new genera and species of Phytophaga. 25 
elongatum, apice emarginatum. Metasternum magnum, 
tumidum. 
Type, Eutrea Bowringit. 
Eutrea and Xenaltica (described below) are the only 
two forms of Halticine known to me in which the apices 
of the hinder pair of tibize are armed with a double spine ; 
all other genera belonging to the group (Nonarthra ex- 
cepted, where the spine is obsolete, the margin of the apex 
being bordered by a row of small teeth) are furnished only 
with a single spine. 
Eutrea Bowringit. 
Elongata, convexa, picea, pube adpressa, hic illic (luce ' 
mutante) chalceo-micanti, dense vestita ; antennarum basi, 
pedibus anticis quatuor et tibiis tarsisque posticis obscure 
fulvis. 
Long. 14 lin. 
Hab.—Hongkong ; collected by Mr. Bowring. 
Body elongate, densely covered with adpressed silvery 
hairs, which, seen in certain lights, have a brassy reflec- 
tion. Head exserted far beyond the eyes, the latter large, 
coarsely granulose; labrum and clypeus rufo-piceous; ver- 
tex finely rugose. Thorax scarcely broader than long; 
sides straight and parallel, slightly sinuate behind the an- 
terior angle, very narrowly margined; upper surface sub- 
cylindrical, flattened on the disk, finely rugose, closely 
covered with decumbent silvery hairs. Elytra much 
broader than the thorax, oblong, moderately convex, 
slightly depressed below the basilar space; whole surface 
rugose, closely covered with adpressed hairs, which are 
arranged in patches with their apices directed different 
ways, so that the metallic lustre varies according to the 
position in which the insect is viewed. Body beneath less 
densely clothed with hairs than the upper surface. 
Genus XENALTICA. 
Corpus subelongatum aut oblongum, convexum. Caput 
modice exsertum; antennis 11-articulatis, filiformibus ; 
caring lineariformi; encarpis distinctis, medio contiguis. 
Thorax transversus, ante basin leviter transversim im- 
pressus, basi utrinque sulco brevi longitudinali instructo ; 
lateribus reflexo-marginatis. /lytra oblonga, modice con- 
vexa, infra basin transversim excavata, confuse punctata. 
