WALKEU ON DIPTERA OF ARF ISLANDS. 129 



with a slight fawn-coloured tinge, tip black, sexualia very small ; legs 

 reddish, femora striped above with black, tarsi black, reddish at the 

 base ; wings cinereous, blackish towards the tips ; halteres testaceous. 

 Length of the body 8 lines; of the wings 14 lines. 



G-en. Ommatitjs, IlUger. 

 4. Ommatius noctifer. Walk. See page 88. 



Fam. EMPID^, Leach. 

 Gen. Htbos, Fahr, 



6. Hybos deficiens, n. s. Mas. Niger, thorace fulvo globose ma- 

 cula dorsali nigra, abdomine basi fulvo, pedibus anterioribus testaceis, 

 feraoribus posticis subtus spinosis, alis cinereis apice obscurioribus, 

 stigmate venisque nigris, halteribus testaceis, apice piceis. 



Male. Black. Thorax and pectus tawn}'^, the former globose, with a 

 black dorsal spot ; abdomen tawny at the base ; anterior legs tes- 

 taceous, hind femora spinose beneath ; wings grey, darker at the 

 tips ; stigma and veins black ; halteres testaceous, with pieeous tips. 

 Length of the body 2 lines ; of the wings 4 lines. 



Fam. STRPBIDM, Leach. 

 Gen. Eeistalis, Latr. 



6. Eristalis resolutus. Walk. See p. 95. 



Gen. Baccha, Fahr. 



7. Baccha purpuricola, n. s. Foem. Purpureo-fulva ; capite eha- 

 lybeo ; antennis rufis ; pedibus fulvis ; tibiis posticis apice tarsisque 

 posticis basi piceis ; alis nigricantibus, apud costam obscurioribus, 

 spatio apicali subcostali cinereo ; halteribus testaceis. 



Female. Tawny, tinged with purple. Head chalybeous ; antennae red ; 

 legs tawny, hind tibiae pieeous towards the tips, hind tarsi pieeous 

 towards the base ; wings blackish, darker along the costa, cinereous 

 towards the tips with the exception of the costa ; halteres testaceous. 

 Length of the body 5^ lines ; of the wings 9 lines. 



Fam. MUSCID^, Latr. 



Subfam. Sarcophagides, Walk. 



Gen. Sarcophaga, Meigen. 



8. Sarcophaga basalis, n. s. Mas. Nigra, subaureo tomentosa; 

 capite aurato ; thorace vittis tribus nigris ; abdomine albido tessel- 

 lato ; alis cinereis ; venis lurido marginatis ; alulis testaceis. 



9* 



