484 PERCY SLADEN TRUST EXPEDITION 
has the widened apical portion of the rostrum much longer than the parallel-sided 
basal portion; the head long, depressed and strongly foveate between the prominent 
eyes, and constricted at some distance behind them ; the prothorax abruptly constricted 
before the apex ; and the first ventral segment sulcate down the middle. Length 53mm. 
There are two specimens of O. fusiforme from Ceylon in the British Museum, and 
O. elongatum, Pasc., from Singalang, seems to me to be scarcely separable from them. 
ORTHOTEMNUS. 
Orthotemnus Wallaston, Trans. Ent. Soc. Lond., 1878, pp. 489, 575. 
The type-species of this genus, O. reflexus, is widely spread in the Malayan Islands. 
A second, from Silhouette, in the Seychelles, has been captured by Mr Scott. Both 
insects have the apical margin of the elytra recurved, so as to appear deeply sulcate 
within. 
116. Orthotemnus filiformis, n. sp. 
Very elongate, narrow, somewhat convex, flattened on the disc, moderately shining, 
black, the antennz and legs piceous. Head and rostrum closely, finely punctate; rostrum 
stout, curved, about half the length of the prothorax, convex, the convexity continued 
backwards to the sharply-defined post-ocular constriction of the head, the head feebly 
foveate between the eyes, the latter large and prominent. Prothorax much longer than 
broad, subconical, strongly constricted before the apex; closely, somewhat coarsely 
punctate, except along an abbreviated narrow space down the middle, the interspaces 
finely alutaceous. Scutellum minute, narrow. Elytra elongate, of the same width as 
the base of the prothorax, parallel to near the apex, the apices conjointly round and 
with the margin sharply reftlexed; punctate-striate, the sutural stria sulciform, the 
interstices flat and obsoletely uniseriate-punctate. Beneath feebly shining, closely, 
finely punctate; anterior coxee widely separated; metasternum compressed laterally, 
broadly flattened and canaliculate down the middle; first ventral segment similarly 
flattened. Tibiz mucronate at the inner apical angle, the anterior pair sinuate and 
ciliate ‘within. 
Length 35 mm. (2). 
Loc. Seychelles: Silhouette. 
One specimen, from the forest near Mont Pot-a-eau, VIII. 1908. Smaller and 
narrower than O. reflexus, the rostrum and antenne shorter, the prothorax conical, the 
elytra parallel to near the apex. 
Cossonus. 
Cossonus [Clairville], Ent. Helv., i. p. 58 (1798). 
A genus of world-wide distribution, particularly numerous in species in Tropical 
America. Two species only are represented in the Seychelles collection before me, 
both known §.-African forms. 
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