408 PERCY SLADEN TRUST EXPEDITION 
The small forms of Cycloterinus are very difficult to see on the dead Worma 
and Northea leaves, owing to their flattened form and cryptic coloration. They are 
frequently found sitting on the sides of the raised midrib and other veins of the 
“Bois Rouge” (Wormia) leaves. They did not appear to be abundant in Silhouette 
in the season of the S.E. Trade-winds (July—September 1908). Several species were 
found in that island, but only in small numbers: [a specimen of one of them 
(C. ampliatus) was bred from a larva found in the rotting substance of the base of 
a fallen palm-leaf|, These insects were abundant in the forests of Mahé in November 
and December 1908, and it was then that the great series of some species (eg. 
C. unicristatus) were principally accumulated. Examples were frequently found in coitu 
on the dead leaves. They were much scarcer again in the forests behind Cascade 
in January and February 1909. It was several times observed that there were, in 
the sides of the midribs of the leaves, little holes each surrounded by a tiny pile of 
leaf-substance reduced to dust; and it is possible that these were the work of the 
small forms of Cycloterinus, which are probably connected with the dead leaves 
throughout their life-cycle. (Cf. Scott, “Eight Months Entomological Collecting m 
the Seychelles Islands,” Vol. xiv. of these Transactions, 1910, pp. 29—30.) 
TANYOMUS, n. gen. 
Head globose, polished, the eyes small, depressed, transverse, placed low down imme- 
diately behind the base of the rostrum; rostrum arcuate, long in 3, shorter in ?, constricted 
at the base, the antenns inserted near the tip, the scrobes inferior, deep, extending 
to beneath the eyes; funiculus 7-jointed, joint 1 elongate, the others decreasing 
in length; prothorax subglobose, constricted near apex; scutellum wanting; elytra 
subscutiform, the humeri acutely produced anteriorly ; prosternum bituberculate between 
the rather narrowly separated anterior coxe, the anterior portion long; metasternum 
very short, without visible episterna; ventral segments 1 and 2 long, connate, 3 and 4 
together longer than 5, the sutures straight; femora unarmed; tibiz straight on 
their outer edge, each with a curved hook at the apex arising from near the outer 
angle, the anterior pair broadly produced inwards at the apex and with a short tooth 
at the inner angle in both sexes; tarsi clothed with long projecting hairs, spongy- 
pubescent beneath, joint 3 with two narrow divergent lobes of unequal length, the 
claws long and divergent ; body apterous, setose, elongate, subfusiform. 
Type, 7. palmicola. 
The remarkable insect forming the type of this genus is not unlike a large black 
Erirrhinus. The anteriorly produced spiniform humeri make the elytra appear conjointly 
arcuate-emarginate at the base. The rostrum is longer, stouter, and more rugose 
in the male than in the female. The bituberculate prosternum and the asymmetrically 
lobed third tarsal jomt are also characteristic, the last-mentioned character, however, 
is also to be found in two species of Cycloterinus, to which the present genus is 
nearly related. 
