166 Mr. E. Slielford on new 



Banfua fero.v, sp, n. (PI. X. fig. 25.) 



? . Piceous, nitid. Head cribrate-punctate ; distance 

 apart of eyes less than lengtli of first antennal joint ; antennse 

 castaneous ; ocelli, labrum, and maxillary palpi rufo-testa- 

 ceous. Pronotum rugose, lateral bands anteriorly deflected 

 inwards, posteriorly strongly produced backwards, and bent 

 downwards at a right angle to the disk of the pronotum ; a 

 broad channel dorsally separates the posterior part of the 

 band from the disk; the disk of the pronotum anteriorly is 

 tuberculate, posteriorly with a few deep punctures, posterior 

 margin dentate. Mesonotura rugose, cribrate-punctate ; 

 posterior angles tumid, produced, anterior angles depressed 

 and fitting beneath the posterior angles of the pronotum. 

 Metanotum less deeply punctate; posterior angles tumid, 

 produced. Abdomen rather wider than thorax, finely punc- 

 tate above and beneath, a narrow anterior zone on each 

 tergite and sternite impunctate ; supra-anal lamina trape- 

 zoidal, posterior margin slightly reflected. Cerci testaceous. 



Total length 27*8 mm. ; pronotum 8 X 10 mm. 



Nyika Mts., 6000-7000 feet, Nyasaland {A. Whyte, July 

 1896). 



Type in the British Museum. 



The pronotal structure of this species is of great interest, 

 for whilst anteriorly the lateral bands lie under the disk, 

 forming a very acute angle with it, as is characteristic of a 

 typical Bantua, posteriorly they are vertical and form more 

 or less of a right angle with the disk, as is characteristic of a 

 typical Pilema. Correlated with this torsion of the lateral 

 bands is the entire absence of the pronotal gutter or channel 

 anteriorly, whilst posteriorly it is deep and plainly visible. 

 The structure illustrates quite clearly that the bending under 

 the disk of the lateral bands brings about the obliteration of 

 the gutter ; speaking rather metaphorically, the material of 

 which the pronotum is composed is stretched taut by the 

 rotation inwards of the lateral bands, so that the fold in the 

 material disappears ; where the rotation is of less extent there 

 is enough material to form a fold or channel. A diagram- 

 matic section through the front part of the pronotum of 

 B.ferox will resemble PI. IX. fig. 10, D, but a similar section 

 through the hinder part will resemble PL IX. fig. 10, C. 



Genus Pilema, Sauss. 

 Pilema momhasce, sp. n. (Pl. X. figs. 22, 23.) 

 ? . Piceous, nitid. Head with face rugose and slightly 



