By E. W. FEEGUSON AND G. F. HILL. 247 



M. Sureouf has also separated Diclisa from Scione, one Australian species 

 {Scione singularis Maeq.) being placed in Diclisa. Into the question of the 

 validity of the two genera we do not propose to enter, but it must be emphasised 

 that as Scione and Diclisa were founded on the same genotype — S. incompletat — 

 the name Diclisa becomes an absolute synonym of Scione and cannot be separately 

 used for a distinct genus. 



It is rather unfortunate that several papers dealing with Australian Tabani- 

 dae have not been noticed by Sureouf. Many of these are probably of too re- 

 cent date for inclusion, but species described in papers by Taylor and also by 

 Hardy should not have been overlooked. 



While our present communication deals in great measure with questions of 

 synonymy and nomenclature, a number of new species are also described. These 

 include one species of Silvius and 7 species of Tabanus. 



Apocampta subcana Walker. 



Chrysops siihcanus, Walker, List Dipt. Brit. Mus., 1., 1848, p. 204. — 

 Apocampta subcana, Ricardo, Ann. Mag. Nat. Hist., (7), viii., 1901, p. 287. — 

 Apocampta nigra, Schiner, Nov. Reise, Dipt., 1868, p. 96; Ricardo, op. cit., (7), 

 v., 1900, p. 99. — Diachlorus melas, Bigot, Mem. Soc. zool. France, v., 1892, p. 625; 

 Ricardo, op. cit., (7), siv., 1904, p. 357. — Diatomineura 1 gagantina. Bigot, Mem. 

 Soc. zool. Trance, v., 1892, p. 620; Ricardo, op. cit., (8), xv., 1915. — Diatomineura 

 minima, Ricardo, op. cit., (7), v., 1900, p. 119, tab. 1, fig. 4-5. — 1 Pangonia 

 anthracina, Maeq., Dipt. Exot., Suppl. iv., 1850, p. 23, Tab. 2, fig. 3. — Corizoneura 

 anthracina, Ricardo, op. cit., (7), v., 1900, p. 113. 



The synonymy Chrysops subcana Walk. = Diacliloris melas Big. = Apo- 

 campta nigra Schin. has already been recorded by Ricardo, as has also that of 

 Diatomineura gagantina Bigot with Diatomineura minima Ric. 



At the request of one of us (E.W.F.) Dr. Guy Marshall very kindly com- 

 pared a specimen sent to him with the types of subcana, gagantina, and minima 

 and informed us that the three species were synonymous. 



It is possible that Corizoneura anthracina Maeq., should also be referred to 

 the same species. The rather meagTe description fits subcana, except that the 

 eyes are described as bare; but as the specimen was abraded when described, 

 this fact may account for the eyes being so described. There are specimens of sub- 

 cana under the name of anthracina Maeq. in the Macleay Museum. 



On several occasions specimens have been received for identification (G.F.H.) 

 which were taken whilst attacking persons bathing along the beaches of Magnetic 

 Island, N.Q. (6.2.21). 



Diatomineura stiB-ApPEXDicuLATA Maeq. 



Pangonia sub-appendiculata, Macquart, Dipt. Exot., Suppl. 4, 1850, p. 19. — 

 D. subappendiculata, Ricardo, Ann. Mag. Nat. Hist., (7), v., 1900, p. 113. — D. 

 inflata, Ricardo, Ann. Mag. Nat. Hist., (8), xvi., 1915, p. 34. 



Macquart's species has not been identified by recent workers on Australian 

 Diptera, but the size and description tally with D. inflata Ric. 



The presence of an appendix to the fork of the third longitudinal vein 

 is, however, variable, and in the majority of our series there is no appendix, but 

 only a slight angulation; in some, however, there is a short but definite spur. 

 The frontal callus is stated to be black, but it is more generally reddish; our 

 series again shows this to be variable. 



