Mr. 0. G. Lamb on Exotic Cliloropidae. 49 



proper family as Hemisphtprisoma (III., p. 47). The syno- 

 nymy was given by de Meijere in Tijd. v. Ent. (vol. Ivi. 

 p. 571). lu both cases the specific name selected for the 

 typc-s[)ecies had been politiis, but for some reason de Meijete 

 clianj^ed it to beckerl, though both types were the same 

 species. 



C. poUta, de Meij. 



Specimens in Bur. Coll. from Taliparamba, Malabar, 

 with the uote : — " In ginger-stems attacked by Dichocrocis." 



CUROMATOPTERUM, Beclc. 



Chromatopterum lacteiventre, sp. n. 



This species has the pubescent arista of the Indian species 

 C. pubescens, Becker (III., p. 82), but its facies is that of the 

 African C. dtlicutum, Becker (II., p. 413). 



Head (top view) : — Frons almost entirely covered by the 

 brilliant shining black "triangle/' which has its sides con- 

 tiguous with the eyes and a rounded front margin reaching 

 to the autennal base ; its sides converge slightly to the 

 front ; the only part of the frons left uncovered by it are 

 two small, dull orange, triangular patches each side in front; 

 tile surface is broadly and sliallowly depressed ; the ocellar 

 hump is slightly raised and carries chestnut-coloured ocelli. 

 Side-view : — Tiie semicircular eyes cover the whole, pro- 

 jecting beyond the face and leaving practically no lower 

 jowls and only a small hind eye-border, which is shining 

 black, as is the whole hind head. The antennal 3rd joiut is 

 almost orbicular, just a little longer than deep, orange on 

 lower half, blackened on top ; arista inserted basally, hair- 

 like except for the small pale basal joint, finely pubescent ; 

 2nd joint yellow. Face darkened orange ; palpi black. 



Thorax (including scutellura and pleura) all shining 

 black, the dorsum just before the scutellum and thescutellum 

 itself very lightly dusted with orange pollen; the rounded 

 and slightly swollen scutellum witli moderately long sliglitly 

 divergent end-bristles and a few accessory side-liairs. 



Wings with venation as figured by Becker (II., tab. xiii. 

 fig. 10), but the blackening is ditferent ; the front blackening 

 is confined to the first part of first vein, the space between 

 it and where the auxiliary vein would be (like a long stigma), 

 and the thickened black costa itself, from which a faint 

 suffusion runs on to the neighbouring cell ; the end spot is 

 smaller and discrete, it touches the costa midway between 



Ann. d; Mag. N. Hist. Sor. 8. Vol xix. 4 



