120 WALKER ON DIPTEllA OF AllU ISLANDS. 



arista plumose j thorax with cinereous tomentum, white points along 

 each side ; pectus whitish ; hind borders of the abdominal segments 

 testaceous with cinereous tomentum; tibiae with a dingy whitish 

 band ; tarsi dingy whitish ; wings limpid white, with several blackish 

 marks towards the base and with two broad blackish bands, the first 

 forked in front ; discal transverse vein nearly straight, parted by less 

 than its length from the border, and by more than twice its length 

 from the praebrachial transverse ; halteres white. Length of the 

 body 2^ lines ; of the wings 4 lines. 



144. Trypeta basalis, n. s. Mas. Nigra, nitens ; capite antennisque 

 fulvis, vertice maculis duabus piceis ; abdomine basi pedibusque tes- 

 taceis ; alis limpidis, striga basali, fasciis tribus costaque apicali 

 nigricantibus ; halteribus testaceis. 



Male. Black, slender, shining. Head tawny, with two elongated piceous 

 spots on the vertex ; antennae tawny, third joint linear, rather long, 

 arista bare ; abdomen nearly fusiform, testaceous at the base ; legs 

 testaceous ; wings limpid, with a blackish oblique streak extending 

 from the base, with three blackish bands, and with a blackish costal 

 streak extending round the tip, first and third bands slender, second 

 broad, abbreviated like the first hindward; discal transverse vein 

 straight, parted by about one-fourth of its length from the border, 

 and by less than its length from the praebrachial transverse ; halteres 

 testaceous. Length of the body U line ; of the wings 3 lines. 



145. Trypeta IMPLETA, n. s. Foem. Cinerea; capite albido ; anten- 

 narum articulo tertio albido apice nigro ; thorace vitta fusca, scutello 

 albidO; abdomine nigro ; pedibus albidis nigro fasciatis ; alis albis, 

 maculis plurimis nigricantibus ex parte confluentibus ; halteribus 

 albidis. 



Female. Cinereous. Head whitish ; third joint of the antennae short, 

 conical, whitish, blackish at the tip, arista plumose ; thorax with a 

 brown stripe ; scutellum whitish ; abdomen black ; legs whitish, with 

 black bands ; wings white, with many blackish spots, some of them 

 confluent ; discal transverse vein straight, parted by much less than 

 its length from the border, and by a little less than its length from 

 the praebrachial transverse; halteres whitish. Length of the body 

 H line ; of the wings 3 lines. 



146. Trypeta subocellifera, n. s. Mas. Cana ; antennis albidis ; 

 thorace guttis fuscis, scutelli margine albido ; abdomine fusco apicem 

 versus cano maculis fuscis ; pedibus albidis fusco fasciatis ; alis lim- 

 pidis, maculis nigricantibus pallido signatis ex parte confluentibus. 



Male. Hoary. Antenna3 whitish, third joint short, conical, arista 

 plumose ; thorax with some slight brown dots ; scutellum brown, 

 hind borders of the scutellum white ; abdomen brown, hind borders 

 of the segments and apical part cinereous, the latter with brown dots ; 

 legs whitish, with brown bands ; wings hmpid, with several blackish 



