191 1.] E. Brunetti : Neiv Oriental Nemocera. 269 



Dixa bifasciata, mihi, sp. nov. 



9 . Western Himalayas. Long, nearly 3 mm. 



Head. —The broad flat vertex light grey dusted, through which 

 the dark ground colour can be seen. Proboscis yellowish brown, 

 palpi long, concolorous. Antennae with its two scapal joints very 

 distinct, dark brown; flagellum brown, except the pale yellow 

 extreme base of the first joint. 



Thorax pale yellowish. Three dark brown stripes of normal 

 pattern, the outer ones continued much further forward than in 

 the last species. Dorsum between the stripes greyish. Scutellum 

 yellowish, metanotum dark brown. Sides of thorax yellowish, 

 brown marked. 



Abdomen blackish, with whitish pubescence ; belly similar. 



Legs pale yellowish, knees almost imperceptibly black, tarsi 

 darker. Hind tibiae with the slight incrassation at the tip as usual, 

 l^ut yellowish. 



Wings very pale grey, a rather dark brown narrow short 

 streak in the centre over the cross-veins, not extending to the 

 posterior cross- vein. A pale blackish streak filling the basal half 

 of the anal cell. Halteres pale yellow. 



Described from a single 9 taken by Dr. Annandale at Phagu 

 (9,000 ft.) in the Simla di.strict. 12-V-09. 



Type in Indian Museum, 



Notes. — This species is very near bislriala, and may possibly 

 be identical with it. The differences lie in the respective lengths of 

 the ist scapal joint and in the lengths of the thoracic stripes; the 

 femora and tips tips, black ringed in one species and practically 

 all yellow in the other. The wing marks in the two species may 

 be difterentiated as follows : In bijasciata the central streak stops 

 before or at the posterior cross-vein, this vein itself not being at 

 all suffused, whilst in bistriata the suft'usion is continued narrowly 

 to the posterior margin. The basal pale streak in the anal cell 

 is much more distinct in bifasciata than in bistriata. When placed 

 side by side the two forms appear distinct, although the descrip- 

 tions read so similar. 



BIBIO\'IDAE. 



PLECIOMYIA, mihi, gen. nov. 



Type Penthetria inelanaspis, Wied., Auss. Zweifl., i, 72 (1826) 

 Plecia melanaspis, auct. 



Allied to Plecia, W., from which it differs by the 4th longitu- 

 dinal vein rather broadly forking immediately at the point of con- 

 tact with the anterior cross- vein. 



The 3rd longitudinal vein forks almost immediately bej-ond 

 the anterior cross-vein, the upper branch lying almost parallel to 

 the lower one. 



A third but lesser character is the presence of twelve joints 

 to the antenna, two short normally shaped basal ones forming 



