136 ME. E. E. AUSTEX OX >EAV DIPTEROUS IXSECTS. [Jan. 17, 



species like B. rubrieosa, WiecL, and B. conjnacta, Wied., iu the 

 same geuus as B. elongata, Fab., ^\'llen, for instance, \A"liat Fallen 

 called tSccfva hyalhnita is distinguished generically from tSi/rjiJius 

 rihesii, Linn., or when Oci/piamus, Macq., is allowed to retain its 

 independence. 



Group I. 



Baccha kubilipennis, n. sp. (Plate lY. figs 7, 9, (5 § , and 

 Plate V. fig. 14, head of S ■) 



S $ . Length : J 12J to 14^ mm., § 12§ to 13| mm. 



Face and cheels yellow, with yellow pollen and pale yellow pile. 

 Cheeks iu cJ sometimes narrowly blackish immediately below the 

 eyes. A prominent, rounded, and sharply-defined facial tubercle, 

 commencing halfway down the face ; sometimes an indistinct 

 brown stripe between it and the antennae. Antennai orange ; third 

 joint large, ovate, larger in the $ than in the J • A very pro- 

 nounced antenniferous process, shining black above, and orange- 

 yellow immediately above the base of the antennae ; the orange- 

 yellow area is larger in the $ ; the projection is truncate and 

 flutt'ened in front, and pilose on the sides oidy. Front in c^ 

 greenish black, with yellow pollen, and A-ertical triangle black; iu 

 $ shining black, with a narrow triangular area on each side in 

 front yellow polhnose. Pile on front blaclvi>h in (S , yellowish in 

 2 , shorter in the latter than iu the former. Occiput with a fringe 

 of pale yellow hairs. Thorax shining black ; the collar of hair in 

 front pale yellow ; elsewhere nearly bare. Humeri and postalar 

 callosities brownish ; pleurce with a broad vertical stripe of golden 

 pollen in front of the suture; the stripe has a reddish ground; 

 pleurae behind the wings silvery pollinose. iScuieUum polished 

 dark brown on the disc, more or less yellowish, semi-translucent, 

 behind. General colour of the ahdomeu metallic black (browner in 

 $ ), sometimes with a distinct bluish sheen; the abdomen is 

 broadest iu the fourth segment. The first segment has outstandiug 

 pale yellow hairs on each side ; elsewhere the abdomen is clothed 

 with very short appressed black pile. First segment black, 

 browner and with an edging of yellow in the $ ; second segment 

 with a yellow basal band, notched in the median line behind, and 

 with an interrupted brownish-yellow band near the tip, the latter 

 often scarcely visible iu the cS ; third serjment ivlth a conspicuous 

 transverse yellow band, occupying about the middle third of the 

 segment, but slightly nearer the base ; the remaining segments 

 wholly metallic black ; male genitalia small and concealed. Lys 

 orange-yellow ; posterior femora slightly darker, dark brown abo\e 

 and below on the distal halt", but orange at the tips ; posterior tibiae 

 reddish on basal third, then dai'k brown ; posterior tarsi dark brown 

 on basal two-thirds of first joint, then whitish yellow. Winys 

 infuscated, dark brown in the middle, and usually darker in the J 

 than in the 2 ; i'l the 5 the wings show a faint secondary infusca- 

 tion at the tips, above the third vein ; an area at the base on the 



