354 Mr. G. C. Champion on the 
35. Idgia flavilabris, sp. n. 
Elongate, narrow, slightly widened posteriorly in ?, 
shining, finely pubescent, and sparsely setose; luteous, the 
head (the labrum excepted) and a rather small apical spot 
on the elytra black. Head small, the labrum transverse, 
flattened ; eyes extremely large, contiguous in @, very 
narrowly separated in ?; antennz long, slender, filiform, 
joint 11 concave within, twice as long as 10. Prothorax 
longer than broad, about as wide as the head, sinuate at the 
sides posteriorly. Elytra elongate, at the middle twice as 
wide as the prothorax ; densely, finely punctate, the sete on 
the disc and margins long and conspicuous. 
g. Sixth ventral segment triangularly emarginate; pos- 
terior femora moderately incrassate ; posterior tibize hollowed 
at the apex within, the spurs short ; anterior tarsal joints 1-3 
with a black comb along their inner edge; terminal dorsal 
segment rounded at tip. Genital armature (Pl. XII. fig. 30;: 
lateral lobes narrow, curved downward and more slender 
at the apex; median lobe drawn out into a blunt curved 
point at the tip. 
Length (excl. head) 84-9, breadth 23-3 mm. (¢ ?.) 
Hab. Mauacca, Perak (Doherty: 3 2), Penang (G. £. 
Bryant: 80.x.1918: @). 
One male and three females. Near J. maculiventris, which 
also has the posterior femora incrassate in ¢; but smaller, 
narrower, and more shining, the apical spot on the elytra 
not so large, the ventral segments wholly luteous, the ¢ 
with peculiarly formed posterior tibiz and dissimilar genital 
armature. J. bourgeois, Pic (1906), from Java, length 12- 
13 mm., is probably another allied form ; it is described as 
having slightly dilated posterior femora in @, the elytra 
narrow and very elongate, the posterior part only of the 
head black, &c. 
36. Idgia geniculata, sp. n. 
¢. Elongate, narrow, subparallel, shining, finely pubescent, 
and sparsely setose; testaceous, the head (the epistoma aud 
labrum excepted), a streak at the apices of the femora, and 
a rounded spot at the apex of the elytra, black. Head rather 
small, the labrum transverse, flattened ; eyes large, somewhat 
narrowly separated ; antennz long, slender, filiform, joint 11 
concave and longer than 10. Prothorax longer than broad, 
very little wider than the head, sinuate at the sides posteriorly. 
Elytra long, at the middle nearly twice as wide as the head ; 
