168 Mil. WALKER ON BIPTERA COLLECTED AT MAKESSAE. 



Gen. Opomtza, Fallen. 



224. Opomyza nigrifinis, n. s. Fam. Cinerea, capite antennisqiie 

 pallida rutis, arista plumosa, thorace bilineato, pectore halteribusque 

 albis, abdoniine fulvo lanceolate apicem versus nigro, pedibus fulvis, 

 alis uigris albo guttatis. 



Female. Cinereous ; head pale red, white beneath ; antennEe pale red, 

 very short, 3rd joint nearly round, arista plumose ; thorax with two 

 indistinct darker lines ; pectus and halteres white ; abdomen lanceo- 

 late, tawny, shining, black towai'ds the tip; legs tawny ; wings black, 

 rather narrow, with about ten white dots, of which two are larger than 

 the others, and form a broken and almost interrupted band near the 

 base ; veins black ; discal transverse vein straight, upright, parted by 

 about half its length from the border ; no prffibrachial transverse vein. 

 Length of the body li-li lines ; of the wings 2^-3 lines. 



Gen. Drosophila, Fallen. 



225. Drosophila solennis, n. s. Mas. Testacea, facie carinata, 

 thorace vittis quatuor fulvis, abdomine fasciis abbreviatis nigricantibus, 

 alis cinereis. 



Male. Testaceous ; face keeled ; antennae wanting ; thorax with four 

 tawny stripes ; abdomen elliptical, a little longer than the thorax, 

 with blackish abbreviated bands ; wings grey ; veins black ; discal 

 transverse vein straight, upright, parted by hardly less than its length 

 from the border, and by about thrice its length from the prsebrachial 

 transverse. Length of the body 1^ line; of the wings 3 lines. 



226. Drosophila rudis, n. s. Mas. Fulva, facie albida, abdomine 

 nigro nitente basi fulvo, pedibus halteribusque testaceis, alis cinereis 

 apud costam obscurioribus maculis quatuor nigricantibus. 



Male. Tawny, testaceous beneath ; face whitish ; antennae wanting ; 

 abdomen elongate-oval, black, shining, tawny at the base, not longer 

 than the thorax ; legs and halteres testaceous ; wings grey, darker 

 along the costa, with four blackish spots, first spot subcostal, larger 

 than the second which is discal, third apical, band between the second 

 and third spots irregular, attenuated hindward ; veins black ; discal 

 transverse vein straight, upright, parted by nearly its length from the 

 border, and by nearly twice its length from the prsebrachial transverse. 

 Length of the body 2 lines ; of the wings 3 j lines. 



227. Drosophila illata, n. s. Fcem. Fulva, segmentorum abdomi- 

 nalium marginibus pedibusqne testaceis, alis cinereis. 



Female. Tawny ; antennae very short, 3rd joint conical, arista thinly 

 plumose ; abdomen oval, not longer than the thorax, hind borders of 

 the segments and legs testaceous ; wings grey ; veins black, tawny at 

 the base ; discal transverse vein straight, upright, parted by about its 

 length from the border, and by nearly four times its length from the 

 praebrachial transverse. Length of the body I3 line; of the wings 2\ 

 lines. 



