108 



MYCETOPHILID,^. 



However, with regard to these distinctions Johannsen says : — 

 " These characters, while sufficient to separate most of the European 

 species tlius far described, fail utterly for some of the still 

 undescribed North American forms, and for this reason the two 

 genera are combined."* 



G2. Allodia nigrofasciata, sp. uov. (PI. II, fig. 11.) 



c? 5 . Jlead : vertex dark brown or black, with grey pubescence; 

 face blackish or brownish, rest of head including proboscis and 

 palpi, yellow. Antennal scape and base of tlagellum yellow, the rest 

 black. Three or four strong bristles in a row behind upper inner 

 corner of each eye. Thorax varying from reddish brown to 

 black, with rather rough yellow pubescence, sides yellowish, 

 pleurae blackish, slightly dusted with grey. Bristles placed as 

 follows : — several on the humeri of different lengths, three or four 

 very strong ones below each humerus, some moderately strong ones 

 on the anterior and lateral margins of dorsum, a powerful one on 

 each posterior corner of dorsum, and smaller ones irregularly 

 mixed with the soft yellow hairs covering the whole dorsum and 

 along its posterior margin. Scutellum with two strong apical 

 bristles. Abdomen compressed; varying from yellowish to dark 

 brown and with soft pale hairs; dorsum with a broader or 

 narrower black band on the base of each segment, sometimes 

 occupying nearly all the surface, but leaving at least a narrow 

 band on each hind margin, which widens towards the sides, over 

 which the black colour extends for some distance basally. Geni- 

 talia of moderate size ; the large basal joint of each clasper 

 terminating in two narrow flexible finger-like appendages, and 

 between the claspers a pair of branched black hook-like organs. 

 In the female two narrow elongate yellow lamellae are visible. 

 Legs pale yellow, tips of femora, especially on hind pair, a little 

 blackish ; traces of a small dark streak below at base ; tibiae darker ; 

 tarsi blackish. Wings pale yellowish, iridescent ; halteres yellowish 

 white. 



Length 2|-3| millim. 



Described from two males and six females (including type S 

 and § ) in the Indian Museum, from Simla, 10. v. 09 {Vr. Annan- 

 dale) ; also from one from Mundali, Dehra Dun district, 9000 ft., 

 10-12. v. 10 (C. W. Beebe), in the same collection. 



Types in tlie Indian Museum. 



Genus MAC ROBE ACHIUS, Dzied. 



Macrohyachius,DziQdiZ\Qki,'iloi\ Soc. Ent, Ross, xxiii, p. 520 (1889). 



Genotype, M. hoivarzii, Dzied., the only previously known 

 species ; by original designation. 



* Gen. Ins., Fasc. 'J3, p. 10-i (1909). 



