Bering. 89 



thus widening the vertex considerably ; occiput dark ; antennas 

 pale yellow, tip of 3rd joint, which has a slight reddish tinge, 

 shortly pubescent ; 1st and 2nd joints with one or two micro- 

 scopic hairs. Thorax with dorsum brilliant metallic greeu, with 

 very short pale yellow pubescence ; venter similarly coloured and 

 pubescent, sharply delimited from the dorsum by a narrow yellow 

 side-ridge at the level of the wings ; posterior calli yellowish. 

 Scutellum and metanotum brilliant green, the former with pale 

 yellow hairs and yellow underside. Abdomen dorsally violet, not 

 intense, shining, and with a bluish tinge in certain lights, with 

 pale yellow pubescence; the colour covers all the surf ace except 

 a narrow, irregular, yellow border round the edges ; venter yellow, 

 shortly pubescent. Legs wholly yellow, except a broad brown 

 ring on distal half of hind fomora, and the blackish hind meta- 

 tarsus. Wings clear, stigmatic area pale yellow ; halteres deep 

 yellow. 



Length, 3 mm. 



Described from two § £ in good condition in the Indian 

 Musenm, from Margherita, Assam, and Paresnath, Chota Nag-pur, 

 4400 ft., v.1909 {Dr. Jenkins). 



Subfamily BERINiE. 



Mead semicircular ; eyes large and prominent, bare or hairy ; 

 antennae with 3rd joint moderately elongate and more or less 

 cylindrical, but not conspicuously so, with eight annul ations and 

 no apical style or arista. Thorax roughly oblong; scutellum 

 generally with four or six marginal spines, occasionally eight, and 

 in individuals an odd number may occur ; pubescence of thorax 

 continued over spines. Abdomen with at least seven obvious seg- 

 ments, longer than thorax, dorsum flattened, sides approximately 

 parallel. Legs simple, moderately strong ; 1st joint of hind tarsi 

 generally dilated in <$ ; spurs on middle tibia? in rare cases.* 

 Wings not of the normal Stratiomyid type, all the veins, except an 

 occasionally" obviously abortive one, running out to wing-margin ; 

 2nd vein short, beginning opposite base of discal cell, ending near 

 tip of 1st ; 3rd vein forked, both branches ending before wing- 

 tip ; 4th vein with only two terminations (as in Pachyga stride), 

 as the 5th vein forms the hinder side of the discal cell ; posterior 

 cross-vein therefore absent ; anal cell closed at some distance 

 from wing-border ; squamae small. 



This subfamily is easily distinguished from all others except 

 XvLOMTiNiB by the 7-segmented abdomen and by the anterior 

 veins not being crowded together ; whilst from the XiEOMYiNiE it 

 is separated by the 2nd vein (praefurca) originating opposite the 

 base of the discal cell instead of at some considerable distance 

 before it, also by the open 4th posterior cell. Their usually 



* Acanthomyia , for instance, a European genus. 



