SCIABA. 133 



and practically exactly in the middle of the wing. Legs pale 

 dirty brown. 



Length 2-5 millim. 



Described from specimens in the Indian Museum from Darjiling, 

 4-7. viii. 09 (type, Paivd) ; Kurseong, 7. ix. 09, 4-8. vii. 08, 

 and Ghoom, 7500 ft., Darjiling district, 19. ix. 08 ; Siliguri, 

 18-20. vii. 07 ; near Bhowali, Kumaon, 5700 ft., vii. 1909 

 (Imms) ; TJkhrul, Manipur, 640U ft. Also from some in my own 

 collection from Darjiling, 10-16. x. 05, and Shanghai, 9. v. 06 (both 

 taken by me), and from Ohiya, Ceylon (E. E. Green). 



Types in the Indian Museum. 



Two females examined by me from Kurseong, 26. vi. 10, and 

 Ghoom, 19. ix. 08, "Lave the prothorax distinctly yellowish. 



Twenty specimens in the Indian Museum agree in venation 

 exactly, and mainly so in the characters they have in common 

 with nigripennis, being moreover uniformly less in size than 

 that species. The form may at least provisionally be regarded as 

 distinct. 



89. Sciara longinervis, sp. nov. 



5 . Though allied to S. fratercula in general appearance, the 

 single example of this form, in the Indian Museum, is distinguished 

 by the 1st longitudinal vein extending to two -thirds the length 

 of the wing, much beyond the fork of the 4th vein, being (with 

 the 3rd longitudinal also) rather nearer the costa than usual, also 

 being deeper and thicker than the remaining veins; petiole of 4th 

 vein very slightly longer than the branches. Femora pale dirty 

 brown. 



Length 3 millim. 



Described from two females in the Indian Museum, from Siliguri, 

 18-20. vii. 07(type)&ud Kurseong, x. 1910 (D'Abreu). A female in 

 the Pusa collection from Mussoori, viii. 1906. 



The general " facies " of the insect is that of a different species, 

 but it may prove to be an aberrant form of S. nigripennis. 



Notes on the S. nigripennis group. The forms I group with 

 nigripennis are diversifies, fratercula, exacta, and longinervis. 

 Their inter-relations, so far as I observe them, are comprised in 

 the preliminary table of species, yet they may be found difficult of 

 differentiation by that means, from the very nature of the 

 distinguishing characters, and the acknowledged variability of 

 these. The forms may possibly represent varieties of a single 

 species, although this is very doubtful, from the fact that, ex- 

 cepting the unique female of longinervis from Siliguri, none of them 

 is confined to a special locality. Of the eight localities represented 

 by the five forms, nigripennis occurs in five, diversipes in four, 

 fratercula in two, exacta in six ; these localities, be it noted, being 

 fairly widely separated either by distance or by altitude. More- 

 over, the fact that one sex (the female) is present in all the forms 



