90 WALKEE ON DTPTERA OF ARU ISLANDS. 



nigro, thorace subvittato, abdominis segmentis nigro fasciatis, alis 

 sublimpidis apud costam flavescentibus, venis fusco latissime margi- 

 natis, stigmate nigro-fusco. 

 Male and Female. Lutescent. Head of the female black, shining; 

 thorax with two brown bands which are paler and indistinct hind- 

 ward; abdomen with a broad black band on each segment; tarsi 

 blackish towards the tips ; wings nearly limpid, yellowish along the 

 costa, veins exteriorly with very broad brownish borders, stigma 

 blackish brown. Length of the body 3^ lines ; of the wings 6 lines. 



Fam. BOMBYLID^, Leach. 



Subfam. Theeevi-tes, Walk. 



48. Thereva congrua, n. s. Mas. Nigra, glaucescente albo tomen- 

 tosa, albo pilosa, capite argenteo, thorace trivittato et bilineato, pedi- 

 bus nigris, femoribus albis, alis cinereis stigmate elongato venisque 

 nigris. 



Male. Black, with glaucous-white tomentum and with white hairs. 

 Head silvery in front ; thorax with three blackish brown stripes, the 

 middle one with a dark stripe on each side, broader and more distinct 

 than the lateral pair ; abdomen beneath and legs black, femora white ; 

 wings grey, with an elongated black stigma and black veins ; halteres 

 black. Length of the body 5 lines ; of the wings 8 lines. 



Subfam. Bombtlites, Walk. 



G-en. Antheax, Fahr. 



49. Anthrax pelops, n. s. Mas. Ferruginea, thoracis margine rufo 

 piloso, pectore abdomineque nigris, abdomine fasciis duabus, maculis 

 duabus apicalibus, plagaque ventrali subtrigona argenteis, alis cine- 

 reis, basi costaque nigris. 



Male. Closely allied to A. Tantalus. Dark ferruginous. Head above, 

 antennae, pectus, abdomen, and legs black ; thorax bordered with red 

 hairs ; pectus with a silvery dot on each side ; abdomen with red hairs 

 on each side at the base, with two silvery bands, with two silvery 

 apical spots, and with a ventral, nearly triangular, silvery patch; 

 wings cinereous, black at the base and along five-sixths of the length 

 of the costa, veins and halteres black. Length of the body 8 lines ; 

 of the wings 18 lines. 



60. Anthrax semiscita, Walk. See Vol. I. p. 118. 



51. Anthrax degenera. Walk, See Vol. I. p. 15. 



Gren. GrEEON, Meigen. 



52. Geron simplex, n. s. Mas. Ater, antennis pedibusque nigris, 

 alis subcinereis, halteribus fulvis. 



