148 C. JR. Osten Sacken: 



fand, so Hess ich Loew's Fauna von Südafrica unbesehen. Herr 

 V. Röder liat mich sofort etc auf meine Unterlassung auf- 

 merksam gemacht etc." 



Translation. In my above-mentioned paper („Monograph" 

 etc. 1897) I have, unfortunately, committed a great mistako; I have 

 paid no attention to H. Loew's publications on the same subject. As 

 the majority of these animals belong to the Asiatic and Australian 

 Regions, and as nothing could be found about African 

 species in the Catalogues or Records, I have not consulted 

 Loew's Fauna of South-Africa. Herr v. Röder has immediately called 

 my attention to this Omission etc." 



Dr. W. would have found all the necessary references in the 

 German yearly Entom. Berichte between the years 1858 — 1880, 

 under the heading Nemestrinidae, if he had taken the trouble to 

 look for them. 



The other new genus of Nemestrinidae, Parasi/mmictus, 

 is described by Bigot in the same place as Dicrotrifpana (Ann. 

 S. E, Fr. 1879). It was founded ior Hirmoneura clausa O.S. West. 

 Dipt. 1877, p. 225, but is does not appear from Bigot's letterpress 

 that he ever saw a specimen of it. In my Catal. N.-Am. Dipt. 1878, 

 p. 237, Note 142, I have a statement about another species of Hir- 

 moneura of which I had seen specimens brought from Colorado by 

 Morrison, and which have the second posterior cell open. As my 

 H, clausa has this cell closed, I strongly suspect that Bigot took 

 advantage of my statement of this difference for erecting a new genus, 

 without ever having seen a specimen of it. There is a passage 

 in Ann. S. E. Fr. 1881, p. 14 at bottom, where he mentions Dicro- 

 trypana as represented in his collection, and there is no similar mention 

 about Parasyinmictus. And indeed, the type of the latter is not in 

 the collection. Williston passed judgnient upon Pnrasymmictus 

 (Can. Ent. 1883, p. 71) in simply placing it as a synonym under 

 H. clausa O.S. 



Bigot's monographic essay on Nemestrinidae (among his 

 Dipteres Nouveaux ou peu connus, Ann. etc. 1881, p. 13 — 21) 

 contains some Statements about the two genera discussed in this paper, 

 but nothing of any importance. 



After fourteen years of forbearance, I have a right, I think, 

 in the matter of Parasymmictus, to publish my opinion of the 

 treatment given to this genus by Dr. Brauer. In his pamphlet: 

 Offenes Schreiben als Antwort auf Herrn Baron Osten- 



