116 ME. WALKEE ON DIPTERA COLLECTED AT MAKESSAE. 



verse vein straight ; halteres tawny. Length of the body 2i lines ; of 

 the wings 4 lines. 



76. DoncHoPUs PROVECTUS, n. s. Fcem. Viridis, capite pectoreque 

 argenteis, antennis nigris latiusculis basi testaceis, thorace vittis duabus 

 nigris, abdomine fasciis argenteis, pedibiis nigris, robustis spinosis, 

 tibiis testaceis, alls obscure cinereis. 



Female. Bright green ; head in front and pectus silvery white ; antennae 

 black, rather broad, testaceous towards the base ; 3rd joint conical ; 

 arista much longer than the antennaj ; thorax with a black stripe on 

 each side ; abdomen with silvery white bands ; legs black, stout, spi- 

 nose ; tibiit; testaceous ; wings dark grey ; veins black ; prfebrachial 

 vein forming a very obtuse angle at its flexure, straight from thence 

 to the border ; discal transverse vein straight. Length of the body 

 2\ lines ; of the wings 4 lines. 



77. DoLiCHOPUS PRiEMissus, n. s. Mas. Obscure viridis, capite 

 pectoreque cinereis, antennis nigris, abdomine viridescente-nigro, pedi- 

 bus nigris vix spinosis, tibiis ferrugineis, alis obscure cinereis, hal- 

 teribus fulvis. 



Male. Approaches the Psilopi in some of its characters. Dark green ; 

 head in front and pectus cinereous ; antennae black, very small and 

 short ; 3rd joint conical ; arista as long as the breadth of the head ; 

 abdomen greenish black ; legs black, hardly spinose or setose ; tibise 

 ferruginous ; wings dark grey ; veins black ; praibrachial vein hardly 

 bent between the straight discal transverse vein and the border ; hal- 

 teres tawny. Length of the body 2 lines ; of the wings 31 lines. 



78. DoLiCHOPUS PROVENiENs, u. s. Fam. Obscure viridis, capite 

 albo, antennis nigris, thorace vittis duabus pectoreque cinereis, ab- 

 domine cyanescente-viridi fasciis cupreis, pedibus nigris, femoribus 

 anterioribus apice tibiisque fulvis, alis nigricantibus, haltcribus fulvis. 



Female, Dark green; head white in front and about the eyes; antennae 

 black ; 3rd joint round ; arista shorter than the breadth of the head ; 

 thorax with two cinereous stripes ; pectus cinereous ; abdomen bluish 

 green, with cupreous bands ; legs black ; tibiae and tips of anterior 

 femora tawny ; wings blackish ; veins black ; praebrachial vein quite 

 straight ; discal transverse vein straight, parted by twice its length 

 from the end of the subanal vein ; halteres tawny. Length of the 

 body 2 lines ; of the wings 4 lines. 



Geu. Cheysotus, Meigen. 



79. Chrysotus exactus, n. s. 3/as. Obscure viridis, cinereo-tomen- 

 tosus, antennis pedibusque nigris, abdomine obscure cupreo, tibiis 

 anticis fulvis, alis cinereis. 



Male. Dark green, with cinereous tomentum ; antennae black ; 3rd 

 joint conical ; arista much shorter than the breadth of the head ; ab- 

 domen dark-cupreous ; legs black ; fore tibiae tawny ; wings grey ; 



