25ß C R. Osten Sachen: 



notwithstanding. I would, by all means, retain the current name, 

 and add the other with a query. 



3. The reference to T. annulata Lin. in de Villers, Car. 

 Linnaei Entomologia III, p. 361 (1789), with the patria: Gallia 

 australis V. (which means Villers), deserves a particular attention, 

 when brought in connection with the specimen noticed by me in the 

 v. Winthem collection in Vienna, labelled Lyon (comp, my article 

 in the Stett. E. Z. 1857, p. 90, and Mik, 1. c. p. 623, where this re- 

 ference, in consequence of a lapsus calami, is incorrectly given). 

 Villers lived in Lyon, and hencc it may be considered as certain 

 that the specimen in v. Winthem's collection was derived from 

 Villers's. The latter died in 1810; v. Winthem although only 

 23 years old, in 1823 possessed already a considerable collection of 

 diptera, which induced Meigen in that year to spend some time at 

 bis house (comp. Dr. Steetz's obituary notice on v. Winthem in the 

 Stett. Ent. Zeit. 1848, p. 194—198). That Meigen did not mention 

 annulata at all in his principal work may prove that v. Winthem 

 acquired the specimen from Lyon later than 1823. At any rate 

 Villers seems to have been the only one who found and identificd 

 annulata after Linne, and for this reason a reference to his work 

 must be added the other references about that species. With this 

 addition, I entirely agree with Mik's synonymy of this species, and 

 also acknowledge the expediency of omitting all the other references 

 from the works of Linne and of Fabricius. The synonymy will 

 stand thus: 



Trochobola annulata Linne. 



Tip. annulata Lin., Fauna Suecica 1752 1); de Villers, Car. 



Linnaei Entom. III, p. 362 (1789). 

 Limnobia imperialis Loew, Linn. Ent. V (1851), p. 403, 

 Tab. II, f. 13-15; O.Sack., Stett. Ent. Zeit. 1854, p. 212, 

 Tab. I, f. 1, 2. 

 Limnobia annulata Lin., U.Sack., Stett. Ent. Zeit. 1857, 



p. 90; Sckiner, Fauna II, p. 572. 

 Discobola annulata Lin., 0. Sack., Proc. Ent. Soc. Phil. 1865, 



p. 226. 

 Trochobola annulata Lin., O.Sack., Mon. N.-Ani. Dipt. IV, 

 p. 97 (1869). 

 It was upon the advice of Loew that I adopted Trochobola 

 instead of Discobola, as there is a group of fishes called Discoboli 



Iquote after Villers; Mik quotes the second edition. 



