452 Mr. C. J. Gahan on 



c? . Abdomine longitudinaliter paullo concavo, clavis antennarum 

 elongatis, unguiculis tarsorum omnium simplicibus. 



2 . Alidomine convexo, clavis antennarum minus elongatis, un- 

 guiculo antico tarsorum anteriorum mediorumque bifido. 



Long. 15-18, lat. ad hum. 7-9 mm. 



Hah. Somaliland {Lort Phillips) and Aden (Yerburi/). 



Head closely punctured, with the clypeus of a reddish- 

 brown colour and its raised anterior margin blackish. Pro- 

 tliorax subnitid, very minutely and rather sparsely punctured, 

 with the anterior margin in the middle and a small spot on 

 each side of the disk of a reddish -brown colour ; lateral 

 margins nearly parallel from the base to the middle, and 

 thence converging up to the anterior angles, which are slightly 

 produced. Elytra each with four impunctate, narrow, sub- 

 costate intervals, the rest of the surface rather closely punc- 

 tured. Posterior tibiee and all the tarsi of a reddish-brown 

 colour. 



Though this species differs little in colour and general 

 appearance from many previously described, it offers a special 

 point of interest in the fact that the claws of the tarsi exhibit 

 a difference of structure according to the sex, the large ante- 

 rior claw of all the tarsi in the male being simple, while the 

 anterior claw of the anterior and middle tarsi of the female is 

 slit at the apex. A difference in the structure of the claws 

 has hitherto been regarded as a basis for arranging the species 

 of this large genus in groups or subgenera — so that^ with a 

 view to finding out whether the difference might not in other 

 cases also prove to be sexual, I have examined a number of 

 different species, but with the result, so far, that I have 

 failed to discover a second example. 



Trichodes Mm-tini^ Fairm. 

 Trichodes Martini, Fairm. Bull. Soc. Ent. France, 1896, p. 223. 



Cyaneus, supra crebre fortiterque punctatus ; elyfcris rufis, fasciis 

 duabus transversis — una ante, altera pone medium — et apice 

 extrema cyaueis ornatis ; antennis, palpis et tarsis anticis fulvo- 

 testaceis. 



Long. 9-17, lat. 2|-5| mm. 



Hah. Lahej and Aden {Yerhury). 



Dark blue in colour, with the exception of the elytra, 

 antenna3, palpi, and anterior tarsi. The elytra are reddish, 

 with the extreme apex and two nearly straight transverse 

 bands — one just in front of the middle, the other, broader, 

 lying a little way behind the middle — dark blue. Upperside 



