226 Mr. G. R. Waterhouse’s Descriptions 
Palpi maxillares compressi, 4-articulati, articulo primo brevi, se- 
cundo et quarto elongatis, et inter se fere aequalibus, tertio 
mediocri, ultimo ad apicem paulo latiore et truncato. 
Palpi labiales compressi, triarticulati, articulo primo brevi, se- 
cundo et tertio elongatis, hoc ad apicem latiore et truncato. 
Labium minutum ad apicem bifklum. 
Thorax ad latera dentibus magnis armatus. 
Pedes mediocres, femoribus tibiisque compressis ; tibiis, nec non 
femoribus subtus, spinis minutis confertis armatis. 
Corpus subelongatum. Collum productum. 
Baladeva Walkeri. (Plate XXI. Fig. 1.) 
B. niger ; pedibus antennisque ad apicem piceis ; capite brevi ; 
thorace glabro, dentibus duobus magnis ad latera, nec non 
angulis posticis acute productis ; elytris irregulariter et cre- 
bre rugosis, lateribus laevioribus lineisque duabus elevatis 
longitudinaliter excurrentibus. 
Long. corp. 2' 10". ; lat. 1' 0|". 
Habitat in India Orientali. 
I have named this magnificent insect after the most amiable and 
zealous Entomologist to whom it belongs. In size it greatly ex- 
ceeds the Prionus rostratus of Fabricius, and is proportionately 
broader, but agrees with that species in the structure of the an- 
tennae, palpi, and legs ; the tarsi however are broader ; it more- 
over has the hinder portion of the head greatly elongated, the 
large transverse eyes separated above by a narrow space, and the 
large mandibles which we observe in the insect just mentioned. 
The mandibles, which measure eleven lines in length, are rather 
slender, slightly curved inwards, and pointed; they present a to- 
lerably sharp inner edge, and on the outer side is a small tooth 
situated about halfway between the base and apex of the man- 
dible ; again, between this tooth and the base, numerous very minute 
denticulations are observable. The length of the head (measuring 
from the labrum to the thorax) is 9 lines, and its greatest width, 
which is towards the base, is 6f lines ; between the eyes is a cen- 
tral longitudinal groove, and a longitudinal ridge on either side 
forms the inner margin of the eye; the eyes are large, transverse, 
and slightly ernarginated in front : behind the eyes, the upper sur- 
face of the head is smooth, or very nearly so ; on the under surface 
are numerous small, irregular transverse rugae, the fore part is 
dilated, and produced on either side into an angle. The pro- 
thorax is broader than long, its length being 5-| lines, and width 
