Malacoderm Genera Prionocerus and Idgia. 349 
head, sinuate at the sides posteriorly. Elytra long, densely, 
finely, rugulosely punctate with rows of conspicuous raised 
granules on the disc, the apices rounded. Legs slender in 
both sexes. ‘Terminal ventral segment conical. 
g. Anterior tarsal joints 1-3 with a narrow comb along 
their inner edge. Genital armature (Pl. XI. fig. 24.) : lateral 
lobes abruptly narrowed and curved downward towards the 
apex, the slender apical portion hooked at the tip above ; 
median lobe stout, sinuate distally, simply acuminate at apex. 
Length (excl. head) 6-8, breadth 2-2} mm. (¢ ?.) 
Hab, Mauacca, Penang (Mus. Brit., H. N. Ridley), Perak 
(Doherty). 
Thirteen specimens, including males from each locality, 
the two from Penang [types] dissected exhibiting peculiarly 
modified lateral lobes in ¢. This is one of four extremely 
closely allied small Malayan or Indian forms, with a testa- 
ceous prothorax and the rest of the body and legs infuscate, 
28. Idgia cavilabris, sp. n. 
3. Extremely like J. ceruleiventris and similarly coloured 
above, but differing as follows : the head broader, the labrum 
concave, the eyes somewhat distant (as in ¢ ceruleiventris), 
large, and convex ; the prothorax longer and narrower, not 
so wide as the head ; the elytra with the seriately arranged 
granules inconspicuous ; the ventral segments not metallic. 
Genital armature (Pl. XII. fig. 25): lateral lobes elongate, 
stout; median lobe drawn out into a very long slender 
point, which is sharply sagittate at tip. 
Length (excl. head) 7, breadth 2 mm. 
Hab. 8. Invi, Nilgiri Hiils, alt. 3000 ft. (77. L. Andrewes), 
Kanara (7. R. D. Bell). 
Two males—one with the scutellum testaceous, from the 
Nilgiri Hills, taken as the type, the other (injured by 
pinning) dissected and exhibiting a very peculiarly formed 
median lobe. 
29. Idgia uncigera, sp. n. 
Extremely like J. ceruleiventris, but differing as follows: 
black or pitchy black (the under surface included), the 
antenne (except several of the intermediate joints in 9), 
palpi, and prothorax testaceous ; the eyes larger, subcon- 
tiguous in g ; the antenuz considerably widened from 
joint 6 onward in ¢, shorter and more slender in ?; the 
