24 



GENERAL OBSERVATIONS ON THE GEN:US ELACHISTA. 



gave figures of any of this genus ; 

 several are not sufficiently precise 

 to enable us to identify them, but 

 Quadrella, /llbifioutella, Nigrella, 

 Cerusella and Cygnipennelli retain, 

 to this day, the names which he 

 gave them. 



Haworth, in 1 829, appears to have 

 been acquainted with eleven species 

 of this genus, of which Ciucreopunc- 

 tella, Rufucinerea and Trintojiiea are 

 so well described by him, that their 

 names are still retained. 



Treitschke, in 1833, appears to 

 have been acquainted only with four 

 species, one of which, however, was 

 the very distinct Bifascielia first de- 

 scribed by him.' 



Stephens appears to have known 

 more species than Haworth, but he 

 adds little to our knowledge of them, 

 and the new species described by 

 him are rarely recognizable. 



Zeller, in 1839, introduces in the 

 "Isis" thirteen species of the genus, 

 of which three — Luticomella, Nubi- 

 Idla and Anscnndla — were then de- 

 scribed with certainty, for the first 

 time. 



Duponchel, in the eleventh volume 

 of his work, published in 1838, only 

 treats of three of the most conspi- 

 cuous species of the genus — Pollina- 

 rulla, Bifascielia and Ci/gnipennclla. 



ait figure des espcces de ce genre, et 

 quoique plusieurs de ses figures ne 

 soient pas assez precises pour que 

 nous puissions les rapporter avec 

 certitude a nos types specifiques, 

 cinq especes {Quadrdla, Alblfrontella, 

 Nigrella, Cerusella et Cygmpennella) 

 conservent neanmoins encore les 

 noms qu'il leur a donnes. 



Haworth en 1829 parait avoir 

 connu onze especes de ce genre ; et 

 trois d'entre elles (Cinereopujicfclla, 

 Rufucinerea et Triotomca) sont si bien 

 decrites, que leurs noms sont encore 

 maintenus. 



Treitschke en 1833 parait n'avoir 

 connu que quatre especes, dont une 

 est la Bfasciella, espece tres-distincte, 

 qu'il a decrite le premier. 



Stephens parait avoir connu plus 

 d'especes que Haworth, mais il 

 n'ajoute que peu a nos connaissances 

 relativement au genre Elachista, et 

 ses especes nouvelles sont rarement 

 reconnaissables. 



Zeller en 1839 introduit dans I'lsis 

 treize especes de ce genre, dont 

 trois, Luticomella, NohiUila et Anse- 

 rinella, furent alors exactement ca- 

 racterisees pour la premiere fois. 



Diiponchel dans le onzieme vo- 

 lume de son ouvrnge, public en 1 838, 

 ne pavle que de trois des especes les 

 plus saillantes du genre, la Pullina- 

 riella, la Bifascielia et la Cj/gnipen- 

 vclla. 



