448 PERCY SLADEN TRUST EXPEDITION 
almost obsolete; prosternum broad, feebly hollowed down the middle, very deeply 
arcuate-emarginate in front, and with the ante-coxal portion reduced to a narrow strip ; 
mesosternum flattened, large, the meso-metasternal suture transverse, placed midway 
between the intermediate coxe ; ventral segment 2 a little longer than 3 or 4; prothorax 
cucullate at the apex; scutellum small; elytra oblong; all the coxz widely separated ; 
legs long, stout ; femora toothed; tibize strongly unguiculate ; tarsi with the third joint 
bilobed, the first jot of anterior pair elongated, the claws stout, free ; body oblong, 
squamose. 
Type, S. aldabrana. 
The minute insect from which the above definition has been taken may be described 
as an aberrant Cryptorrhynchid with the rostral canal almost obliterated, the coxze widely 
separated, the antennal club large, and the anterior tarsi elongated. The unique type 
may be a male, as it has the anterior tibize angularly dilated within. It is possible that 
the species is not a native of Aldabra. 
66. Scytha aldabrana, n. sp. 
Narrow, moderately convex, piceous, the antennee and the apices of the tarsi 
ferruginous ; variegated with a dense clothing of brownish-cinereous, fuscous, and whitish 
scales, the dark scales condensed into two vittee on the disc of the prothorax and various 
small spots on the alternate elytral interstices, and the whitish scales into a short streak 
on the third interstice at about the middle, the prothorax and the small prominences on 
the alternate interstices also set with a few very short decumbent blackish setz, the legs 
fusco-annulate. Rostrum shorter than the prothorax, densely punctate and squamose at 
the base, for the rest sparsely punctured, bare, and shining. Prothorax convex, nearly as 
long as broad, rounded at the sides, narrowed and constricted anteriorly, bisinuate at the 
base ; densely punctate. Elytra wider than the prothorax, oblong, parallel at the base, 
slightly produced at the tip; punctate-striate, the interstices densely punctate, 3, 5, and 
7 somewhat raised and here and there subfasciculate with small dark sete. Beneath 
densely punctate ; fifth ventral segment arcuate-emarginate at the apex, leaving the sixth 
exposed. Anterior tibiz sinuate, angularly dilated towards the middle within. Anterior 
tarsi elongated, the first joint longer than that of the other legs. 
Length 24, breadth 1 mm, (¢ %). 
Loc. Aldabra: Takamaka (Fryer). 
One specimen, found in November or December, 1908. 
Group Zygopina. 
SPHADASMUS. 
Sphadasmus Schénherr, Gen. Col., vii. 1, p. 290 (1844); Heller, Abhandl. Zool. Mus. 
Dresden, 1892—93, p. 47. 
Eight species of this genus are known from Africa or India. S. granocostatus Fairm., 
is probably not really congeneric. 
