526 Transactions South African Philosophical Society, [vol. xiii. 



Gen. LISSOGENIUS, Schaum., 

 Ann. Soc. Ent. Fr., 1844, p. 420. 



Chtonobius, Burm., Handb. d. EntomoL, v., 1847, p. 567. 



Mentum not obturating completely the buccal aperture, incised 

 laterally at the base and with the inner face projecting strongly at 

 the insertion of the palps which is very low, ampliate thence, but 

 with the palps cavity very long, slightly arcuate and not emarginate 

 in front, impressed longitudinally on the outer face ; maxillae robust, 

 upper lobe armed with a long and robust, strongly falcate tooth 

 densely villose outwardly, inner lobe with a strong tooth nearly 

 bent at right angles, and also villose outwardly ; last joint of labial 

 palpi very long, slightly curved outwardly, straight inwardly, pro- 

 jecting w T ell beyond the mentum and slightly longer and stouter than 

 the maxillary one ; head with a sharp, transverse keel broadly inter- 

 rupted in the centre between the eyes ; clypeus deflexed, parallel for 

 half the length, strongly angular there, triangularly narrowed thence 

 to the anterior part which is strongly incised and transversely 

 carinate on each side on the upper part at a short distance from the 

 apex; eyes narrow on the upper side, large underneath ; prothorax 

 one-third broader than long, broadly ampliate in the median part 

 which is very obtusely angular, and much narrowed in the posterior 

 part the basal angles of which are very sharp ; scutellum long, 

 sharp ; elytra hardly broader at the base than the prothorax at its 

 widest part, well sinuated laterally, parallel thence to the apex, 

 bi-costate on each side ; propj'gidium with the last spiracle sharp ; 

 pygidium sub-vertical, simple; mesosternum, simple; presternum 

 with a long, vertical process ; joints of anterior tarsi very short and 

 strongly nodose, the apical one strongly constricted at half length, 

 the two basal ones acuminate underneath, those of the posterior 

 ones not longer, also thick, but not nodose ; claws very small and 

 weak ; anterior tibia) with the apex moderately sharp and having 

 two blunt teeth outwardly set close to each other, and a smaller one 

 above these. 



This genus includes two species, one of which is recorded from 

 Guinea. 



Lissogenius conspersus, Burm., 

 Handb. d. EntomoL, v., p. 567. 



liiteorarius, Bohem., Ins. Caffr., ii., p. 55. 



Black, sub-opaque with the upper side, especially the elytra, 

 maculated with small terrenous patches ; head and clypeus roughly 

 foveolate, prothorax with abroad but somewhat indistinct impression 



