Malacoderm Genera Prionocerus and Idgia, 341 
Hab, W. Cutna, Chin-Fu-San (M. A. Maw). 
One specimen, in poor condition, received by the Museum 
in 1908. Near J. flavirostris, Pasc., but smaller, narrower, 
and more slender, the prothorax opaque and coloured, like 
the elytra, the seriately arranged granules on the latter 
conspicuous, 
Indian and Malayan Species*, 
a, Antennal joints [ 9] 8-10 serrate, different in shape 
from those preceding; head small; prothorax vittate ; 
elytra broad, black). cf) seen cesses sie ees deseses 
6, Antennal joints 8-10 similar in shape to those preceding. 
a, Antennal joint 4 very short, about as long as 2, the 
antenne themselves strongly serrate in d; pro- 
thorax testaceous; elytra metallic ..........06. 2 NOLL, 
b'. Antennal joint 4 nearly or quite as long as 3 or 5, 
a*, Antenne strongly serrate in ¢; body brilliantly 
IGEAMLIC.  Geyece's save © wi tis wiefalele! ove wiparwiatei dl alo ate aiele se, INO, 1S; 
6*, Antenns not strongly serrate in d, not differin 
greatly in the two sexes, 
a’, Elytra metallic; the prothorax rufescent or 
testaceous, maculate in some of the species, 
a‘. Posterior femora not thickened in g¢........ Nos. 19-21. 
b*. Posterior femora more or less thickened in g. Nos, 22-24. 
b°, Elytra infuscate or black (paler in I. gorhami, 
Pic, var.), sometimes with a metallic lustre ; 
the prothorax testaceous, maculate in J. ni- 
ETUC We swags vi fete Ora) sa rales sf 01D high’ pia] ey) x0! atoes 
ce’, Elytra infuscate, with the sutural and outer 
margins in part or entirely flavescent; the 
prothorax testaceous, maculate in I. marginata. Nos, 31, 32. 
d', Elytra viridi-vittate on disc and the prothorax 
maculate, the former dilated at base ........ No. 88. 
e?, Elytra and prothorax testaceous or luteous, the 
former black at tip. 
c*, Posterior femora thickened in G ....+++-5- Nos, 34-36, 
d‘. Posterior femora not thickened in ¢. 
a’, Apical patch on elytra extending forward 
No, 16, 
Nos. 25-30. 
to about the middle ......00.cens+eees Nos, 37, 38. 
b°. Apical patch moderately large, rarely 
reaching so far forward.......+-- see aele Nos, 39-48, 
ce. Apical patch small. 
a®, Sixth ventral segment triangularly emar- 
PURI EUUU NSM aioe oi «fehainns sisistché eas s"afike 01>" Nos. 49-59, 
b°, Sixth ventral segment trilobed in g.... No. 60. 
Species provisionally referred to Idgia (d wanting): 
small, slender, metallic, Dasytiform ..,.....+++-.- No. 61. 
16. Idgia triserrata, sp. 0. 
@. Moderately elongate, widened posteriorly, the head 
and prothorax shining, the elytra dull, finely pubescent and 
* $ fg wanting of Nos. 16, 38, 37, 48, 48, 59. 
Ann. & Mag. N. Hist. Ser. 9. Vol. ii. 23 
