BY ARTHUR WHITE. 37 



This species shows some variation in the black cloud- 

 ing of the wings, which, though always present, is darker 

 and more extensive in some specimens 1 than in others. 



L. actuosus can be easily distinguished from L. nitidi- 

 frons by the clouded wings with a prominent stigma, by 

 the femora being red beneath, the interrupted hind- 

 margins to the second, third, and fourth abdominal seg- 

 ments, the broader abdomen, the uniform colouring of 

 the thorax, and the shorter proboscis ; from L. segnis by 

 the longer abdomen, by the femora being red beneath, 

 instead of entirely deep black, and by the tibiae being 

 reddish-black, instead of extensively orange. 



L. actuosus frequents logs in the bush, in which situa- 

 tions the males are by no means uncommon ; the flies 

 are very active and quick on the wing. The female is 

 very seldom met with ; the only two specimens that I 

 have found were frequenting a small pool in the bed of 

 a dried-up creek in the bush. My dates range from 

 November 15 to March 1. 



LONCHORHYNCHUS SEGNIS, Sp. IIOV. 



Thorax black ; abdomen short, black, the second, third,, 

 and fourth segments with white hindmargins, which are 

 broadly interrupted with black in the centre ; femora deep 

 black ; tibiae with basal two-thirds orange, apical third 

 black ; wings clouded with brownish-black. 



Length. Male, 6-7 mm. 



Hab. Bagdad Valley, Bellerive. 



Male. Face grey, short. Front black, rugose, long and 

 nloping. Proboscis* black, rather short, thicker than the 

 antennae, and reaching to about, the end of the first anten- 

 nal joint. Palpi grey with white hairs. Antennae black, 

 the first joint about three times the length of the second, 

 which is extremely small, the third a little longer than 

 the first and second together, expanded in the middle, 

 and apparently terminated by a minute style. Eyes bare 

 and somewhat widely separated. Thorax deep black, bare, 

 with sometimes, faint indications of longitudinal lines; 

 scutellum black, with two terminal black bristles. Abdo- 

 men bare, short, with a truncate appearance, which is 

 caused by the shortness of the genitalia; the second, third, 

 and fourth segments with a white hindmargin, which is 

 broadly interrupted with black in the centre. Legs with 

 the femora deep black ; tibiae with basal two-thirds orange, 

 apical third black, the whole bearing a few short black 

 bristles; tarsi with basal three-fifths of the first joint 



