54 Mr. C. G. Lamb on Exoiic Cliloropidse. 



more shining spots extending from liind ocellus to the outer 

 angles of the triangle. The hind head is orange except for a 

 large black patch extending from the base of the triangle. 

 Side-view (fig. 13) : — All pale whitish yellow, the side of 

 frons orange ; eyes very nearly circular ; jowls about depth 

 of Mrd ; face somewhat concave ; antennae as fig. 11, hut the 

 arista for its last -H is very faintly white pubescent, not bare 

 as fignnd, 3rd joint orange with blackened tip ; tongue and 

 palpi yellow. Face whitish, uid<eeled, but depressed, the 

 actual facial ridges being marked with a nan-ow pale grey 

 line ; antennal pits Meli marked with dark shining chitinous 

 edges. 



Thorax : dorsum dull palish orange ; abroad black central 

 stripe from neck to end of scutellum — this is very intense 

 up to about the middle of the dorsum, then gets much 

 fainter, till it is very faint on the scutellum ; each side is 

 another uniformly black iine_, rounded and abbreviated front 

 and l)aek, and diminishing that way in breadth ; below is 

 another very thin blackened line extending forward from 

 just above the wing for about | the pleural length. Scu- 

 tellum (as above) suffused centrailv, sides orange, not 

 flattened, a little hairy, pair of terminal bristles ; meta- 

 notum darkened ; the pleura all rather shining pale yellow, 

 witli a small elongate spot. 



Wings normal, clear, with brown-orange veins, the 

 distance between cross-veins about equal to the last part of 

 5th ; halteres with whitish knobs. 



Legs long, all yellow except for the last two darkened 

 tarsal joints. 



Abdomen shining brownish orange, with very narrow 

 pale segmental margins ; venter paler. 



Size 4^ mm. 



Cam. Coll., Durban (F. M.). 



Pemphigonotus, gen. nov. 



In the Bur. Coll. are three s) ecimens (1 ^J, 2 ?) of a 

 remarkable insect from Melville Island which exhibits 

 marked sex-dimorphism. 



Characters common to both sexes : — Texture horny, 

 raacroeha'tes quite absent, though body hairy ; scutellum 

 vei'y large, s\»ollen, standing in profile veil above tlie 

 thoracic level (see fig. 14), with a flattened area of different 

 texture; abdomen oval and flattened ; wings with very long 

 discal cell (see fig. 14), the auxiliary and anal veins just 

 visible as " shadows " of veins ; legs long ; antenna like that 





