396 R. OSTEN SACKEN 



and femora, reddish-yellow. Thoracic dorsum with a semi-ap- 

 pressed fulvous pubescence. The outer spine of the front tibiae 

 at least twice as long and much stronger, than the inner one ; 

 they are dark reddish-brown. Wings brownish , darker along 

 the anterior margin ; this darker tinge fills out the costal , an- 

 terior basal and marginal cells, and invades the anterior portion 

 of the first posterior cell, reaching along the third vein, nearly 

 as far as the tip of the wing; but the interval between the 

 auxiliary and the first veins is much paler ; the stigma is re- 

 presented by a yellowish streak ; the second posterior cell is 

 sessile. 



Hah. Hatam, New Guinea (Beccarij, July 1875); a single 

 female. 



NB. Resembles ruficoxis Macq. and suhslituta Wk. , but is 

 easily distinguished by its red femora. 



Bibio plecioides n. sp. 9- Body and legs (including coxae) 

 black ; thorax yellowish-red ; wings dark brown. Long. corp. 

 6-7 mm. 



Coloring of Pkcia fulvicotlis; head, including antennae ; legs , 

 including coxae , and abdomen black ; the latter opaque, the head 

 shining : knob of halteres brown, the stem paler. Thorax alto- 

 gether of a pale reddish-yellow, densely beset on the dorsum 

 with a fine, short, golden-yellow pubescence. The outer spine 

 of the front tibiae nearly three times as long, and much stron- 

 ger, than the inner one. Wings brown, darker along the costa ; 

 stigma dark brown ; second posterior cell sessile ; the extreme 

 root of the wings is tinged with reddish- yellow. 



Hah. Hatam, N. Guinea, July 1875 (Beccar i); two females. 



NB. The short description of Bibio bicolor Walker, List etc. 

 I, 121 (East-Indies) might be identified with this species, ne- 

 vertheless that species is different ; unfortunately I lost the 

 notice containing the statement of the difference, which I took 

 in the Brit. Mus. 



I venture to describe this species and the preceding, although 

 I have only females, for the reason that the fauna of the Ar- 



