698 DIPTERA OP AUSTRALIA, 



the base of the fork ; cross-vein thick ; petiole very pale, almost 

 as long as the anterior branch of the fork ; branches running 

 almost parallel, a little divergent at the tips ; posterior branch 

 very little arcuated at the base. Jg about 5 times the length of 

 gh,; kl shorter than Im. 



Hob. — Sydney (Skuse). January. 



117. SCIARA EVANESCENS, Sp.n. 



9. — Length of antennae 0-030 inch ... 0-76 millimetre. 



Expanse of wings 0080 x 0030 ... 2-02 x 076 



Size of body 0075x0 015 ... 1-87 x 0-38 



Antennae slender, not as long as the head and thorax together, 

 umber-brown, with a short, dense, yellowish pubescence; joints 

 of the scapus lighter brown, sparsely pubescent ; flagellar joints 

 sub-sessile, 1-^ times as long as broad, the terminal joint vei'y 

 slender and almost twice the length of the joint immediately 

 preceding it. Head black, levigate. Eyes contiguous above. Palpi 

 light brown. Thorax deep brown, almost black, levigate, with 

 three longitudinal double rows of V)rownish-yellow hairs, the 

 intermediate row very indistinct, stopping before the middle, the 

 lateral ones sparse, not extending quite to the scutellum and not 

 coalescent ; some long hairs between the origin of the wings and 

 the humeri, also on the scutellum. Halteres deep brown, the 

 base of the stalk brownish-yellow ; a few very short hairs about 

 the base of the club. Abdomen deep umber-brown, almost black 

 on the lust few .segments, rather densely clothed with a moderately 

 long pale pubescence ; lamellae of the ovipositor small, deep 

 brown, oval. Legs pitch-brown, the tibiae, and particularly the 

 tarsi, darker on account of their dense pubescence. The tibiae 

 and tarsi of the fore-legs short, of equal length ; in the inter- 

 mediate-legs the tibiae and tarsi a little longer than the last, the 

 tibiae being about \ longer than the tarsi ; in the hind-legs the 

 tibiae ] longer than the tarsi. Spurs as long as the fourth tarsal 

 joint. First joint of the tarsi in the fore- and intermediate-legs 



