Malacoderm Genera Prionocerus and Ideia, 369 
58. Idgia angustata, sp. n. 
3g. Elongate, very narrow, shining, finely pubescent, and 
very sparsely nigro-setose ; pale testaceous, the head (the 
labrum and anterior margin of epistoma excepted), and a 
small, rounded, sharply defined spot at the tip of the elytra, 
black, the antennz (except at the base and apex) slightly 
infuscate. Head somewhat produced anteriorly, the labrum 
transverse, trapezoidal ; eyes very large, subcontiguous ; 
antenne long, filiform, joint 11 sinuate, twice as long as 10. 
Prothorax longer than broad, about as wide as the head, 
sinuate at the sides posteriorly. Hlytra very long, narrow, 
parallel, densely, finely punctate. Sixth ventral segment 
triangularly emarginate. Anterior tarsal joints 1-3 with 
a black comb along their inner edge. Genital armature 
(Pl. XII. fig. 48): lateral lobes moderately long, sinuately 
curved as seen from above, deeply emarginate on the lower 
edge before the tip, the latter obtuse ; median lobe curved, 
drawn out into a short arcuate point at the apex. 
Length (excel. head) 74, breadth 2 mm. 
Hab. N. Borneo, Labuan (Mus. Brit.). 
One male. Very like /. paillidicolor, Pic, but with a long, 
sinuate, apical joint to the antenne and a simply emarginate 
sixth ventral segment. From the same sex of J. dohertyi, 
from Perak, the relatively narrower elytra and different 
dg -armature will serve to distinguish the present insect. 
A female from Sarawak (Wallace, in Mus. Oxon.), with 
larger apical patch, may belong here ? 
59. Idgia dubia. 
Cantharts dubia, Gyll, in Schoénh, Syn. Ins, i. 2, p. 78, nota (1808). 
Idgia dubia, Gemm, and Harold, Cat. Coleopt. vii. p. 1721 (1869). 
“ Hlongata, pallide testacea, antennis, oculis, elytrorum apice pedi- 
busque nigris.—Ind. or.” [ Gyllenhal.] 
Hab. Invia (Mus. Brit.), Patkai Mts., Assam (Doherty). 
Two females in the Museum collection, with the head 
wholly testaceous (the eyes excepted), may belong to this 
species, but the dark mark on the vertex mentioned by 
Gyllenhalis wanting. 'They have the antenne, knees, tibiz, 
and a small spot at the tips of the elytra infuscate or black, 
the antenne a little shorter than in most of the allied forms, 
with the terminal joint excavate and about twice as long as 
the tenth. J. dubia, treated by Pic as a “ species incerta,” 
is compared by him with his J. pailidicolor from Java. 
