1887.] 99 



Fourcroy, who, in his " Entomologia Parisiensis," gave names to 



Geoffrey's insects, says of this species (Z. e.) — 



" 'No. ] 1. C. quercus, Le Kermes rond efc brun du ch^ne. C. qiiercus rotundus 

 fitscns." 



The name given, taken as that o£ Liune, is incorrect, for Linne 

 himself, in the " Systema Natura?," p. 740, No. 5, refers his Coccus 

 quercus to "Reaumur Ins., iv, t. 6, f. 1 — ^4," adding "Habitat in 

 Quercu rohore ;" but neither then, nor in the " Fauna Suecica," giving 

 any description. Eeaumur (I. c.) says of it, i. e., of figs. 1 — 4, that 

 it is " une Gallinsecte en forme de rein ;" this in no way applies to 

 the fig. 2 of pi. V, representing our L. fuscum, which, as he says, is 

 " presque spherique." This figure No. 2 is not referred to by Linne 

 for any of his species of Coccus. 



The TXdime fuscus was first applied to this species by Gmelin in the 

 13th edition of Linne's " Systema Naturae," where (Z. c.) he has — 



" Coccus fuscus. C. quercus fuscu.t, Modeer, Act. Goth., i, 24, 18. Greoffr. ins. 

 par. i, 507, 11. Eeaum. ins., iv, t. 5, f. 2. 



Habitat in quercu robore, albo tomento obductus." 



The last three words are an addition of his own, and refer, I pre- 

 sume, to the cottony matter enveloping the eggs and covered by the 

 scale ; they are not in the original of Geoffroy or E-eaumur which are 

 cited. The reference to Modeer is not correct, either as to the name 

 or its applicabilit}^ to the species of Geoffroy and Reaumur indicated. 

 Modeer {I. c.) has — 



" Ek-Fastfltet (Quercus roboris). Female scale reniform, or as if with both 

 ends curved together, dark brown, bedecked with a white powder, . . Geoffroy 

 calls this ' Fastfly ' Ckermes quercus reniformis." 



This is equivalent to Coccus quercus, Linn., as before stated, and 

 is not the C. fuscus here denoted. 



In his " Essai sur les Gochiuelles," p. 250, Signoret describes a 

 Lecanium fuscus which he attributes to Geoffroy (meaning, no doubt, 

 his " No. 11, Chermes quercHs rotundus fuscus,'' cited above), yet at the 

 same time he disallows that the figure in Reaumur's pi. v, fig. 2, cited 

 by Geoffroy to illustrate his species, represents it. Thus he says — 



" Dans notre Catalogue nous avons indique I'espece de Reaumur, pi. v, fig. 2, 

 comme 6tant \e fuscus, Geoffroy, puisqu'il y renvoyait ; mais la figure de Eeaumur 

 se rapporte a un autre type qui pourrait bien etre le L. Einerici, Planchon, car il 

 dit ' Elles sont tres semblables, par leur figure et leur grosseur, au Kermes, et l?ur 

 couleur est peu differente de celle du Kermes pale.' Un peu plus loin il ajoute : — - 

 ' qui y tiennent (aux chenes) par une base circulaire qui a peu de diametre,' tandis 

 que, dans ftiscus, c'est une sphere coupee en deux et par consequent tenant a I'arbre 

 par une large surface circulaire, ce qui se rapporte a Geoffroy disant qu'elle ressemble 

 a colle de I'ornie." 



