94 WALKEB ON DIPTEEA OF ARU ISLANDS. 



two yellow spots on each side in front ; scutellum yellow ; pectus 

 with an oblique yellow band on each side ; abdomen not petiolated, 

 with a tumid yellow spot on each side at the base, hind borders of 

 the third and fourth segments yellow ; femora at the tips and tibiae 

 yellow, the latter piceous towards the tips, tarsi piceous ; wings 

 greyish-black towards the costa, excepting a lurid costal streak which 

 extends along half the length from the base ; halteres testaceous. 

 Length of the body 6 lines ; of the wings 11 lines. 



65. Ceria relicta, n. s. Fcem. Nigra, faciei lateribus abdominisque 

 fasciis duabus flavis, antennis ferrugineo variis, pedibus fulvis, alis 

 cinereis costam versus nigris, halteribus stramineis. 



Female. Black. Head yellow, beneath and in front with the exception 

 of a black stripe on the disk of the face ; first and third joints of the 

 antennae somewhat ferruginous, arista white ; thorax with two indi- 

 stinct yellowish marks on the transverse suture, hind border of the 

 scutellum and hind borders of .the second and third abdominal seg- 

 ments yellow ; legs tawny, tibiae paler towards the base ; wings 

 green, black for nearly half the breadth from the costa ; halteres 

 straw-colour. Length of the body 6 lines ; of the wings 11 lines. 



This may prove to be the female of C relictura, notwithstanding its 

 great difference from that species in the marks of the thorax and of 

 the abdomen, and in the colour of the legs. 



Gen. MiCEODON, Meig. 



66. MiCRODON FULVicoRNis, n. s. Mas. Niger, aureo-subpubescens, 

 antennis, abdoraine, pedibus halteribusque fulvis, femoribus nigris, 

 tibiis nigro vittatis, alis fuscis postice cinereis. 



Male. Black. Head with gilded pubescence, cinereous behind and be- 

 neath ; antennae tawny, second joint above towards the tip and third 

 joint piceous ; thorax slightly covered with gilded tomentum ; pectus 

 with cinereous tomentum ; abdomen with gilded tomentum towards 

 the tip ; legs tawny, femora mostly black, tibiae with black stripes ; 

 wings cinereous, dark-brown about the costa, veinlet which bisects 

 the subapical areolet incomplete, as it is also in the following species ; 

 halteres tawny. Length of the body 6 lines ; of the wings 12 lines. 



6']. MiCRODON APicALis, u. s. Mas et Foem. Niger, aureo-pubes- 

 cens, thorace abdomineque fasciatis, pedibus halteribusque fulvis, 

 alis nigro-fuscis postice obscure cinereis. 



Male and Female. Etlack, with gilded tomentum, which forms two 

 bands on the thorax, and one on each side of the pectus ; abdomen 

 with three gilded tomentose bands, the third subapical, first segment 

 ferruginous beneath ; legs tawny, femora at the base and coxae black ; 

 wings blackish-brown, dark cinereous hindward ; halteres tawny. 

 Length of the body 5-6 lines ; of the wings 10-12 lines. 



