177 
Six New East Indian Coleoptera. 
triangular, of the same deep shining green as the thorax, with two 
large oval discoidal spots near the apex of the scutellum, and two 
broad fasciae near the apex, extending from the margin nearly to 
the suture, rounded internally, and the posterior margin waved. 
Wings black. 
Abdomen projecting beyond the elytra, brassy green, partly 
covered underneath with reddish brown hairs. 
Legs long, especially the first pair, green with shades of purple, 
the tarsi steel blue. Tibice of the first pair slightly curved, with 
a large tooth towards the apex externally, expanded at the apex 
into a tooth on either side, and all the under part covered in a 
remarkable manner with irregular and elevated tubercles ; of the 
middle and last pairs, straight, ciliated internally with long reddish 
brown hairs, and supplied each with a pair of spurs. Tarsi, with 
the joints tubercled underneath, especially in the first pair, and the 
last joint with a bundle of hair underneath, near the claws, in the 
two first pairs. 
Claws very long and curved. 
Length, 1^ inches. 
From the East Indies, in the collection of S. Rucker, Esq. 
This splendid insect, nearly allied to Celonia, I have ventured 
to propose as a new genus, but others more conversant with 
the group to which it belongs must determine whether 1 have 
acted rightly. The very remarkable fore legs, projecting tuber- 
cled head, protuberant thorax, and ciliated posterior tibiae, are the 
external characters which have led me to this. The parts of the 
mouth I have not ventured to dissect and examine, the specimen 
being unique. 
The specific name is after my friend Sigismund Rucker, Esq. 
a great friend of Entomology, and who kindly lent me the insects 
described in this paper, from a collection he has lately procured 
from the East Indies. 
PI. XVI. Fig. 1 a, head and thorax seen sideways; 1 b, sternum ; 1 c, fore leg. 
Lucanus Bicolor. Fab. var. (PI. XVI. Fig. 3.) 
Dark shining brown, almost black. 
Head broad, quadrate, emarginate in front, wavy at the anterior 
angles, a sharp tooth on each side behind the eyes, two slight im- 
pressions on the front, and the part about the eyes underneath 
deeply truncate. Mandibles stout, projecting, almost as long as 
the head, dentate externally, with five or six rounded irregular 
teeth on each. 
Thorax rather broader than the head, transverse, rounded on the 
