68 DIPTERA OF AUSTRALIA, 



long, biclentate on the inside at the tip. Legs brown, with coxpe 

 and basal portion of femora ochreous ; genua slightly white ; hind 

 tibife (only) with a broad ring of white at the tip ; tip of metatarsus 

 and following four tarsal joints white. Wings perfectly hyaline, 

 with a very faint indication of a spot of light reflection at each 

 end of stigma ; veins and stigma brown, distinct ; anal angle very 

 slight ; seventh longitudinal vein short, close to the margin ; great 

 cross- vein its length distant from inner end of fourth posterior cell. 



Hah. — Almost everywhere in N.S.W. (Masters and Skuse). 

 September to January. About forty specimens before me. 



Ohs. — The hind tibiae only are tipped with white, which at once 

 distinguishes this species. 



Genus 2. Tanypremna, O.-Sacken. 



Tanypremna, O.-Sack., Biol. Cent. Amer. Dipt. p. 19, pi. 2, 

 fig. 2, 1886; Studies I. p. 163. 



" Very closely allied to Brachypremna ; the differences are : 

 the prothorax has no neck-like prolongation, the head is closely 

 applied to it ; the seventh vein does not run into the anal angle 

 close alongside the margin of the wing, but has the ordinary 

 oblique position ; the preefiirca is shorter, moi-e straight in its 

 course, more oblique in its position ; the remaining section of the 

 second vein less sinuate; the abdomen is comparatively longer ; 

 the metanotum less horizontal, more sloping " (Osten-Sacken). 



Rostrum short, pubescent ; nasus very distinct, with a few hairs 

 at the tip. Front narrow ; eyes prominent. Palpi long ; second 

 and thii'd joints about equal in length, the former broader towards 

 the apex ; first joint shorter ; fourth joint very long, longer than 

 the preceding three taken together. Antennae short, beset with 

 very short hairs C? always), 12-joiuted ;*' first joint of the scapus 



* Baron Osten-Sacken counted eleven joints in T. oinlio, O.-Sack., but 

 in r. manicafa, O.-Sack., there are more (possibly only twelve). 



