LIST OF DIPTERA. 801 



Duomyia thalassina, n. s. fern. Cyaneo-viridis, capite ferrugineo, 

 antennis nigris, pedibus ferrugineis, femoribus viridibus, tarsis 

 fulvis, alis subfulvis. 

 Head ferruginous, pitchy about the base of the feelers, pale yellow 

 in front ; grooves of the feelers almost white : eyes red, not hairy : 

 sucker black, clothed with short tawny hairs ; palpi black, beset with 

 black bristles; feelers black; slightly convex above and beneath, 

 rounded at the tip : chest and abdomen dark bluish-green, thinly 

 covered with tawny down : chest shagreened ; scutcheon smooth, 

 shining: abdomen punctured, obconical, shorter and narrower than 

 the chest: legs ferruginous, clothed with short pale hairs ; hips and 

 thighs green ; tips of thighs tawny ; feet tawny, darker towards the 

 tips : claws black : wings with a tawny tinge, which is deeper on the 

 fore borders ; wing-ribs and veins tawny ; scales yellowish white with 

 tawny borders ; structure of the veins like that of D. obscura. 

 Length of the body 5 — 6 lines ; of the wings 11 — 12 lines. 



Chromatomyia, n. g. 



Head without bristles; face large, forming a ridge; epistoma 

 prominent: sucker large: feelers shorter than the face ; third joint 

 rather long; bristle long, slender, not hairy, its first joint obsolete, 

 second very short : structure of the wing-veins like that of Duo- 

 myia. 



Chromatomyia, formosa, n. s., fern. Ferruginea, thoracis disco 

 abdomineque cyaneis, antennis ferrugineis, articulo 3° piceo, 

 pedibus jerrugineis, tarsis subnigris, alis limpidis, basi costa 

 venarumque marginibus fulvis. 



Head ferruginous, thinly clothed with short tawny hairs ; eyes 

 pitchy, not hairy ; sucker ferruginous ; palpi tawny, beset with 

 black bristles : feelers ferruginous, not more than half the length of 

 the face; third joint pitchy, slightly convex above and beneath, 

 rounded at the tip, nearly twice the length of the second joint ; 

 bristle black, tawny at the base, nearly twice the length of the third 

 joint ; its third joint stout for less than one-fourth of the length, very 

 slender from thence to the tip ; chest and breast ferruginous, thinly 

 clothed with short tawny hairs ; disk of the chest blue, including a 

 tawny stripe on the fore part ; abdomen bright blue, smooth, shining, 

 obconical, a little shorter and broader than the chest: legs ferru- 

 ginous, clothed with short tawny hairs ; feet blackish ; foot-cushions 

 dull tawny: wings colourless, tawny at the base, and on the fore 



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