486 PERCY SLADEN TRUST EXPEDITION 
119. Rhyncolosoma dubsum. 
Phleophagosoma dubiwm Gahan, Monogr. Christmas Isl., p. 114 (1900). 
Somewhat fusiform, convex, shining; nigro-piceous, reddish brown, or obscure 
ferruginous. Head sparsely, the rostrum closely, finely, punctate, the punctures becoming 
much coarser between the eyes, the inter-ocular space depressed, the rostrum parallel- 
sided, about twice as long as broad, pilose beneath. Prothorax oblongo-conic, a little 
longer than broad, rounded at the sides posteriorly, feebly constricted near the apex, 
coarsely, closely punctate. Elytra moderately long, about as wide as the prothorax, 
subparallel in their basal half; very coarsely punctate-striate, the interstices narrow, 
convex, rugulosely punctate. Beneath very coarsely, closely punctate, the punctures 
on the prosternum more or less confluent, those on the ventral segments sometimes more 
scattered, the prosternum with a curved ridge in front of each anterior coxa; first 
ventral segment broadly depressed down the middle in ¢. 
Length 24—38 mm. (49). 
Loc. Seychelles: Mahé, Silhouette, Félicité. Christmas Island (Indian Ocean). 
The above description, taken from the long variable series captured by Mr Scott, 
will supplement that of Mr Gahan. In the Seychelles the insect was found freely 
under bark in the mountain-forests. In Silhouette a number were found at 1500 feet 
or more in the forest near Mont Pot-a-eau, and one also in the forest near Mare aux 
Cochons: in Mahé a number were taken in the forests near Morne Blanc, and specimens 
were also found in the high forests behind Trois Fréres and above Cascade Estate: in 
Félicité several were found in the forest. 
TETRAGONORRHAMPHUS, nN. gen. 
Rostrum flattened, nearly as wide as the head, broad, subquadrate, obsoletely 
bituberculate at base (¢), feebly arcuate-emarginate at the apex, leaving the tips of the 
mandibles exposed, the antenne inserted at the middle, the scrobes lateral, oblique, 
reaching to beneath the eyes; eyes small, lateral, oval, prominent, the head somewhat 
exserted and feebly constricted behind them; antenne short, the scape reaching to the 
posterior margin of the eyes, the funiculus seven-jointed, joint 1 stout, 2—7 transverse, 
closely articulated, widening outwards, the club small, ovate, sparsely pilose, annulate, the 
basal half polished ; prothorax oblongo-conic ; scutellum flattened, subquadrate, polished ; 
elytra oblong, crenato-sulcate ; coxee widely separated; prosternum with a large, oval, 
sharply-defined, flattened space extending forwards to the apex ; legs short ; femora stout, 
clavate; tibiee flattened, subtriangular, produced into a long curved hook at the outer 
apical angle, the anterior pair acutely rectangular or with a short tooth at the inner 
apical angle and armed with a short tooth on the inner edge towards the apex ; tarsi 
short, jot 3 rounded-triangular, much wider than 2, not lobed, pilose at the apex, the 
claw-joint slender, moderately long, the claws minute; body moderately elongate, 
depressed, shining, glabrous, winged. 
Type, T. tuberculirostris. 
The small insect from which the above diagnosis has been drawn up is one of the 
a 
