22 THE DIPTERA-BRACHYCERA OF TASMANIA, 



DlATOMINEURA VIOLACEA, Macq. 



This species is described by Macquart as having the 

 antennae red ; abdomen a brilliant violet with green reflec- 

 tions; wings a little brownish. 



Length. Female, 7 mm. 



20. Pelecorhynchus, Macq. 



This genus is distinguished by the hatchet-shaped pro- 

 boscis, subulated antennae, curved anal vein of wing, and 

 open anal cell. The species are of large size, and several 

 have boldly spotted wings. 



For our knowledge of this genus we are mainly indebted 

 to Miss G. Ricardo's "Revision of the Genus Pelecorhynchus 

 of the Family Tahanidce" (Ann. Mag. Nat. Hist.. May, 

 1910), in which all the species are described. Eight spe- 

 cies are known, six of these being from Australia and two 

 from Chili ; of the Australian species two occur in Tas- 

 mania ; both of these are of considerable rarity. 



Tahle of the Tasmanian Species of Pelecorhynchus. 



1. Wings spotted. 2 



2. Abdomen with interrupted whitish bands ; thorax 



with two white spots on black stripes. 



Eristaloides, Walk. 



Abdomen with entire whitish bands; thorax un- 

 spotted. Nigripennis, Ricardo. 



Pelecorhynchus eristaloides. Walk. 



Thorax greyish-brown, with two elongated white spots, 

 each situated on a black stripe, hairs at sides black ; 

 abdomen with white bands on the second, third, and 

 fourth segments, which are interrupted in the middle ; 

 wings boldly spotted. 



Length, 15-20 mm. 



Hab. Tasmania and Australian mainland. 



Pelecorhynchus nigripennis, Ricardo. 



Thorax blackish-brown, with red hairs at sides, and 

 altogether unspotted; abdomen blackish-brown, the sec- 

 ond, third, and fourth segments with white bands, which 

 are entire; wings boldly spotted. 



Length, 18 mm. 



Hab. Tasmania, Victoria, and New South Wales. 



