genera and new species of Halticide. 157 
Xenidea Balyi, n. sp. 
Subquadrate-ovate, piceous; the antenne (the 7th, 8th, and 9th 
joints excepted), and the four anterior legs, fulvous; thorax dark 
bluish, remotely punctured; elytra metallic purplish, strongly 
punctate-striate, the interstices rather convex. Length, 14 line. 
Head obscure purplish, impunctate, the frontal tubercles in the 
form of narrow oblique ridges, the carina acutely raised ; labrum 
and palpi fulvous; antenne filiform, extending to the middle of 
the elytra, fulvous, the 7th, 8th, and 9th joints black, 2nd joint 
thickened, half the length of the 3rd; thorax nearly twice as broad 
as long, the sides straight, the anterior angles oblique, the posterior 
margin broadly produced at the middle, the base with an obsolete 
depression at each side, the rest of the surface remotely and rather 
strongly punctured; elytra with an obsolete depression below the 
base, very strongly punctate-striate, the interstices (especially near 
the sides) rather costate; posterior femora with a purplish gloss, 
posterior tibie strongly widened towards the apex, sulcate and 
armed with a spur. 
Hab. New Guinea. 
Distinct from any of the species described by Baly, by 
the colour of the antenne, and the strongly punctured 
thorax. 
CHALHNOSOMA, N. gen. 
Body oblong-ovate, metallic ; antenne filiform, the second and 
third joints short, equal, the fourth longer than the following 
joints; thorax strongly transverse, rather convex, the posterior 
margin rounded, the surface without depressions; elytra with a 
strong basal depression, irregularly punctured, their epipleure 
broad, extending to the apex; legs long and slender, the posterior 
femora but moderately thickened, all the tibie unarmed, the first 
joint of the posterior tarsi as long as the following three joints 
together, claws appendiculate, prosternum very narrow, the anterior 
coxal cavities closed. 
On account of the unarmed tibie, a rare character 
amongst the numerous genera of Halticide, the closed 
coxal cavities and transverse thorax, Chalenosoma will 
find its place near Chalenus, from which the different 
structure of the antenne and the much longer posterior 
first tarsal joint separates it. 
Chalenosoma metallicum, n. sp. 
Metallic green, with the antenne, the tibiw, and the tarsi more 
or less black; thorax extremely minutely punctured; elytra strongly 
