Illl. Ml'TERA-BRACHYCEKA OK TASMANIA, 



few in number and arc easily distinguished. These genera, 

 however, contain an immense number of species, and their 

 identification is a matter of considerable difficulty. For- 

 tunately in working out the Tasmanian species, I have 

 had the assistance of Miss G. Ricardo, the chief authority 

 on this family, who has most kindly examined my speci- 

 mens, and I have also personally examined Walker's 

 types in the British Museum, so the identifications given 

 in the following pages may be taken as trustworthy. 

 Of the 23 species described, 11 occur also on the main- 

 land of Australia, whilst the remaining 12 species appear 

 to be confined to Tasmania. 



Fig. 12. Antennae of (a) Tabanus, (b) Pangonia t 



(c) Chrysops. 



Table of the Tasmanian Genera of Tabanidas. 



1. Hind tibiae without spurs (Tabanina). 



Hind tibiae with spurs (Pangonina). 3 



2. Third antenna! joint dorsally humped near its base, 



with four subsequent annulations. 



Tabanus, I». 



3. Third antenna! joint composed of five segments, the 



firs! being much the longest; wings with con- 

 spicuous black markings. 



Chrysops, Meig. 

 Third antennal joint composed of eight segments, 

 the first being only slightly the longest. 4 



4. Proboscis long, with vt i v small sucker-flaps. 



(P a N g o n I a, sensu lato). 5 

 5 Wings with first posterior cell open ; eyes bare. 



CoRIZONEURA, PvOIld. 



Wings with first posterior cell open; eyes hairy. 



DlATOMIN K I - B a, Rond. 

 Proboscis with sucker-flaps in the form of a hatchet. 6 

 6. Anal vein curved, anal cell open, antennae subu- 

 late. 1. P e l e c o r ii y n c ii u s, Macq. 



