470 Insects. 



Het. tricolor, Hope. The British Museum possesses a pair of this 

 species, and I am thus enabled to correct an error in Mr. Hope's fi- 

 gure and in his character of the genus, though for some time I have 

 hesitated as to whether or no I could consider them identical with 

 Mr. Hope's insect, having been assured by Mr. Westwood that the 

 antennae in that individual were undoubtedly setaceous. This was 

 about a year and a half since, when 1 first exhibited at the Entomo- 

 logical Society the specimen of H. ^Edea now in the Museum cabinet, 

 and after pointing out its identity with .Clerck's figure, expressed an 

 opinion that it was congeneric with H. tricolor. Since that time, 

 however, Mr. Westwood, probably forgetting the precise words of my 

 remarks, has stated that H. tricolor, Hope, is synonymous with P. 

 iEdea, Linn. Although this statement is incorrect, it confirms my 

 opinion of the two insects belonging to the same genus, and leads to 

 the inference that Mr. Westwood has found that the antennae, as fi- 

 gured in the ' Linnean Transactions,' are erroneous. 



The truth is that the antennae of this genus offer a structure as sin- 

 gular as any which I know to exist in the nocturnal Lepidoptera. In 

 the male they are strongly bipectinate ; in the female they are much 

 longer than in the male, the pectinations, except at the apex, so short 

 as to be hardly observable, but at the apex they are longer and lamel- 

 liform, forming when closed a compact club, but evidently capable of 

 being expanded, as in the lamellicorn beetles. On this, however, I 

 have some further remarks, but must defer these to a future time, when 

 I shall point out the tendency to this structure in the genera Chalco- 

 sia, Erasmia and Amesia. 



Genus. — Papilio. 



Papilio Turnus, L., and P. Glaucus, L. These insects in reality 

 are but one species, the latter being an obfuscated variety of the for- 

 mer.* This fact was pointed out to me by Mr. D. Dyson, of Manches- 

 ter, an intelligent young man, originally a weaver at Oldham, whose 

 zeal for Entomology carried him out last year to the United States. 

 To myself the idea had never occurred, but I have only once or twice 

 seen P. Glaucus on the wing, and then soaring above the underwood, 

 which I had only seen P. Turnus occasionally do, and which I ima- 

 gined to be the constant habit of P. Glaucus, L. In this I have found 



* Boisduval perhaps suspected this. He thrice, in his description of P. Glaucus, 

 compares it to Turnus, and adds in a note, " Ce beau Papillon, malgre sa couleur 

 noire, a beaucoup dc rapports avec Turnus sous ses premiers etats.'' 



