10 SVEN LOVEN, ON TllE ECIUNOIDEA DESCllIBEi» HY LINN.«l'S. 



impriinis usui dieatas, ut vel aliqiialis liorum milii superesset 

 idea.» Of tliese scliedules verv neaiiy all containing thc In- 

 sects, from the Coleoptera to the Aptera inclusively, were pre- 

 sented to the Swedish Academy of Sciences by BÄCK, who 

 no doubt liad them from the author himself and attested their 

 authenticity in an inscription on the cover. Tliey have af- 

 forded cxcellent materials for an important Memoir bv Pro- 

 fessor CiiRiSTOPHER AuRiviLLius on the Lepidoptera of the Mu- 

 seum Ludovicne Ulricaj ^). Altogether there are 379 separate 

 leaflets -), small octavo, 165 mm. by 102 mm., nearly all through 

 one for each species, and theu, almost without exception, 

 written on one side only. A ery rarely a leaflet contains two 

 or even three species. The}^ are all in the well-known small 

 and not verv legible hand of Linn-EUS^). The plan is given 

 from the tirst. Every schedule bears, at the top, on the left 

 a capital letter. A, B, etc. indicating the order of arrangement 

 originally intended, and farther to the right a number, and 

 often a small letter, to all appearance referring to the place 

 of tlie specimen in the drawer. Under these marks comes the 

 »differential, thc diagnosis, and under that a space is left open 

 to receivc the references to preceding authors and the figures 

 giveu b v them. Then comes the »descriptio», drawn up under 

 the well-known heads, for the most part verv regularly observed, 

 as thev are scen in the iirinted M. L. U. On evcrv sinole sche- 

 dule the original differeutia» and the »descriptio» are, almost 

 without exception, in one and the same stile of handwriting, 

 as if written with the same pen and ink, one immediately after 

 the other. The references, on thc contrary, inserted into the 

 open space between both bear evident marks of having been 

 added, in great part at Icast if not wholly, subsequently and 

 at various times. and from the handwritino; often beino; verv 

 similar all through a series of species, it will seem as if each 

 author had been oone through once for all. Among the Co- 

 leoptera Petiver is perhaps the earliest (juotation, followed by 

 jMeria>{\s Surinam, Olearius, Rösel, Sloane, JMargraf, while 

 Seba and Greav are amono- the latest. In some instances a 



') Recensio critica Lepidopterorura Musei Ludovica^ Ulricjc quaj de- 

 scripsit Cauolus a Linnk. K. Svenska Vetenskaps- Akademiens Hand- 

 lingar, XIX, N:o 5. Stockholm 1882. 



*) Coleoptera 72 leaves, Hemiptera 6(5, Lepidoptera 188, Neuroptera 

 1. Hvmenoptera 18, .\ptera 134. 

 '3) See Plate 1. 



