368 Mr. G. C. Champion on the 
on their lower edge; median lobe * drawn out into a short, 
feebly curved point at apex. 
Length (excl. head) 64, breadth 1? mm. 
flab. Mauacca, Penang (H. N. Ridley). 
One male, received at the Museum in 1874. This insect 
has the general facies of I, pallidicolor, g , as here identified, 
differing from it in the distinctly longer, stouter, curved 
apical joint of the antennz, the darker limbs, the simply 
emarginate sixth ventral segment, and different armature. 
1. atriceps, from Burma, has a more elongate apical joint 
to the antennz, the head more produced anteriorly, the 
femora testaceous, and a dissimilar ¢-armature. 
57. Idgia decolor, sp. n. 
Elongate, narrow, shining, finely pubescent, and sparsely 
fusco-setose; testaceous, the elytra paler and somewhat 
transparent, the tips of the latter and the head black, the 
antennee and legs (the bases of the femora excepted) infuscate. 
Head elongated anteriorly, the labrum about as long as 
broad ; eyes very large, contiguous in ¢, narrowly separated 
in 9; antenne long, slender, jomt 11 sinuate, concave 
within, about one-half longer than 10. Prothorax longer 
than broad, slightly wider than the head, sinuate at the sides 
posteriorly. Elytra long, densely, finely punctate. 
¢. Anterior tarsal joints 1-3 with a comb along their 
inner edge; sixth ventral segment triangularly emarginate. 
Genital armature (Pl. XII. fig. 47): lateral lobes long, rather 
narrow, feebly curved, blunt at the tip; median lobe very 
long, slightly sinuate, drawn out into a short,-curved point 
at apex. 
Length (excl. head) 8-10, breadth 2}-3 mm. (¢ 9.) 
Hab. Burma, Karen Mts. (Voherty, type: ¢ 3); Tunas- 
sERIM, Tlavoy (Doherty: @ ). 
One male and six females. Separable from its allies by 
the pallid, somewhat transparent elytra, with small apical ° 
spot, the elongate black head, the infuscate antenne and 
legs (the bases of the femora excepted), and the ¢ -armature, 
which is very different from that of the allied Burmese 
I. atriceps, the latter also having a relatively longer apical 
joint to the antennee. One of the females from Tavoy with 
wholly pale head (eyes excepted), and another (immature) 
with the legs and antenuz also testaceous, doubtless belong 
to the same species. 
* In the fioure it is removed from its proper position and shown from 
the ventral aspect. 
