850 DIPTERA OF AUSTRALIA, 



somewhat, though not conspicuously, lai-ger spot at the tip of most 

 of the veins and at origin of prsef urea ; and a still larger, pro- 

 minent, more or less wedge-shaped marking, based on the costa at 

 tip of auxiliary vein and terminating at small cross-vein ; veins 

 brown or brownish ; stigma elongate, pale. Auxiliary vein joining 

 costa or first longitudinal* vein a short distance beyond inner end 

 of first sub-marginal cell ; sub-costal cross-vein near its tip ; 

 prsefurca moderately long, arcuated, or even angulated, at its 

 origin ; petiole of first sub-marginal cell short, about equal in 

 length to great cross- vein ; branches of second longitudinal vein 

 and the third longitudinal arcuated downwards ; second sub- 

 marginal and first posterior cells equal in length ; small cross- 

 vein somewhat arcuated ; marginal cross-vein usually pale, situated 

 a short distance from tip of first longitudinal vein ; second posterior 

 cell about two- thirds the length of third posterior ; discal cell some- 

 what wider at its distal end, not long, its inner end situated a little 

 before that of first posterior cell ; great cross-vein at the middle 

 or nearer the distal end ; all the veins terminating on posterior 

 margin slightly arcuated at the tip; seventh longitudinal vein 

 distinctly arcuated at its tip. 



Hah. — Sydney and Blue Mountains, N.S.W. (Masters and 

 Skuse). Six specimens. October. 



Ohs. — This and the following species, L. interventa^ are closely 

 allied, and I have also a damaged specimen of another undescribed 

 species with marbled wings which is nearly related. L. antiqua 

 and interventa agree in the structure and markings of the antennae, 

 head and thorax, etc., differing principally in the venation and 

 markings of the wings. In L. interventa the veins only are spotted. 



357. LiMNOPHILA INTERVENTA, Sp.n. (PI. XXII., fig. 24). 



9- — Length of antennae....... 0*140 inch ... 3*55 millimetres. 



Expanse of wings 0-450 x 0-095 ... 11-42 x 2'39 



Size of body 0-400 x 0-040... 10-16 x 1-01 



* It is impossible to decide which is the tip of the auxiliary vein and 

 which the sub-costal cross-vein. 



