the PrionidtE. — F. W. H. To these must also be added 
Cyrtognathus paradoxus, Falderm, and Prionus lndicus, Hope’s Col. of Nepaul. — 
J. O. W.] 
t The name of Hercules in India. It is suggested by the great size and strength 
of the insect, combined with its habitat. 
[Obs. — Mr. Hope suggests that the name should be Baladevus, to agree with 
Prionus ; but Baladeva must be masculine, and therefore the character niger must 
also be masculine.] 
