530 Mr. G. J. Arrow on 



and the West African 'rrirhiiia podicalis and tristicuhis of 

 Kraatz, the only members of the ^eiuis hitlierto known from 

 Africa. It is hirj^er than those species, tlie cohjnr of the 

 upper surface is not hhick, but a greenish-brown, and the 

 pattern is different. The |)ronotum has no median strii)e, 

 the pale lateral border has a dark spot in the centre, and the 

 elytra, instead of six scattered jjale spots, as in T. podicalis, 

 have only the humeral marj^in and (in the female) a small 

 transverse median spot p;de. The propy<^idium is i)ale and 

 the pyj^idium is of the dark colour of the elytra, with the 

 apex pale, the pale area ending above in three narrow 

 finger-like rays. 



The male is rather smaller, shorter, and more compact 

 than the female, the thoracic border is more sharply defined, 

 and the elytra are without the median spot. The latter 

 dilTerencc is probably a constant one, five female specimens 

 showing the pale mark, while two females are without it, 

 and Mr. F. R. Mason informs me that this is so with another 

 male in his collection. The three teeth of the front tibia are 

 sharp in the male, the hind tarsi are slightly longer than 

 those of the female, and the abdomen is a little less exposed 

 beyond the elytra. The club of the antenna scarcely differs 

 in length in the two sexes. 



This insect (and probably also the allied species, 

 T. podicalis and tristiculus, which are unknown to me) 

 differs considerably from the other members of the genus in 

 general appearance. It is more solidly built, the legs are 

 shorter, the front tibi;e being very short and broad, with a 

 strong third tooth placed at the middle of the outer edge or 

 a little behind it. The hair of other Trichii is rei)laced by 

 very short stiff setie, which become broad scales upon the 

 lower surface. 



Calometopus transparens, sp. n. (PI. VIII. fig. 5.) 



Niger, elytris translucentibus, flavescenti-hyalinis, iii<>;ro-niargiiia- 

 tis, corpora setis et ^(luamis albidis supra et subtus ornafo, 

 pronoto utrinque raaculis tribus discoidalibus duabusque mar- 

 ginalibus, abdominis dorso transverse fasciato, py.^idiocjue vitta 

 alba mediaiia, medio anjjiiste bisecta; angustus, pcdibus graciH- 

 l)Us, capite magno, clypco subqiiadrato, antice valde bilobato, 

 l)ronoto quam loiigitudinem ])aulo latiori, angulis obtusis ; 

 sciitello longo, aciito ; elytris dejdanatis, setis jongitudinaliter 

 ordiriatis instructis costaquo humerali valida integra, posticc 

 attenuatis, apice rotundatis; pygidio ruguloso ; pedibus graci- 

 lilnis: 



