534 A RKVISION OF THE CHIROMTZIXI (DIPTERA), 



Both sexes with wings, other characters variable 2. 



2. The male with contiguous or separated eyes: the antennae with the basal joints 

 about equal in length, the third joint about twice the length of the second. 



Clii>-0)ity~a Wiedfiuann . 

 The male with contiguous eyes; the antennae with the basal joints variable in 

 proportion, the third joint four times the length of the second. 



Metoponia Macquart. 



Genus M E T O P X I A Macquart . 



Metoponia, Macquart, Dipt. Exot., suppl. 2, 1847, p. 28; Walker, List Dipt. 



Brit. Mus., v., suppl. 1, 1854, p. 112; Osten-Sacken, Berl. Ent. Zeit.. 



xxvii., 1883, p. 297; White, Proe. Roy. Soc. Tas., 1914, p. 46; and 



191G, p. 2G0; Hardy, Proe. Roy. Soc. Tas., 1920, p. 34. 

 Inopus, Walker, Ins . Saund . Dipt., 1850, p . 2 ; List Dipt . Brit . Mus., v., suppl . 



1, 1854, p. 112; Osten-Sacken. Berl. Ent. Zeit., xxvii., 1883, p. 296. 

 Cryptoberis, White, Proe. Linn. Soc. N. S. Wales, xli., 1916, p. 73. 



Definition. — The eyes are contiguous in the male and widely separated in the 

 female. The auteunae do not exceed the length uf the head: the tirst joint may be 

 s the length of the third or considerably less, the second joint is short; the third 

 joint is rather long, at least four times the length of the second. The abdomen 

 is depressed in both sexes, and normal in shape. The venation is variable; the 

 radial vein may issue from the first basal cell, or it may branch off the cubital 

 vein at a little distance from the basal cell; the upper branch of the cubital vein 

 is usually present, but may be absent in isolated specimens; the diseal e«ll has 

 three posterior veins issuing from it, all of which reach the wing border. The 

 first and second posterior veins may issue separately from the diseal cell or from 

 a point, or they may be stalked; these characters are variable within a species. 

 The third posterior vein is never present; the fourth is normal; the fifth issues 

 from the second basal cell and joins the anal cell considerably before it reaches the 

 wing margin. 



Metoponia rubriceps Macq\uirt. (Plate xxix.. figs. 5. B. ) 



Metoponia rubriceps, Macquart, Dipt. Exot., suppl. 2, 1847, p. 28. I'l. i., fig. 



4; and .suppl. 3, 1848, p. 15; Walker, List Dipt. Brit. Mus., v., supj)!. 



1, 1854, p. 113; Osten-Sacken, Berl. Ent. Zeit., xxvii., 1883, p. 297; 



White, Proe. Roy. Soc. Tas., 1914, p. 46; and Proe. Linn. Soc. N.S. Wales, 



xli., 1916, 1). 75; Hardy. Proe. Roy. Soc. Tas.. 1920, p. 34. text-fig. 1: 



Smith. Proe. Linn. Soc. N.S. Wales, xlv., 1920, p. 505, PI. xxvii.-xxviii. 

 Chiromijza flavicaput, Walker, Ins. Saund. Dipt., 1852, p. 163. 

 Cryptoberis herbescens, White, Proe. Linn. Soc. N.S. Wales, xli., 1916, p. 97. 



text-fig . 1 . 

 f Inopus despectns, Walker, Ins. Saund. Dipt., 1850, p. 2, PI. i., fig. 7; List 



Dipt. Brit. Mus., v., suppl. 1, 1854, p. 112 (dispectus) . 

 Si/>ionymy. — The reasons for considering that Cryptoberis herbescens White 

 is identical with Metopotiia rubriceps Macquart have been dealt with in my paper 

 in the Proceedings of the Royal Society of Tasmania, 1920, and no further com- 

 ment is needed here. The illustration of Inopus despectus Walker shows that 

 the upiier branch of the cubital veiti is mis«;ing, which character is rare in Meto- 

 ponia rubriceps, but the other characters agree so well with this common species 

 that tile generic position is beyond dispute; the basal joint of the antennae, which 



