COLEOPTERA. 
*- at- 
oo 
HETEROMERA- 
By EREDERICK BATES. 
Family— TENEBRI ONIDJ2. 
Sub-Family — TENTYRIIN2E. 
Gronp— GNATH OSIIDES. 
Syachis, n. g. 
Intermediate between Ascelosodis and Capnisa. At once to be separated from tbe former 
by its having the outer apical angle of the anterior tibiae not dentiform, and from the latter 
by its having the antennary orbits more convex and more rounded in front ; prothorax wider 
and more deeply cmarginate in front, the sides rounded and decidedly contracted behind ; 
elytra shining black and more or less strongly punctured, the epipleurse being sometimes 
muricately punctured ; prosternal process horizontal and pointed behind ; mesosternum decli- 
vous and concave in front. 
The lateral teeth of the submentum are long and pointed : the mentum is strongly trans- 
verse, almost flat, hexagonal, the apex triangulately notched in the middle, coarsely punctured : 
the last joint of the labial palpi is robust, more or less semi-oval (broadly truncated at the 
apex) : the outer lobe of the maxilla is furnished with a long, curved claw ; the last joint of 
the palpi is elongate-oval and broadly obliquely truncated at apex ( pioicornis ), or triangulate 
with the apex a little oblique ( himalaicus ) : the mandibles are stout, notched at apex, and 
are furnished on their upper edge, before the apex, with a stout horizontal tooth, which clasps 
the sides of the labrum, and is sub-acute ( himalaicus ), or obtuse {pioicornis), and is always, 
more strongly developed on the right mandible than the left : the head is short, robust, more 
or less wrinkled above the eyes, almost obsoletely so in pioicornis ; throat transversely im- 
pressed : epistoma more or less prominent, more or less distinct from the antennary orbits, 
rounded or truncated in front, and is, in himalaicus, hollowed out at the sides, leaving the 
mandibles almost completely exposed : the antennae are short, slender, a little thickened apically 
joint 3 much longer than 2 or 4 : the prothorax is strongly transverse, convex, decidedly wider 
in front than the head, sides more or less rounded, apex more or less deeply emarginate, base 
more or less feebly sinuately rounded : elytra convex, more or less abruptly declivous behind, 
wider at base than base of prothorax : epipleurae moderately broad, the fold expanding at the 
base and reaching the humeral angle, narrowly, but very distinctly, attaining the apex : tibiae 
hispid, or spinulose, elongate-triangulate, the anterior most strongly so and finely denticulate 
on the outer edge, the apex simple ; tarsi sparsely ciliate, with short spiniform hairs, the first 
joint of the posterior as long as the last : intercoxal process moderate, a little contracted 
anteriorly and broadly rounded at apex : prosternal process horizontal, a little produced and 
pointed behind : mesosternum declivous and a little concave in front : episterna of metathorax 
slightly curvedly contracted posteriorly. 
I have failed to discover any really distinctive sexual characters in this and cognate 
genera of the old world ; there are differences of degree in the punctuation, &c., of the abdomen, 
h 2 
