Genera and Species of Coleoptera. 33 
Phormesa demissa. 
P. angustior, fusca; capite subreticulato; prothorace lateribus antice 
rotundatis, dein subparallelis, basi vix constricto, utrinque bicostato, 
costa interiore postice incurvata; elytris lateribus subparallelis. 
Hab. Malabar. 
Much narrower than the preceding, brown ; head rugosely punctured, 
with a few irregular and slightly elevated lines, so disposed as to form 
a kind of network; prothorax broadly margined, the disk with two 
elevated lines on each side, the interior approximating anteriorly and 
forming a short canal, strongly incurved at the base, the exterior costa 
entire; elytra rather broader posteriorly, each with five coste, the in- 
tervals broad and marked with a double row of coarse obscurely defined 
punctures ; body beneath chestnut-brown ; legs and antennze yellowish 
testaceous. Length 13 line. 
Narrower than the other species of this genus, and easily distin- 
guished from them by the form of the cost of the prothorax and the 
reticulated head. 
Inrestvs [ Colydiide }. 
Caput quadratum, ante oculos dilatatum. Oculi rotundati, prominentes. 
Antenne articulis duobus primis incrassatis, clava triarticulata. Palpi 
labiales articulo ultimo ovato, obtuso. Prothoraxr subquadratus, irre- 
gulariter sulcatus, lateribus marginatis, serrulatis. Elytra costata. 
Pedes graciles; tibiis anguste trigonatis, calcaratis ; tarsis brevibus. 
Near Lasconotus (subfamily Synchitine), a genus very briefly cha- 
racterized by Erichson. The eyes, however, are said to be entirely 
covered by the dilated borders of the head—an unusual structure in 
this family. Here they are more than usually prominent. In the 
female of the species described below, the prothorax is more decidedly 
transverse than in the male. 
Dr. Leconte, in the ‘ Journal of the Academy of Natural Sciences 
of Philadelphia,’ 1859, p. 282, has shortly described a Colydian 
which he refers to this genus; he observes that it is ‘at once re- 
cognized by its concave head and three-jointed club of the antenne,”’ 
but nothing is said in reference to the unusual position of the eyes. 
It is from Punta de los Reyos in California. 
Illestus terrenus. (Pl. III. fig. 4.) 
J. fuscus vel rufo-fuscus, opacus ; oculis nigris. 
Hab. Mexico. 
Dark brown or reddish brown, opake; head partially exserted, qua- 
drate, finely granulated; eyes round, prominent, black ; antennse with 
the basal joint thickened, partially covered at the base, the second also 
VOL. II. D 
