Morice and Durrant on " Jurinean " Hymenoptera. 433 



Heften, and that at last Panzer practically abandoned the 

 attempt to conduct his work as a regular Serial, and 

 simply published now and again a batch of Plates and 

 descriptions whenever he happened to have one ready. 

 In fact, during the last twenty years of his life (he died 

 in 1829) he seems to have only published two " Heften " 

 = one-sixth of a single " Jahrgang " ! 



Through not realising these facts properly until the 

 greater part of our paper had been written and even set 

 up in type, we fell into several errors in calculating the 

 publication-dates of Figures in the Fauna Ins. Germ. 

 Some of these we were just able to correct in time, i. e. 

 before our paper actually appeared, but others escaped us, 

 and these we hope to correct in the notes here following. 



On page 341 of our paper we were guilty of another 

 mistake in the same connection. We stated there that 

 the coloured wrapper of each Heft bore " the date of its 

 publication, and a list of the insects figured therein." 

 It is true that such a list of insects is printed on each of 

 the coloured sheets which we supposed to be parts of the 

 wrapper. But apparently no dates were printed — at 

 least, we can find none — on any of these sheets, until 

 1829, when Herrich-Schaffer succeeded Panzer as editor. 

 In speaking of these " dates," we were confounding the 

 (monthly?) wrappers of the Heften with the (yearly) title- 

 pages and indices of the " Jahrgang." The following re- 

 statement of the facts is, we believe, correct. Twelve 

 times in each year (or nominal year) of publication, a 

 batch of plates and corresponding descriptions was issued 

 in a coloured wrapper, on which was printed a list of the 

 insects dealt with. When, by the appearance of these 

 12 Heften, the Jahrgang was considered to be completed, 

 the names already given on the wrappers were given 

 afresh, but so rearranged as to form a classified Index to 

 the whole issue of the completed Year ; and this reorgan- 

 ised Index, with an accompanying Title-page (giving the 

 name of the entire work, the publisher's name, the year 

 and place of publication and so forth) was no doubt in- 

 tended to be ultimately bomid up into a Volume along 

 with the Plates and Descriptions indexed in it, these 

 having been already received at intervals in the past 

 year by the subscribers. A similar practice has often 

 been adopted by the Editors of scientific periodicals — 

 subscribers receiving, say, in January 1916 an index to 



