1H90.] COLEOPTERA FROM CENTRAL AFRICA. 491 



nis articulis S"-!'!'", tibiis et tarsis fulvis ; tuberculo inesostertii 

 valido, profiferni minore. aaito. Antenna ( d ?) corpore jid-vllo 

 longiores, rohitstcp, apice acuminatcp, artmdls arete conjunctis. 



Long. 16 millim. 



One example only. 



A closely- allied species from the Gaboon and Cameroons mimics 

 Phryneta nigropilosa (Aurivillius) in a similar way. 



Pachtstola dectjssata, Chevrolat. 



A single example of this Calabar species. It is hardly a true 

 Pachijstola, the middle tibiae having a. straight outer edge. 



Petrognatha gigas, Fabr. 



A single example, agreeing perfectly with others received from 

 Lagos. 



AcMOCERA UNDTJLATA, Quedcufeldt, Berl. eut. Zeits. 1882, 

 pp. 185, 354. 



Found originally on the Quango river, examples from which 

 locality have been compared with those obtained by Mr. Bonny. 



Olenecamptus hofmanni, Quedenfeldt, Berl. ent. Zeits. 1882, 

 p. 355, t. vi. f, 10. 



Also found on the Quango. 



Frea maculicornis, Thoms. 



A species apparently common in the Gaboon country on the 

 coast. 



DiCHOSTATES (?) BIMACULATUS, n. sp. 



Breviter et Inte ovatus, nigro-nitidus, maculafim alho-griseo-tomen- 

 tosus ; elytvis grosse subconjluenfer jyunctatis, in f undo punctorum 

 solum fomenfosis, utrinque prope apicem macula penicillatn nigra ; 

 thorace hrevi et lata, antice valde rotundatim angustato, laterihus 

 inermi, basi transversim sidmto, wargine basali utrinque valde 

 sinuato ; elytris basi latis, humeris oblique subtruncatis. 

 Long. 11 millim. 



One example. The species belongs to a small group in which the 

 usual lateral tubercles of the thorax are absent. The short ovate 

 and broad form and the short triangular scutellum separate it from 

 Eumimetes. The antennae are as in Dichostates, the scape planed 

 beneath and much shorter than the third joint. In the example 

 described, doubtless a 5 > the antenn;e are shorter than the body and 

 the joints 5-11 short, the last pointed. The presternum is vertical 

 before and behind, and the mesosternum broad and vertical in 

 front. 



Dichostates collaris, Chevrolat. 



Many examples, agreeing with others received from Old Calabar, 

 whence the species was originally described. It is found also at 

 Lagos and Cape Coast Castle, and extends, slightly modified ir\ 



