WALKER ON DIPTERA OF AETJ ISLANDS. 91 



Male. Deep black. Eyes bright red ; proboscis a little longer than the 

 thorax ; antennae and legs black ; wings slightly greyish, veins black ; 

 halteres tawny. Length of the body 2\ lines ; of the wings 5 lines. 



Fam. EMPIDO^, Leach. 



Gen. Htbos, Fair. 



63. Hybos b I CO lor, n. s. Mas. Fulvus, ore antennisque testaceis, 

 abdomine, femoribus posticis apice tibiisque anticis piceis, tarsis ante- 

 rioribus ferrugineis, alis obscure cinereis. 



Male. Tawny. Mouth and antennae testaceous j abdomen, hind femora 

 at the tips, and fore tibiae piceous, anterior tarsi ferruginous ; wings 

 dark grey, veins black. Length of the body 3i lines ; of the wings 

 7 lines. 



Fam, DOLICHOPID^, Leach. 



Gen. PsiLOPTJS, Meigen. 



54. Psilopus aeneus, Fahr. Syst. Antl. 268. 9. 

 Inhabits also Java. 



55. Psilopus benedtctus, n. s. Mas et Fcem. Aureo-viridis, facie 

 pectoreque argenteis, antennis testaceis apice nigris, thorace vittis 

 tribus cupreis, abdomine fasciis cupreo-purpureis, maculis lateralibus 

 albidis, pedibus testaceis tibiis posticis tarsisque nigris, alis subcine- 

 reis, costam versus et apud venas transversas nigrofuscis, halteribus 

 testaceis. F(Em. Vertice cyaneo-purpureo, abdomine fasciis cyaneis. 



Male and Female. Golden green. Face silvery; antennae testaceous, 

 black towards the tips, arista full as long as the thorax ; thorax with 

 three cupreous stripes ; pectus silvery ; abdomen with cupreous purple 

 bands and with whitish spots along each side ; legs testaceous, tarsi 

 and hind tibiae black ; wings slightly greyish, blackish brown along 

 the costa and about the transverse veins, veins black, fore branch 

 of the praebrachial vein curved inward, discal transverse vein undu- 

 lating ; halteres testaceous. Female. Vertex bluish purple ; abdomen 

 with blue bands. Length of the body 4-4^ lines; of the wings 

 7-8 lines. 



56. Psilopus lucigena, n. s. Mas. Aureo-viridis, facie pectoreque 

 argenteis, antennis tarsisque nigris, thorace vittis tribus rufo-cupreis, 

 abdomine fasciis cupreo-purpureis, femoribus lutescentibus, tibiis 

 piceis, femoribus anticis apice nigricantibus, ahs nigris apice albis, 

 halteribus fulvis apice nigris. 



Male. Golden green. Face and pectus silvery ; antennae black, arista 

 longer than the thorax; thorax with three broad reddish cupreous 

 stripes ; abdomen with broad cupreous purple bands ; femora lutes- 

 cent, tibiae piceous, fore femora blackish towards the tips, tarsi 



