genera and new species of Halticide. 151 
narrowly fulvous, this colour being gradually shaded into the black 
of the elytra; under side and legs fulvous. 
Hab. Upper Amazons; my collection. 
Lactica rotundicollis, n. sp. 
Pale testaceous; the thorax with evenly rounded sides, im- 
punctate, the basal sulcus narrowly impressed; elytra very finely 
and closely punctured. Length, 3 lines. 
Head impunetate, the frontal tubercles small but distinct ; 
antennz extending to one-third the length of the elytra, flavous, 
the third joint slightly longer than the fourth; thorax more than 
twice as broad as long, the sides evenly rounded, as well as the 
anterior angles, rather broadly margined, the base with a trans- 
verse impressed narrow groove and a similar perpendicular im- 
pression, impunctate; elytra rather parallel, finely and closely 
punctured ; under side and legs pale flavous. 
Hab. Gaboon. 
Much smaller than ZL. gabonensis, Jac.; the thorax 
with rounded sides, of even width, and without distinct 
anterior angles; the basal sulcus in the shape of thin, 
impressed lines, but the enclosed space not depressed. A 
single specimen is contained in my collection. 
Acrocrypta assamensis, 0. sp. 
Fulvous, with the basal joints of the antenne and the legs black; 
the head and thorax very finely punctured; elytra strongly and 
closely punctate. Length, 2} lines, 
Of broadly ovate and convex shape. The head very finely punc- 
tured between the eyes, the frontal elevations flat; palpi strongly 
incrassate ; antenne black, the basal two joints obscure fulvous 
below, the following five joints black, gradually dilated (the rest 
wanting); thorax more than twice as broad as long, widened at the 
middle, the posterior margin sinuate towards each side, the median 
lobe roundly produced, the anterior margin straight, the anterior 
angles obliquely thickened, the surface very minutely punctured 
throughout; elytra convex, much more strongly but as closely 
punctured as the thorax, the interstices also here and there im- 
pressed with minute punctures; under side fulvous; legs black, 
tibie with a strong spur, the first joint of the posterior tarsi as 
long as the following three joints together; claws appendiculate ; 
anterior coxal cavities closed. 
Hab. Assam, 
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