WALKEE ON DIPTEBA OF ABU ISLANDS. 101 



abdomen tawny, short-oval, not longer than the thorax, with a black 

 stripe which does not extend to the tip, third and fourth segments 

 with a white band along each fore border ; legs very stout, femora 

 tawny ; wings cinereous, white and with testaceous veins at the base, 

 blackish along the costa, and with a broad black band which is ab- 

 breviated hindward, praebrachial vein forming an obtuse angle at its 

 flexure, from whence it is very' slightly curved inward to its tip, 

 discal transverse vein nearly straight, parted by much less than its 

 length from the border, and by hardly less than its length from the 

 flexure of the praebrachial ; alulas whitish. Length of the body 3^ 

 lines ; of the wings 6 lines. 



Subfam. Dexides, Walk. 

 Gren. EuTiLiA, Desv. 



88. Rutilia plumicornis, Gueririf Macq. Dipt. Exot. 11. 3. 82. 3. 

 PI. 9. f. 8. 



Inhabits also Off'ak, New Guinea. 



89. Rutilia angustipennis, n. s. Foem. Nigro-viridis, capite ci- 

 nereo frontalibus atris, thoracis lateribus subpurpurascentibus, scu- 

 tello purpureo, abdomine viridi basi purpureo, tibiis ferrugineis, alis 

 angustis lanceolatis obscure fuscis basi nigris. 



Female. Blackish-green. Head cinereous, frontalia deep black, widen- 

 ing much towards the face, epistoma very prominent, arista stout, 

 bare ; thorax with almost obsolete stripes, purplish along each side ; 

 scutellum mostly purple ; abdomen dark green, purple at the base ; 

 legs black, tibia3 ferruginous ; wings narrow, lanceolate, dark brown, 

 black towards the base, praebrachial vein forming a much rounded 

 angle at its flexure, near which it is slightly curved inward, and is 

 thence straight to its tip, discal transverse vein very slightly undu- 

 lating, parted by less than half its length from the border, and by 

 much more than half its length from the flexure of the praebrachial ; 

 alulae dark brownish cinereous. I/cngth of the body 8 lines ; of the 

 wings 16 lines. 



Gren. Dexia, Meigen. 



90. Dexia PECTORALis, n. s. Fcem. Testacea, capite pectore que albis 

 frontalibus atris, antennis fulvis, thorace cinereo vittis quatuor nigris, 

 abdomine fulvo apicem versus spinoso fasciis duabus nigris, pedibus 

 longis tibiis tarsisque nigris, alis cinereis venis subfusco late mar- 

 ginatis. 



Female. Testaceous. Head white, frontalia deep black, widening to- 

 wards the face, facialia without bristles, epistoma prominent; an- 

 tennae tawny, not reaching the epistoma, third joint of the antennae 

 long, linear, arista plumose ; thorax cinereous, with four black stripes, 

 of which the inner pair are much narrower than the outer pair ,* scu- 



