160 Mil. WALKEK ON DIPTERA COLLECTED IN AMBOYNA. 



52. MuscA FERRUGINEA (gcniis Oclivomyia, Desv.). Faun. Fulva, 

 cinereo-subtomentosa, capite albo, palpis pallidis, abdomine apicem 

 versus cyanescente purpureo, tibiis apice tarsisque nigvis, alls cine- 

 reis, costa exteriore diffuse fusca. 



Ochromyia ferruginea, Dol. Nat. Tijd. Ned. Ind. 1867. 414. 



Female. Tawny, with slight cinereous bloom, paler beneath. Head 

 white about the eyes and in front, cinereous on the vertex. Palpi 

 pale. Antennae wanting. Abdomen broader but not longer than the 

 thorax, bluish purple towards the tip. Tibiae towards the tips and 

 tarsi black. Wings grey, diffusedly brown along the exterior part of 

 the costa ; prsebrachial vein forming a scarcely obtuse angle at its flex- 

 ure, beyond which it is slightly curved inward; discal transverse vein 

 curved towards the prsebrachial, parted by less than half its length 

 from the border, and by much less than its length from the flexure of 

 the prsebrachial. Length of the body 4 lines ; of the wings 8 Unes. 



53. MuscA INCONCLUSA, n. s. Mas. Cinerea, capite albido lateribus 

 ferrugineis, palpis antennis pedibusque nigris, thorace lineis tribus 

 indistinctis nigricantibus, abdomine elliptico subtessellato linea dorsali 

 tenui nigra, genubus rufescentibus, alis cinereis, alulis albis, halteribus 

 testaceis. 



Male. Cinereous. Head whitish in front, somewhat ferruginous on 

 each side of the epistoma, which is prominent. Palpi and antennae 

 black ; the latter not reaching the epistoma ; arista plumose.' Thorax 

 with three indistinct blackish lines. Abdomen elliptical, not longer 

 than the thorax, slightly tessellated, with a slight black dorsal line. 

 Legs black; knees reddish. Wings grey; veins black, testaceous at 

 the base ; prtebrachial vein forming a very obtuse angle at its flexure, 

 beyond which it is hardly curved inward ; discal transverse vein hardly 

 vmdulating, parted by half its length from theborder, and by less than 

 its length from the flexure of the praebrachial ; alulae white ; halteres 

 testaceous. Length of the body 3 lines; of the wings 6 lines. 



Subfam. Anthomyides, Walk. 



Gren. Aricia, Macq. 

 64. Aricia significans, Walk. See vol. iii. p. 107. 



Gen. Ophyea, Meig. 



55. Ophyra RiPARiA. Mas. Nigra, nitens, capite antico albido gut- 

 tis duabus argenteis, antennarum articulo 3° lineari, abdomine nigri- 

 cante-aeneo, alis subcinereis. 



Ophyra riparia, Dol. Nat. Tijd. Ned. Ind. 1858. 



Male. Black, shining. Head whitish in front, with a silvery white dot 

 above the antennae. Third joint of the antennae linear, more than 

 twice the length of the 2nd, not near reaching the epistoma ; arista 



