Dr. G. A. K. Marshall on Alcides, Schonh. 155 



inner (on interval 3), whereas in delta they are equal or 

 nearly so. The rostrum is proportionately much shorter, 

 and the apical edge is shallowly emarginatc in the middle. 

 The dorsal outline of the prothorax is much more convex, so 

 that the basal margin is well below the plane of the apical. 

 The elytra are proportionately shorter, the basal transverse 

 impression being much deeper, so that the dorsal outline is 

 strongly convex; intervals 3 and 4 are not so markedly 

 costate at the base, and the scales that form the pale 

 markings are much smaller, most of them being very deeply 

 fringed at the apex. 



Length 10-13^ mm., breadth 4^-5^ mm. 



Ceylon : Dikoya, 4000 ft. (type), and Bogawantalawa, 

 5000 ft. {G. Lewis) ; Kandy (E. E. Green). 



The deeply sinuous dorsal outline of this species renders 

 it easily recognizable. It appears to be the mountain 

 representative of A. delta in Ceylon. 



Alcides siamodelta, sp. n. 



? . Closely resembling Pascoe's figure of A. triangulifer 

 (I. c), except that the shoulders of the elytra are produced 

 outwardly into a sharp angle. Other distinctions are : — In 

 triangulifer the 7th joint of the i'unicle is elongate and equal 

 to or longer than the club (4: 3-4), in the transverse pale 

 band forming the base of the triangle on the elytra the 

 intervals are distinctly granulate, the apical setse on the 

 tibiae are reddish, and the tarsal claws have the inner divi- 

 sion unusually short and slender; in siamodelta the 7th 

 joint of the funicle is transverse and distinctly shorter than 

 the club (2| : 4), the intervals are not granulate in the 

 transverse band of the elytra, the apical setse on the tibiae 

 are blackish, and the tarsal claws are normal, the inner 

 division being about three-fourths the length of the outer. 



Length 9^-10^, breadth (at shoulders) 5|-6 mm. 



French Indo-China: Laos (type) ; Siam. 



Alcides triangulifer, Kirsch. 



So far as I know at present this insect is confined to 

 the Malay Peninsula, Burma, and the Nicobars. Insects 

 recorded from Borneo under the name of A. delta will 

 probably be found to belong to a distinct species. 



Alcides javanodelta, sp. n. 

 c? ? . Apart from its narrower form and shorter rostrum, 



