Monograph on Argyresthia. xix 



March I wrote (Zool. 2094) " No part of the description will apply to Brockeella ; " 

 but this matter is very easily explained : it seemed to me then that the ground colour 

 of Brockeella was white, whereas Linneus begins, " Anterior wings brownish or 

 golden ;" and it was not till after the publication of that number of the ' Zoologist,' 

 that — by Mr. H. Doubleday sending me a specimen of Brockeella, and pointing out 

 to me its resemblance with the Linnean description — I perceived the agreement. I 

 now find that Zeller (who is still unaware of its being the Linnean Rajella) says that 

 the ground colour of the anterior wings is white, but that the insect is more readily 

 described if we take the gold colour for the ground colour. Further, I tried the ex- 

 periment myself of describing the insect, taking white for the ground colour, and I 

 soon got involved in such a labyrinth that I was obliged to desist. 



The reference to De Geer and the description of the larva applying to a species of 

 Lithocolletis, I have not thought it advisable to supersede Hubner's name, by which 

 the insect is so generally known. 



Sp. 21. arceuthina, Zeller. 

 Argyresthia arceuthina, Zeller, Isis, 1839, S. 205, 15. Linn. Ent. ii. 288. 



Expansion of the wings 4 lines. Head white. Face whitish. Palpi whitish. 

 Antenna? whitish, with brown annulations; basal joint white. Thorax white, the 

 sides bronze-coloured. Abdomen fuscous. Legs whitish. Tarsi whitish, with the 

 end of the joints brown. Anterior wings very shining, bronze-coloured, concolorous : 

 cilia grayish. Posterior wings pale gray, finely pointed, with yellowish gray cilia. 



The bronze concolorous anterior wings distinguish this from all its congeners, ex- 

 cept the following, but from that it is readily separated by its white head and thorax 

 and more pointed posterior wings. 



This and the two following are juniper feeders, thus resembling abdominalis and 

 dilectella: this species is abundant on junipers at Sanderstead and Riddlesdown, in 

 May : 1 have met with it both in the middle and end of that month. It is very pro- 

 bably double-brooded, but I am not aware at what time the second brood appears. 



Sp. 22. certella, Zeller. 

 Argyresthia certella, Zeller, Linn. Ent. ii. 289. 



Expansion of the wings 4 lines. Head yellowish. Face yellowish. Palpi 

 whitish. Antennae whitish, with darker annulations ; basal joint yellowish. Thorax 

 bronze-coloured. Abdomen fuscous. Legs whitish. Tarsi whitish, with the end of 

 the joints pale fuscous. Anterior wings very shining, bronze-coloured, concolorous : 

 cilia grayish. Posterior wings pale gray, less finely pointed than in the preceding, 

 with yellowish gray cilia. 



Differs from the preceding in its yellow head, bronze thorax, and less pointed 

 posterior wings. 



I have a single specimen, which I took in May, 1847, along with arceuthina, 

 among junipers. 



Zeller states that he took his single male " in July, near Reinerz, on a lofty 

 mountain in a pine wood ; but whether juniper grows there, I no longer recollect." 



