526 Mr. G. J. Arrow on 
with that genus than with any other. The occurrence of a 
hairy c clothing and of white chalky patches, the shape of the 
scutellum, acutely pointed but not concave at the sides, the 
more slender front tibia and grooved abdomen of the male, 
are features shared with that genus, and the sharply 
bidentate clypeus, although not of the form characteristic 
of Gnathocera, may be considered to be the more primitive 
type from which that of Gnathocera has been derived. The 
broad flat sternal process and the very feeble excision of the 
outer margins of the elytra suggest relationship to the Cera- 
torrhina group with horned males, but the form of the 
female, even more than that of the male, precludes that 
conclusion; while affinity with Porphyronota and allied 
genera is negatived by the strongly accentuated sexual 
differences. 
Perhaps the most distinctive of the many peculiar features 
of the new genus is the elongation and flattening of the 
extremities of the elytra, which entirely conceal the abdo- 
men from above. The outer margins are minutely serrated 
on their posterior half and uniformly rounded to the sutural 
angle, which is sharp but not spiniform. In the angle there 
is a tuft of the pale-coloured sets, which are extremely fine 
and scanty upon the remainder of the upper surface. The 
elougation of the elytra is more pronounced in the female 
than in the male. In addition to this the pygidium of the 
female is very oblique, the abdomen very convex, the tibize 
much stouter than those of the male, and the tarsi much 
shorter. The chalky-white patches are not present in the 
ouly female examined. 
Gnathocera nigrolineata, sp. n. (Pl. VIII. fig. 3.) 
Nigra, nitida, pedibus abdomineque rufis, albo-tomentosa, capitis 
medio, pronoti marginibus et lineis duabus longitudinalibus 
elevatis, scutello, linea mediana excepta, elytrorum marginibus 
et lineis duabus elevatis postice conjunctis, pygidii apice et linea 
mediana, corporis subtus linea mediana, femoribus partim, tibiis 
tarsisque totis nudis, capite pronotoque setis nonnullis minutissi- 
mis instructis, thorace subtus femoribusque sat parece fulvo- 
vestitis, abdomine nudo, processu sternali gracili, curvato. 
Long. 16 mm. ; lat. max. 8°5 mm. 
Frencu Guinea: Kondia. 
A single female specimen of this species was taken upon 
a termites’ nest by Prof. F. Silvestri, by whom it has been 
presented to the British Museum. 
It is a very distinct species, resembling no other at 
present known in the black and white striping of the elytra. 
