SIDERONE. BIA. 



321 



rounded talc-like spots in the middle of the disc of each of the fore wings, behind the dark patch at the extremity of the discoidal cell. 

 Godart describes them only in S. Isldora, and further states that it is only in the females that they occur. The British Museum col- 

 lection, however, possesses a series of S. Isidora in which every specimen, both male and female, is marked with these talc-like spots. The 

 same collection possesses two female specimens agreeing tolerably well with Cramer's figure of S. Itys, one of which has two similar spots, 

 whilst the other is destitute of them. Their place, however, is occupied by two pale patches covered with scales, liavino- a dusky 

 anterior margin. The same collection contains a fine male specimen from Para, distinct from S. Isidora and Itys, with the^wini-s, on 

 the upper side, of a rich fulvous red, with the tips and a spot in the middle of the costa black, which also exhibits the two vitreous spots. 

 Another species in the same collection, which I have named S. Itylus, has the upper surface of the wings entirely of a dark rich red 

 brown colour, without the slightest indication of the vitreous spots. The fore legs are unfortunately wanting, but the specimen appears 

 to be a female. 



SIDERONE. 



1. Sin KRONE loE. 



Siderone Ide Hlihner, Samml. exot. Schni. Band ii. pi. — . ; 

 Boisduval, Sp. Gen. Lepklopt. pi. 8. f. 1.; E. Double- 

 day, List Lep. Brit. MIus. p. 1 13. 



Nyinphalis Rogerii Godart, Enc. M. ix. p. 371. n. 73.; 

 Lucas, Hist. Nat. Lep. e.cot. t. 67. f. 1. 

 Brazil, St. Domingo, Cuba. B. M. 



2. SiDEK. Mabthesius. 



Papilio Marthesius Fabricius, Ent. Syst. iii. pt. 1. p. 153. 



n. 469.; Cramer, Pap. pi. I9I. f. A. B. ; Godart, Enc. 



M. IX. p. 371. n. 72. (Nyniphalis M.); Hiihner, Verx. 



hek. Schm. n. 307. (Historis jMartli.) [An var. S. Ide.'] 



Guiana. 



3. SiDER. Gaianthis. 



Papilio Galanthis Fabricius, Gen. Ins. Mant. p. 2.57., 

 Eut. Syst. HI. pt. 1. p. 4(). n. 142. ; Cramer, Pap. 

 pi. 25. f. D. E. ; Godart, Enc. M. ix. p. 422. n. 228. 

 (Nymphalis Gal.) ; Hiibner, Verz. bek. Schm. n. 362. 

 (Nessiea Gal.). 

 Surinam. 



4. SiDEB. IsinouA. 



Papilio Isidora Cramer, Pap. t. 235. f. A.B. E. F. ; Fah. 

 Ent. .Syst. in. pt. 1. p. 78. n. 244.; Donovan, Ins. uf 

 India, pi. 3.". f. 4. ; Godart, Enc. M. ix. p. 371. n. I7. 

 (Nymphalis Isid.). 



Zaretis Isidora Hiibner, Verz. bek. Schm. u. 452. 

 Brazil to Mexico. B. M. 



5. SiDER. Itys. 



Papilio Itys Fabricius, Spec. Ins. ii. p. 60., Ent. Syst. 

 III. pt. 1. p. 73. n. 230. ; Cramer, Pap. pi. 1 1 9. f. F.G. ; 

 Godart, Enc. M. ix. p. 370. n. 70. (Nymphalis Itys); 

 Hiibner, Verz. bek. Schm. n. 298. (Apatura Itys) ; 

 Doubl. Westw. &; Hewitson, Gen. Diurn. Lep. pi. 53. 

 f. 1. (Siderone Itys). 

 Surinam. B. M. 



6. SiDEB. Itvlus Westw. nov. sp.* 



Rio Janeiro. 



7. SiDEB. Zethus Westw. nov. sp.t 



Para. 



B.M. 

 B.M. 



GemisLXXXIII. BIA ITidmcr. 

 MoRPHO (JodK, Guerin-Meneville. 



Body slender ; wiug.s large ; fore wings with a large metallic spot ; hind wings gradually produced into a tail at the 



anal angle. 

 Head rather small, finely hairy, with a small frontal tuft ; neck narrow. 

 Eyes large, prominent, naked. 



Labial Palpi rather long and slender; tip acute, obliquely elevated nearly to the level of the top of the eyes; 



second joint long, narrow, scaly, with a row of fine short hairs on the back, extending from the base to the tip, 



not forming a reflexed mass applied to the face ; terminal joint short, slender, and acute at the tip. 



Antenna; short (not near half the length of the fore wings), very slender, curved; the club very slender, gradually 



formed, and a little bent downwards, vei'y finely carinatcd on the inside ; articulations throughout very distinct. 



Thorax small, oval, finely hairy. 



Fore Wings very large (especially in the males), subtriangular. Anterior margin very much arched ; apical 

 angle rounded. Apical margin convex, about thi'ee fourths of the length of the anterior. Inner margin 

 straight, a little longer tlian the apical. Costal, median, and submedian veins much swollen at the base, 

 especially in the males. Costal vein extending a little beyond the middle of tlie costa ; throwing off an 

 additional branch, which joins the costa a little beyond its extremity. Postcostal vein throwing oft" a first 

 branch close to the middle of the length of the wing, which joins the costa at about two thirds of its length 



* Siderone alis omnibus supra fusco-ferrugiiieis ; anticis fascia abbreviata angulata ad apicem celluloe discoidalis apiceque lato fuscis, disco absque maculis 

 vitreis, margine apicali convexo ; posticis angulo externo acuto, margine integro ; alis subtus griseo-brunneis, anticis ad apicem albo irroratis, posticis lii.ca 

 media obliqua obscura. Exp. alar. unc. 2|. 



+ Siderone alis omnibus supra rufo-l'ulvis ; anticis macula angulata ad apicem area; discoidalis apiceque lato fusco, disco maculis duabus vitreis, margine 

 apicali vakle emargiiiato ; alis posticis angulo externo subobtuso striga subrepanda subapicali fusca ante marginem analem evanescenti punctisque tribus 

 minimis nigris versus aiigulum an,alem ; subtus fernigineo-gri.seis, posticis niagis purpureis, striga transversa obscuriori. Exp. alar, fere unc. 2',. An mas 

 S. Ityli? 



