356 Mr. G. C. Clianipion on the 



labrum transverse, flattened ; eyes very large, narrowly 

 separated ; antennae unusually elongate, slender, widening 

 outwards, joint 11 nearly twice as long as 10, concave. 

 Prothorax slightly wider than the head, longer than broad, 

 sinuate at the sides posteriorly, rugulosely punctate. Elytra 

 very long, a little widened posteriorly ; densely, rugulosely 

 punctate, with an indication of raised lines on the disc. 

 Anterior tarsal joints 1-3 with a black comb along their 

 inner edge. Terminal dorsal segment broadly subtruncate 

 at tip. Genital armature (PI. XII. fig. 32) : lateral lobes 

 moderately long ; median lobe sinuate, drawn out into a 

 downwardly-curved point at the tip. 



Length (excl. head) 8, breadth 2^ mm. 



Hab. Ceylon (Mus. Brit.). 



One male, received at the Museum in 1875. A very 

 narrow, elongate insect, with the antennae unusually 

 lengthened and infuscate from near the base to the tip, the 

 black apical patch on the elytra occupying nearly the apical 

 half. A somewhat similar form was found by Wallace at 

 Sarawak. /. semitecta might easily be mistaken for a Tele- 

 phorid of the genus Rhagonycha. It is allied to /. dimelana 

 and other somewhat similarly coloured species with simple 

 posterior femora in J . Prionocerus {Deronima) redtenhacheri^ 

 Kirsch (1875), from Malacca, which is said to have a 

 broader apical black patch than /. melanura, seems to be an 

 allied form. 



39. Idgia melanocephala. 



Canthan's melanocephala, Fabr. Sp. Ins. i. p. 260 (1781). 

 Idgia ceylonica, Pic, L'Echange, xxvi. p. 76 (1910). 



" C. testacea, capite eiytrorum apicibus tibiisque nigris. Habitat 

 in Coromandel. Mus. Dom. lianks. Magna. Caput cum an- 

 tennis atrum immaculatum. Thorax marginatus, testaceus, 

 immaculatus. Elytra laevia, testacea, apice nigra. Abdomen 

 testaceum. Pedes nigri femoribus testaceis." \_Fabricius.'] 



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

 their inner edge. Genital armature (PI. XII. fig. 33) : lateral 

 lobes moderately long, broad, feebly sinuate ; median lobe 

 with the apical portion very long, narrow, compressed, 

 abruptly curved downward at the tip, and armed with a 

 sharp tooth before the apex above. 



Hab. S. India, Coromandel {coll. Banks), Bangalore 

 {Mus. Brit.) ; Ceylon [F. B. Fletcher) , Hapulahani {Mus. 

 Brit.)., Wadduwa {Pic). 



