g2 AISTKAI.I AN DIXIU.K. 



Antennae short, about the length of the thorax, the basal 

 flagelluni joints very distinct from each other; palpi as in 

 preceding species. 



Venation: Orijrin of Rs after tip of Sc; first part of stem 

 of Rs double the length of the second part, thei'efore r-m 

 well before fRs; stem of K., . :; somewhat shorter than R., 

 Hypopygium built on the same plan as in D, fiavicollis, but 

 the parts differ as follows: — The lamellse, visible from above 

 between the base of the side pieces, are produced in a small 

 blunt dif^itation; the internal distal processes of the side 

 pieces are rather long, about half the lenjrth of the claspers, 

 and much widened at their extremity, which carries a row 

 of small setje; the claspers are about as lonj;' as the side 

 pieces and nearly straifjht, their tip, which is suddenly 

 pointed, is somewhat turned down; no conspicuous process 

 or hooks on the sedceagus or the tergum of the hypopygium; 

 as a whole, all the parts are relatively more developed and 

 robust than in flavicollis. 



Length of wing: 3 2-3 mm. 



Female: Similar to the male, the legs very slightly 

 darker, especially the front ones. 



Type and allotype from Burnie (Tasmania), 2Gth. 27th 

 October, 1922. In the collection of the Cawthron Institute. 

 Four paratypes, i.ne male and three females from the same 

 locality, and one female from St. Patrick's River, 21st 

 October. l'J22. 



This last-mentioned specimen from St. Patrick's River 

 has the dark marking of the mesonotum much obliterated; 

 it corresponds very well in every other point. One female 

 from Sassafras, captured at the same spot as I), fiaricollifi, 

 agrees very well with the characters of fjciiiciildtit, with the 

 size, the wing venation and marking, and the yellow scape, 

 but differs from it in the c()mpletely orange mesonotum and 

 haltercs as well as by the darker legs. I was, therefore, at 

 first disposed to consider the Tasmanian form as a variety 

 of the Victorian one, but closer examination showed that the 

 points <if difference are well marked and justilied considering 

 them as different species. 



This difference in characters may be summe«l up as 

 follows: — 



Size I'lrger in (jcnimi-tid. 



Scape distinctly orange and not brown. 



Mesonotal dark bands well marked, ;ind in mesr,*iotum 

 nearly completely orange. 



Knob of haltcres distinctly black and relatively short. 



