816 DIPTERA OF AUSTRALIA, 



than the thickness of the cylindrical ones. The verticils are not 

 stiff, but appear slightly crimpled. Legs long and very slender 

 (in T. gracilicornis two and a-half times the length of the wings) ; 

 the intermediate pair very little shorter than the other pairs. 



Wings narrow, very cuneiformly so towards their base, fringed 

 with long cilia on the posterior border ; the hairs on the veins long 

 enough to reach from vein to vein, causing the wings to appear 

 very hairy. Auxiliaiy vein very short in T. te7iuiGornis, extending 

 only to opposite the middle of the praefurca ; while in T. gracili- 

 co7'nis it reaches beyond the marginal cross-vein ; in both cases it 

 seems to eventually amalgamate with and form a thickening of 

 the costa. The sub-costal cross-vein seems entirely wanting ; I 

 could not detect it in wings denuded of hair and mounted in balsam. 

 The discal cell when open coalesces with the third posterior cell, 

 that is, the anterior branch of the fourth longitudinal vein is 

 forked. The first bifurcation of the fourth longitudinal vein 

 begins considerably before the small cross-vein, as in Molophilus. 

 Second sub-marginal and first posterior cells about equal in length, 

 their bases situated about as much before the inner end of first 

 sub-marginal as that of the discal (or third posterior) cell is before 

 theirs. The seventh longitudinal vein is straight and short, and 

 runs close to the margin; in T. tenuicornis it so short that it 

 ceases opposite the origin of the fourth longitudinal vein. 



This genus seems intermediate hetyveen Molophilus BXi&Einojytera, 

 but differs from both especially by the antennae. I have not seen 

 any female examples, which may possible possess short antennae. 



338. Tasiocera tenuicornis, sp.n. (PI. xxi., fig. 13). 



(J. — Length of antennae 0*210 inch ... 5*33 millimetres. 



Expanse of wings O'UO x 0-033 ... 3-55 x 0-84 



Size of body 0-110 x 0-016 ... 2-79x0-40 



Head, including palpi, rostrum and antennae brown ; palpi and 

 joints of scapus sometimes pale brown, or greyish-ochreous ; first 

 four flagellar joints cylindrical, the first very long and twice the 



