1880.] 79 



Lecanium ulmi, Linn, 

 hi the " Fauna Suecica," p. 2Gr), No. 1019, Linne first noted his 

 Coccus ulmi camp estr is : " Habitat in ulmo campestri ;" in the " Sys- 

 tema Naturae," p. 740, No. 9, he repeats this without any description, 

 refers to the F. S. No. 1019, and to Geoffr. Paris, 512, No. 7 ; this, 

 however, should be 507, No. 8,* which is Geoffrey's Chermes ulmi ro- 

 tundus, thus described : — 



" II est rond, spherique, brun, de la grosseur et de la couleur des bayes de 

 genievre. II s'attache aux petites branches de rornie, qui quelquefois en sont si 

 cliargees, qu'ellee ressembleut a des grappes." 



I find such brown $ scales in May on elm bushes in several places 

 in Lewisham, also (^ scales a week or two earlier from which I obtain 

 the imago. 



Walker omits Lecanium ulmi from his " List of British Hemiptera 

 (Coccidce),'' 1860, although Stephens had long previously included it 

 in his " Systematic Catalogue of British Insects," ii, 368, 9903 (1829), 

 as Coccus ulmi, Linn., giving a reference to De Geer, v (should be vi), 

 pi. 28, fig. 7. 



De Geer in his " Memoires, vi, 436, thus writes : — 

 " Gallinsecte ovale blanche, a bandes transversales brunes, de I'orme. 



Coccus (ovatus ulmi) ovatus alius fiisco transverse striatus, idmi. 



Coccus ulmi campestris, Linn., Faun., Ed. 2, No. 1U19. Syst., Ed. 12, p. 740, 

 No. 9. 



Chermes ulmi rotundus, Geoffr., Ins., Tom. i, p. 507, No. 8. Le Kermes de 

 I'orme (pi. 28, fig. 7). 



" Ces Grallinsectes sont de figure ovale, un peu pointue k I'uu des bouts, que je 

 crois etre le derriere ; elles sont tres-convexes en dessus, mais plates ou un peu 

 concaves du cote qui est applique sur la branche ; leur surface est polie, lisse et un 

 peu luisante. Elles sont blanches et ornees de bandes transversales brunes, de sorte 

 qu'elles ne ressemblent pas mal au ventre de quelques especes d'Araignees ; mais 

 quelquefois on en trouve de toutes brunes." 



Now, it is in this country that the wholly brown scales, mentioned 

 as exceptional by De Geer, are the only ones found, and the banded 

 sort appear to be scarce elsewhere also, for Signoret says respecting 

 them (Ess. Cochin., p. 263), "Under the name oi fasciaticm Costa 

 indicates a species figured by De Geer, pi. 28, figs. 7 — 10, which has 



* I follow signoret and others in this. The want of a description by Linne makes his Coccui 

 ulmi obscure, and the doubt as to his meaning is not lessened by his reference to " Geoffr. paris, 

 512, No 7," for there is no such No. 7. It is true that Geoffroy, at p. 51:2, No. 3, has a " Coccux 

 ulmi, coi-pore fusco, serico albo," and a reference to "Reaumur, Ins., iv, t. 7, f. 1, 2, 6, 9, Le 

 cochinelle de I'Orme," yet this is not cited by any author but Schrauk iFaun. Boic, 145, 1204) as 

 the species intended by Linn^. Schrank's Coccus ulmi is really the above Coccus [Gossyparia) 

 ulmi, Geoffr., as is .shown by his description and reference to Reaumur iv, t. 7, f. 1 — 10 ; and it is 

 worthy of note that Ruaiimur is not cited by Linne for his C. ulmi. Fabricius (E. S , iv, 225) cites 

 for Coccus ulmi, Linn., "Geoffr., 5(i7, 8 ; Ue Geer, vi, 4U0, pi. 28. 7," which refer to a U'canium ; but by 

 his description " Cljijeus rufescens margine villoso, albido," he apparently intends Coccus utow, 

 Geoffr. I believe, therefore, that LijiuiJ's Cuccas idmi is I'ightly a Lecaniuni. 



