DIPTERA 75 



Fam. BORBORIDAE. 



BoRBORUS Meigen. 



(i) Borborus bilineatus, sp. nov. 



t ?. Long. corp. 2 mm. ; al. 2 mm. Front dark olive-brown with a light central 

 stripe, face yellowish-grey, proboscis and antennae black, arista bare. Thorax dark 

 olive-brown, with two somewhat paler stripes, pleurae and scutellum concolorous, 

 halteres light yellow. Abdomen blackish, the second segment in the male about twice 

 as long as the third. Legs blackish-brown, the fore femora short and rather stout, 

 covered with greenish-grey tomentum, intermediate and hind legs, especially the tarsi, 

 rather long and slender, hind metatarsus about as long as but much thicker than the 

 succeeding joint. Wings hyaline, veins yellowish-brown ; middle transverse vein near 

 the base of the discal cell, last two sections of the fourth vein equal, fifth vein just 

 projecting beyond the posterior transverse vein. 



Hab. Hawaii, Kona, one male and one female, 4000 ft., July 1892. 



LiMosixA Macquart. 



(i) Liiuosiiia I'cualicia Osten-Sacken. 



Borborus vcnalicius O.-Sack., Cat. Dipt. N. Amer. 2nd ed. p. 263 (1878). 

 Borborus venalicus [sic] Williston, Tr. Hnt. Soc. Lond. 1896, p. 434, pi. xiv. 

 f. 163. 



t %■ Long. corp. 2^^ mm. ; al. 2^ mm. Front reddish-yellow to reddish-brown, 

 a central line, some small spots marking the insertion of the fronto-orbital bristles and 

 two spots on the occiput immediately behind the ocelli silvery-grey ; face yellowish- 

 brown, shining ; proboscis and palpi yellowish ; antennae reddish-brown, third joint 

 darker at the tip, which is obtusely pointed and dusted with whitish tomentum, arista 

 distinctly pubescent. Thorax dark brown, a median line and the insertions of the 

 macrochaetae whitish-cinereous, the markings at the insertion of the dorso-central 

 bristles sometimes continued forward to the anterior margin of the thorax as a more or 

 less interrupted whitish line, humeri also spotted with whitish-cinereous : pleurae more 

 reddish, variegated with whitish-cinereous ; metanotum reddish-brown, more yellowish 

 at the sides ; scutellum reddish or dark brown, with two triangular spots at the base, 

 a diamond-shaped spot between them and two small round spots marking the insertions 

 of the apical bristles, light cinereous ; halteres yellowish. Abdomen blackish-brown, all 

 the segments edged behind with whitish-cinereous. Legs yellow, all the tibiae with two 

 brown rings, last two joints of all the tarsi and the bases of the hind metatarsus and 

 succeeding joint fuscous. Wings yellowish-hyaline, veins yellow, but darkened at the 



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