Malacoderm (ienera Prionocems and Mj^ia. 3GD 



58. Idyia anyustata, sp. ii. 



cJ . Eloiifjatr, vt-ry narrow, «hiiiiii;;, finely pubescent, and 

 very sparsely ni^ro-setose ; pale testaceous, the head (the 

 hihnmi and anterior niarfrin of cpistonia excepteil ), and a 

 small, rounded, sharply defined spot at the tip of the elytra, 

 hlaek, the antennae (except at the base and apex) slij^litly 

 infnscate. Head soniewliat produced anteriorly, the labrum 

 transverse, trapezoidal ; eyes very larpe, siibcontijiuous ; 

 antcnnie Ion;,', filiform, joint 11 sinuate, twice as long as 10. 

 Trothorax lon|;er than broad, about as wide as the head, 

 sinuate at the sides posteriorly. Elytra very Jong, narrow, 

 parallel, densely, finely punctate. Sixth ventral segment 

 triangtilarly emarginate. Anterior tarsal joints 1-3 with 

 a black comb along their inner edge, (ienital armature 

 (PI. XII. fig. 4H) : lateral lobes moderately long, sinuattly 

 curved as seen from above, deeply emarginate on the lower 

 edge before the tip, the latter obtuse ; m«.'diau lobe curved, 

 drawn out into a short arcuate point at the apex. 



Length (excl. head) 7i, breadth 2 mm. 



Hub. N. Borneo, Labuan [Mus. Brit.). 



One male. Very like /, pallidicolor, Pic, but with a long, 

 sinuate, apical joint to the antennic and a simply emarginate 

 sixth ventral segment. From the same sex of /. diheriyi^ 

 from Perak, the relatively narrower elytra and diticrent 

 (^-armature will serve to distingjiish tlje present insect. 

 A female from Sarawak {Wallace, in Mus. Uxon.), with 

 larger apical patch, may belong here ? 



59. Idyia dubia. 



Canthiiris dubia, Oyll. in Schiiiih. Syn. lus. i. 2, p. 73, nota (1808). 

 Idgia dubia, Gemm. and Harold, Cat. Coleopt. vii. p. 1721 (186i)). 



" Elonpata, pallide tcstacea, antennis, oculis, elytrorum apice pedi- 

 busque nigria. — Ind. or." [Oi/lUnhal.'] 



Hab. I.NDiA (Mus. Brit.), Patkai Mts., Assam [Doherty). 



Two females in the Museum collection, with the head 

 wholly testaceous (the eyes excejited), may belong to this 

 species, but the dark mark on the vertex mentioned by 

 Gyllenhal is wanting. 'Jhey have the antennse, knees, tibiie, 

 and a small spot at the tips of the elytra infuscate or bluck, 

 the antenna- a little shorter than in most of the allied forms, 

 with the terminal joint excavate and about twice as long as 

 the tenth. /. dubia. treated by Pic as a ** species inccrta,'* 

 is couj pared by him with his J . pallidicolor fro:u Java. 



