404 Dr. G. A. K. Marshall on new 
strongly curved at one-third from the base, the outer margin 
sinuate in the apical half, the inner margin with a very 
large laminate tooth, the posterior edge of which is broadly 
flattened, the posterior tibie simple; the front coxe 
obtusely tuberculate in the g@. Sternum with the space 
between the front cox as broad as that between the middle 
pair. 
Length 8°75-11 mm., breadth 3:25—4 mm. 
Sumatra: Merang ( W. Doherty). 
Described from six specimens. 
~ Most nearly allied to A. sellatus, Fst., a narrower species, 
which has a common broad sutural stripe on the basal third 
and the dark area surrounding it is much dilated behind 
(parallel-sided in swbsellatus); the prothorax is as long as 
broad and a little narrower than the elytra; the saddle-like 
basal depression on the elytra is much deeper; the 7th jomt 
of the funicle is longer than the club, ete. 
Alcides arcicollis, sp.n. (Pl. VII. fig. 8.) 
¢. Form subcylindrical; integument black, with pale 
markings formed of broad plumose scales covered with 
yellow powdering; the pronotum with a mediau stripe which 
is broad in the basal half and rapidly narrows in front, 
reaching only the subapical constriction, and the broader 
lateral stripes more oblique than usual and curving inwards 
in front so as to unite before reaching the apex, thus form- 
ing a regular arch ; the elytra with a sutural stripe from 
the base to the middle, which in its basal half covers the 
space from the suture to stria 2, but in the apical half the 
inner edge gradually diverges outwards, leaving interval 1 
bare; another rather shorter, narrower, and oblique stripe 
starting at the base on interval 6 and ending on interval 5 ; 
a broad postmedian band, curving forwards (but not widen- 
ing) at the sides, reaching the lateral margin at about the 
middle, and continuing to the base as a stripe covering the 
space between strie 9 and 10 inclusive, and no apical 
patch ; the lower surface rather densely clothed with plu- 
mose scales and yellow powder. 
Head closely and strongly punctate, with a small frontal 
fovea and with an impressed line round the upper edge of 
each eye. Rostrum elongate, cylindrical, slightly dilated at 
the apex, gently curved, and with a downwardly projecting 
tooth on the submentum ; with coarse, longitudinally con- 
fluent punctation from the base to the antennz, which are 
inserted well beyond the middle, the apical area shiny and 
