166 Mr. R. Shelford on new 
Bantua ferow, sp.n. (Pl. X. fig. 25.) 
?. Piceous, nitid. Head cribrate-punctate; distance 
apart of eyes less than length of first antennal joint; antennz 
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. Mesonotum  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°38 mm.; pronotum 8x10 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 Jess extent there 
is enough material to form a fold or channel. A diagram- 
matic section through the front part of the pronotum of 
B, feroz will resemble Pl. IX. fig. 10, D, but a similar section 
through the hinder part will resemble PI. LX. fig. 10, C. 
Genus PILEMA, Sauss. 
Pilema mombase, sp.n. (Pl. X. figs. 22, 23.) 
2. Piceous, nitid. Head with face rugose and slightly 
