Malacoderm Genera Prionoceius and Idgia. 339 



/. nitida in that respect), and the (^-armature very different 

 from tliat of /. melawira. 



The length (Cxcl. head) varies from 8^-10 mm. The 

 eleventh antcnnal joint is deeidy excavate and more than 

 twice the length of the tenth. 



12. Iihjia unguluta, sp. n. 



Elongate, narrow, shining, finely puljcsccnt, and sparsely 

 setose ; testaceous, the head (except tlie lahruui in part or 

 wholly, and sometimes a spot at the base), and a small patch 

 at the apex of the elytra, black, the antennae, tibiie, tarsi, and 

 apices of the femora more or less infuscate. Head some- 

 what produced in front, the labrum transverse, concave 

 eyes very large, almost contiguous in ^ ; antenuKJ slender, 

 distinctly widened outwards, joint 4 a little shorter than 

 3 or 5, 11 deeply excavate within, twice as long as 10. 

 Prothorax very little wider than the head, slightly longer 

 than broad, feebly sinuate at the sides posteriorly, sparsely 

 punctuate. Elytra moderately elongate, finely, somewhat 

 densely punctate. 



(^ . Anterior tarsal joints 1-3 with a comb along their 

 inner edge ; posterior tibire distinctly arcuate towards the 

 apex, the spurs strongly developed, curved, the upper one 

 longer than the other. Genital armature (PI. XI. fig. 12) : 

 lateral lobes long, broad ; median lobe sinuate, gradually 

 narrowed to the rather blunt tip. 



Length (cxcl. head) Q-7^, bi-eadth 2-2| mm. 



Hub. China {Mus. Brit.), Hong Kong {Mus. Brit., F. W. 

 Terry, J. J. Walker), Amoy (G, Lewis). 



A long series, males preponderating. Less elongate than 

 /. deusta as here identified, the head not wholly black in 

 front, the apical patch smaller; the male with differently 

 f(;rmed posterior tibite, longer asymmetric spurs (suggestive 

 of those of certain Scirtes), and dissimilar genital armature. 



13. Jdyiajfavicollis. 

 Idgia Jlavicollis, Redt. Keise der Nuvara, ii. p. Ill (1868) : Fuirra 

 Auu. Soc. Ent. Fr. (6) ix. p. 45 (1889). 



cJ . Eyes distant, as in ? ; anterior tarsal joints 1-3 with 

 a comb along their inner edge. Genital armature (PI. XL 

 fig. 13) : lateral lobes long; median lobe narrow, pointed at tip. 



Hab. China, Hong Kong. 



There is a long series of tliis species in the IMuseum, in- 

 cluding several examples captured by Commander \\'ulker 



