624 DIPTEEA OP AUSTRALIA, 



to the head (as in Sceptonia) ; densely covered with short longi- 

 tudinally disposed hairs ; setiferous about the origin of the wings ; 

 scutellum semi-circular, with long setae ; metanotum very short, 

 steep, gibbose, almost hidden by the scutellum. Abdomen with 

 six segments in both sexes ; somewhat flattened ; narrower than 

 the thorax ; narrowing at the base and apex ; genitalia not con- 

 spicuous in either sex. Legs robust ; coxse broad ; femora short, 

 broadly flattened, especially the hind pair; tibige spurred, the fore 

 pair without lateral spines, interuiediate pair with three ranges of 

 strong spines on the outer and one on the inner side, hind pair 

 with three ranges of rather stronger spines on the outer side ; 

 intermediate and hind tarsi spinulose. . Wings about the length 

 of the entire body, elongate, rounded off" at the base ; micro- 

 scopically pubescent, the hairs not arranged in longitudinal rows. 

 Auxiliary vein short, complete, bent anteriorly ; costal vein not 

 extending beyond the tip of the third longitudinal vein and not 

 reaching the apex of the wing ; small cross-vein situated much 

 before the middle of the first longitudinal vein ; petiole of the 

 second posterior cell very short, equal in length to cross-vein ; 

 inner end of second posterior cell acute, situated opposite inner end 

 of submarginal cell ; fork of the fifth longitudinal vein very long, 

 narrow, acute at the base, with the branches straight, its inner 

 end situated before the middle of the anterior basal cell ; sixth 

 longitudinal vein short, incomplete ; seventh strong, complete. 



Ohs. — Allied to Mycetophila, Meig. ; differing in the shape of 

 the thorax and in the venation of the wings, and at once dis- 

 tinguished by the length of the fork of the fifth longitudinal vein 

 and the complete seventh longitudinal vein. 



481. Delopsis plavipennis, sp.n. (PI. xix., fig. 7). 



(J. — Length of antennae 0-050 inch ... 1-27 millimetres. 



Expanse of wings 0-120 x 0-045 ... 3-04 x 1-13 



Size of body 0-120x0035 ... 3-04x0-88 



