24 



GENERAL OBSERVATIONS ON THE GENUS DEPRESSARIA. 



place parmi les Depressaria. 



De Geer in the first volume of his 

 •« Memoires," published in 1752, 

 gives at p. 421^, tlie history of a 

 *' small larva with sixteen legs, green, 

 with three dark green stripes along 

 the back, and with black dots, which 

 rolls the leaves of the wild chervil;" 

 this is no other than Depressaria Ap- 

 plana : in the second volume of his 

 «' iMemoires," De Geer designates this 

 species (p. 406) by the title of 

 *' Phalene a ailes croisees du cer- 

 feuil," and at p. 407 of the same 

 volume he gives us the history of the 

 ♦* Phalene a ailes croisees de la Berce," 

 which he names Phulcena Tortrix 

 Heradiana of Linnaeus. De Geer's 

 second volume was not published 

 till 1771, and in the nineteen years in- 

 tervening between the appearance 

 of his first and second volumes, 

 Linnaeus had invented and perfected 

 his binomial nomenclature, and had 

 published the second edition of the 

 *' Fauna Suecica," and the tenth and 

 twelfth editions of the " Systeraa 

 Naturae;" the writings of Linnaeus, 

 therefore, next engage our attention. 

 In the "Fauna Suecica" we find, 

 No. 1334, a Phalcena Tortrix Heradi- 

 ana, but this can not be referred to 

 any particular species : the diagnosis is 

 very vague; the reference to De Geer 

 is to his first volume, in which only 

 onr A pplan a is alluded to; the habitat 

 assigned to the species clearly im- 

 plies our Heradiana, but that Linnaeus 

 was himself aware that he was de- 

 scribing a genus rather than a species 

 is shown by the words — "of this we 

 have many species, which differ in 

 size, but are not easily distinguished 



De Geer dans le premier volume 

 de ses "Memoires," public en 1752, 

 donne a la page 424 I'histoire d'une 

 «* petite chenille a seize pattes, verte, 

 avec trois raies d'un vert fonce le 

 long du dos, et a points noirs, qui 

 detourne les feuilles du cerfeuil 

 sauvage ;" celle-ci est la Depressaria 

 Applaiia: dans le second volume de 

 ses " Memoires/' De Geer designe 

 cette espece (p. 406) par le titre de 

 " Phalene a ailes croisees du cerfeuil," 

 et a page 407 du meme volume il 

 nous donne I'histoire de la " Phalene 

 a ailes croisees de la Berce," qu'il 

 nomme Phalcena Tortrix Heradiana 

 de Linne. Le second volume de 

 De Geer ne fut public qu'en 1771, et 

 pendant les dix-neuf annees qui sont 

 ecoulees entre la publication du pre- 

 mier et celle du second volume 

 Linne avait invente et perfectionne 

 sa nomenclature binominelle, et avait 

 public la seconde edition de la 

 " Fauna Suecica" et les dixieme et 

 douzieme de son " Systema Na- 

 turae ;" ces ouvrages de Linne rae- 

 ritent maintenant notre attention. 



Dans la •' Fauna Suecica" nous 

 trouvons au No. 1334 une Phalctna 

 Tortrix Heradiana, mais on ne saura 

 la rapporter a aucune espece dis- 

 tincte ; car la diagnose est trop 

 vague et la citation du premier vo- 

 lume de De Geer indiquerait notre 

 Applana ; Vhabitat, au contraire, se 

 rapporte assurement a notre Hera- 

 diana, mais il semble que Linne a 

 plutot eu en vue un genre ou groupe 

 qu'une espece particuliere, car il dit 

 — "Nous avons plusieurs especes de 

 celle-ci, qui different quant a la 



