Monograph on Argyresthia. vii 



allied species except the preceding, but it differs from that in being little more than 

 half the size. 



I have repeatedly taken this species out of hedges (sometimes I have beaten it from 

 oaks, and one or two from sallows), from the middle of June to the middle of August : 

 the variety b. has always occurred along with the typical specimens ; generally if I 

 took four specimens one of them would have a yellow head. I was at first inclined to 

 think the variety a distinct species, but am now fully satisfied that it is merely a va- 

 riety. 



A specimen of this insect and one of semifusca are in the Linnean cabinet labelled 

 pruniella. Zeller makes no mention whatever of the variety 6, with the head, thorax 

 and iuner margin of the anterior wings luteous ; hence I suppose this variety has not 

 occurred on the Continent: there can be no possible doubt, I think, that this is really 

 his species. 



Sp. 6. conjugella, Zeller (fig. 5). 



Argyresthia conjugella, Zeller, Isis, 1839, S. 204, 4. Linn. Ent ii. 258, pi. 2, 

 f. 3. 



Ederessa semifusca, Steph. Illust. iv. 248 ? Wood's fig. 1295. 



Expansion of the wings 5 — 6 lines. Head yellowish. Face yellowish. Palpi 

 yellowish. Antennae whitish, anuulated with black. Thorax yellowish. Abdomen 

 fuscous. Legs whitish. Tarsi whitish, spotted with black. Anterior wings purplish 

 fuscous, with the inner margin whitish to beyond the middle, where it is interrupted 

 by an ohlique deep fuscous fascia, which extends to the costa ; beyond this the inner 

 margin is again whitish to the anal angle ; the costa is very delicately spotted alter- 

 nately with deep fuscous and whitish, and about the middle is a very conspicuous 

 larger deep fuscous spot ; towards the apex is a larger whitish spot, rather hooked ; the 

 dark portion of the wing at the base projects into the whitish inner marginal portion, 

 and then reverts upwards rather more than the previous deflexion, so that the pale 

 inner margin is broadest immediately before the fascia ; at the termination of the pale 

 inner margin, at the anal angle, is a distinct deep fuscous spot : cilia purplish fuscous. 

 Posterior wings griseous, with paler cilia. 



The yellow head and thorax readily distinguish this insect from all its congeners 

 of equal size, except perhaps glaucinella, yet that is considerably smaller and the co- 

 lour of the anterior wings is totally different. 



Apparently a scarce species: I am not aware that I ever met with it myself: Mr. 

 Bedell took a few specimens at Dulwich Wood, on the 4th of June last. 



Zeller says of it, " This still little-known species is abundant at Reichstadt and 

 Nixdorf, in Bohemia, in May and autumn, on the wild service and blackthorn bushes, 

 according to Fischer-v-R. ; and I myself beat a very beautiful female, on the 7th of 

 July, 1835, on the fortifications at Glogau (where no Sorbus or Prunus grows), from 

 the leaves of a young elm. In Livonia, according to Madame Lienig, the species 

 flies in May, June and August." 



In giving the semifusca of Stephens as a doubtful synonyme I may have done 

 wrong : this species is not described in Stephens at all ; but no person acquainted with 

 the mode in which most of Mr. Stephens's descriptions are composed can fail to see 



