46 THE DIPTBRA-BRACHYCKRiL OF TASMANIA, 



reachiug the margin just above the wiug tip; discal cell and 

 discal cross- vein as in Leptis ; fourth posterior and anal cells 

 completely closed. 



This genus can be distinguished from nearly all other 

 genera of Leptidce by the closed fourth posterior cell. This 

 character alone is sufficient to separate it from the other 

 Tasmanian genera ; it is also the only known Tasmanian 

 genus in which the antennae are terminated by a short style. 



Only one species is know^n. 



Clesthentia aberrans, Sp. nov. (Fig. 3.) 



Head, thorax, and abdomen black and shining ; legs yellow, 

 with femora blackish ; wings brownisb, with a distinct 

 stigma. 



Lengtb. Male, 4.5 mm.; Female, 5 mm. 



Hab. Man galore. 



Male. Face descending, but little below the antennae. 

 Eyes bare, separated. Antennae black. Front black, shining, 

 of equal breadth throughout; back of head with a little 

 short pubescence. Thorax andscutellum black, shining, with 

 a little short pubescence on dorsum, and a few yellow hairs 

 on sides. Abdomen black, shining, almost bare, but with a 

 little pubescence on sides, white on the first and second, and 

 black on the remaining segments. Legs yellow; femora 

 more or less suif used with black, and tarsi darkened, but 

 colouring of the legs subject to some variation ; tibiae with a 

 few small whitish bristles. Wings brownish, with stigma 

 dark brown ; the fourth posterior and anal cells closed 

 slightly above the wing margin. 



Female resembles the male in all respects. 



This species occurs commonly on the windows of my house 

 at Mm n galore, between S^ptemlier 20 and December 15. I 

 have not met with it elsewhere. 



5. M E T o p o N I A, Macq. 



This genus was created by Macquart for a Tasmanian 

 species that is unknown to me. It was placed by him in the 

 Xylophagidce (now included in the Leptidce). It is described 

 as resembling Beris ; palpi short ; front of female very large ; 

 antenna) inserted towards tiie base of head ; first segment a 

 little elongated, third the length of first, with eigiit annula- 

 tions ; eyes small ; ocelli at vertex ; scutellum unarmed. 

 Metoponia rubriceps, Macq. 



The species is described as having the head red, the thorax 

 dull black, abdomen shining black, and the legs black. 



Length (Female) 3 lines. 



