JAN.— MAR. 1857.] Dcscnpfions of new Ceylon Cokoptcra. 175 
I have taken this species not unfrequently at night on my table 
but have never found it anywhere else as yet. It is not very re- 
markable, for which reason I have mentioned the parts of the 
mouth in the description, these being moreover not very constant 
in this genus. Tlie insect is of the usual oval, Harpaliis-ioxm, of a 
dark metallic green on the back and more or less yellowish or light 
brown below, the color of the back changing occasionally to a 
brownish green. 
15. Oodes piceus. N. ^ ' 
O. ovatus, subconvexus^ piceus, tarsis, palpis antennarumque 
articulis 3 primis castaneis, palpis apice flavis. Long. corp. 4 lin. 
Caput parvum, inter antennas linea latitudinali abbreviata 
impressum. Labrum integrum, punctis 3 impressum, puncto 
intermedio bi-lateralibus uni^setigeribus. Mandibulse validag pro- 
minentes. Palpi art. ultimo elongato-ovato, apice leviter truncato. 
Menti dens apice truncatus leviterque sinuatus. Antennae art. 
3^ quarto aequali nisi paulo breviore. Thorax amplus basi elytris ap- 
plicatus, apicem versus angustatus, angulis posterioribus subdepressis 
translucentibus, ante scutellum leviter sinuosus, ante sinum obso- 
lete latitudinaliter impressus. Elytra striata, cum thorace angus- 
tissime marginata Pedes validse, ant. tibiis apice intus uni — ,in- 
termed, et post, bi-calcaratis. 
Specimen singulum f. in ripis lacus Colombensis sub vegetab. 
putrescent, legi. 
As already one species with a bifid mentum tooth (0. piilclm-) has 
been received in this genus I have waived the hesitation I should 
otherwise have felt to refer to it the present one, the tooth of which 
is of a similar description. I have not seen the 0, ptilchei', but as 
it is said to be an inhabitant of this part of the world it may pos- 
sibly be identical with my species. If not, they might, as the g. 
is otherwise pretty constant in its characteristics, be separated un- 
der a new name as types peculiar to India. Besides the abnormal 
mentum tooth the insect has not much to distinguish it from others 
of the genus. The labrum is, however, peculiar being entire, or 
even very slightly produced in the middle, with the angles rounded 
off, it is impressed near the anterior margin, with three deep punc- 
