54 -Mr. 0. G. Lamb on Exotic Cliloropidse. 



more shining spots extending from hind onelius to the outer 

 angles of the triangle. The hind hfad 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 8rd ; face somewhat concave ; antennae as fig. 11, but the 

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

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

 palpi yellow. Face whitish, unkeeled, but depressed, the 

 actual facial ridges being marked with a narrow pale grey 

 line ; autennal pits well marked with dark shining chitinous 

 edges. 



Thorax: dorsum dull i)alish orange ; a broad 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 line^ rounded and abbreviated front 

 and back, 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 centrally, sides orange, not 

 flattened, a little hairy, pair of tern)inal bristles ; meta- 

 iiotum darkened ; the pleura all rather shining pale yellow, 

 with 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 siecimens (1 (^,2 ?) of a 

 remarkable insect from Melville Island which exhibits 

 marked sex-dimorphism. 



Characters common to both sexes : — Texture horny, 

 macrochsetes quite absent, though body hairy ; scutellum 

 very large, s-wollen, standing in profile well above the 

 thoracic level (see fig. 14), Avith 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 



