82 



REVISION OP THE STRATIOMYIDiE OF AUSTRALIA, 



Subfamily CLITELLARIN^. 



The wings in this subfamily possess four, posterior veins, which 

 all arise from the discal cell, although the fourth may issue only 

 from its extreme corner; the scutellum, in all known Australian 

 species, possesses two spines. 



Four, very distinct genera are known to occur in Australia, 

 three of which are now described for the first time. Of the 

 latter, Ophiodesma is fairly typical of the subfamily; Elissoma 

 seems to show affinities with the 6tratiomyin(K, and Geranopus 

 with the Saryince. On the other hand, the two last-named 

 genera, both by their venation and the form of the legs, seem 

 to be related to one another. 



TahU of the Australian Genera of CliteUarhw. 

 1. Thorax with a stout spine on each side; antennas with a long, 



densely fringed style ' Negritomyia Bij^ot. 



Sides of thorax without spines; antenntt without a fringed style 2. 



2. Antennas with an arista. First joint of posterior tarsi longer 



than posterior tibiae Geranopus, g.n. 



Antennas without arista 3. 



3. Antennas very long and slender, about five times the length of 



head Elissoma, g.n. 



Antennas not slender, about twice the length of head. Ophiodesma, g.n. 



10. N E G K I T o M Y I A Bigot. (Fig.4). 



Thorax with a stout spine on each side; anteniije terminated 

 by a very long, densely-fringed style. 



Face barely projecting, but 

 descending well below the 

 eyes. Eyes hairy in Ijoth 

 sexes, joined in the male, ^^ g ^^^^^ , ->. .- 



widely separated in female. i^,- 



Antenna? situated a little be- 

 low the middle of head in pro- 

 file, about twice the length of .^'^■*: „. . , 



, ,. . . . ^ ^ • ,1 Head of Neqritomyia albitarsu, 6 . 



the head: farst joint twice the 



length of second, which is closely approximated to the third: 

 third consisting of a bare, cylindrical, basal portion, and a very 

 long, densely fringed style, which is slightly longer than the 



