BY FREDERICK A. A. SKUSE. 135 



in the ^, not so prominent as in M. Mastersi; rostrum ferruginous, 

 shining, as long as the head, distinctly constricted before the 

 middle (when viewed from above) ; palpi black ; antenme a little 

 longer than rostrum ; joints and scapus fulvous ; flagellar joints 

 black, the first four subcylindrical, the rest small, linear. Thorax 

 light brown, opaque, sometimes darker towards pronotum, usually 

 traversed by an indistinct ochreous median line ; from humeri 

 to origin of wings greyish-ochreous ; suture dark brown ; pleurae? 

 pectus, and all the coxse with a grey bloom ; scutellum and meta- 

 thorax fulvous. Halteres with brown club. Abdomen in ^ 

 shining, brownish-fulvous, more obscure posteriorly, tlie last two 

 segments of genitalia black ; in ^ slightly covered with a greyish 

 bloom, all the segments, except the first and last, tinged and 

 bordered with blackish, the sixth entirely black ; venter obscure 

 fulvous. Troclianters fulvous. Femora and tibiae fulvous, the 

 latter often brown in the intermediate and hind legs, black at the 

 tip. Tarsi black. All the tarsi less than twice the length of the 

 tibiae. Wings with a pale brownish tint ; anterior border and 

 stigma brown ; first posterior cell and fifth longitudinal vein 

 slightly clouded ; seventh longitudinal vein running close to and 

 parallel with the margin. 



Hah. — Como and Sydney, N.S.W. (Masters and Skuse). 

 Several specimens. 



Obs. — Easily distinguished from the last, which it most 

 resembles, by its less distinct wing-colouring, shorter tarsi, con- 

 stricted rostrum, and the colour of thorax and position of the 

 seventh longitudinal vein. 



^o-' 



430 Macromastix obscurirostris, sp.n. 



(J. — Length of antennse O'lOO inch ... 2.54 millimetres. 



Expanse of wings 0-660xO-140 ... 16-78 x 3-55 



Size of body 0-460 x 0-090 ... 11-70 x 2-27 



$. — Length of antennee 0*075 inch ... 1-89 millimetres. 



Expanse of wings 0600 x 0-140 ... 15-24x3-55 



Size of body 0-460x0-090 ... 11-70x2-27 



