GENUS CASTNIA AND SOME ALLIED GROUPS. 173 



Obs. C. futilis, Walker (List Lep. Brit. M. pt. vii. 1856, p. 1581), from. Nicaragua, is 

 described from two old faded and rubbed specimens of tbis species in tbe British Museum. 



Sab. Brasilia, Guatemala, Nicaragua, Honduras, Venezuela, Columbia, Bogota. In 

 Mus. Britann., Hopeiano Oxonise, Boisduval. 



16. Castnia iicus. C. alis fusco-nigris metallico nitidis, anticis fascia media recta postice 

 attenuata ad angulum internum extensa, alteraque subapicali sinuata maculari; 

 alis posticis fascia magna alba obliqua, versus costam attenuata, ad angulum 

 analem valde dilatata, serieque marginali macularum rubrarum. Long. corp. unc. 

 lj-lj. Expans. alar. unc. 3^-4 (7-11 centim.). 



Var. a fascia maculari subapicali alarum anticarum fere obliterata. 



Var. (3 alis anticis lutescentibus, basi, apice, marginibus fascise mediae nigris, maculis 

 alarum posticarum pallide fulvis. 



Papilio Reus, Fabricius, Ent. Syst. iii. 1, p. 47; Herbst, Ins. pi. 134. f. 3, 4; Drury, Ins. i. pi. 16. f. 1, 2; 

 Merian, Ins. Surinam, pi. 36; Oliv. Enc. Meth. Ins. pi. 12. f. 4; Jones, Icones, iii. pi. 73. f. 3, 4; 

 Godart, Enc. Meth. ix. p. 797 {Castnia Reus) ; Cramer, iii. pi. 223. f. A, B ; Dalman, Monogr. 

 p. 13; Act. Holm. 1824, {Castnia Reus); Gray, Trans. Ent. Soc. L. ii. p. 143; Walker, List 

 Lep. Het. B. M. i. p. 18 ; Cuvier, Regne An. ed. Crochard, Ins. pi. 145. f. 1, 2 ; Boisduval, H. n- 

 Lep. Het. p. 526 ; Chenu, Ency. Pap. 235. f. 402. 



Obs. I am inclined to believe tbat tbis supposed species is formed of individuals of 

 C atymnius, tbe cbief difference consisting in the submarginal rows of red spots on the 

 hind wings, which, indeed, vary both in number and size in the specimens in the Oxford 

 Museum. Several faded specimens in the Hopeian Collection, marked C. futilis by Mr. 

 Walker, only differ from similar faded specimens of C. atymnius (also labelled C. futilis 

 by Mr. Walker) in having a few slight orange marks near the angle of the hind wings. 

 Var. a alis posticis fascia brevi alba e disco ad angulum internum extensa margine 

 aurantiaco {Walker, op. cit. vii. p. 1582). 



Sab. America meridionalis, Ecuador, Trinidad, Cayenne, Surinam, Demerara, Para, 

 Brazil, Ega (Amazonia) ; mouth of river Una, near Para, 19 Jan. 1830 {Burchell) ; 

 Upper Orinoco (larva in Orchiclearum radicibus). In Mus. Britann., Hopeiano Oxoniae, 

 Boisduval. 



17. Castnia Boisduvalii. Mas C. alis anticis purpureo-fuscis metallico nitidis, basi, 

 macula trigona media costali, altera magua trigona inter medium costag et apicem 

 (guttas tres pellucidas gerente), his maculis intus cum altera magna trigona (e 

 medio marginis interni ad angulum externum extensa) connexis ; alis posticis basi 

 nigris, in medio macula magna aurantiaco-rufa marginis antici, in strigam tenueni 

 ad marginem analem extensa, limbo late nigro, rufo plus minusve maculato, maculis 

 duplici serie congestis. Long. corp. unc. 1^. Exp. alar, antic, imc. 2ij— 4 



Eoemina differt abdomine albo, macula postica alarum anticarum extus griseo-suffusa, 

 absque posticis fascia media lata ad marginem analem extensa maculisque mar- 

 ginalibus omnibus fiavidis. 



Castnia Boisduvalii, Becker, MS.; Walker, List Lep. Het. B. M. i. p. 27; Scliaufuss, Nunq. Otiosus, 

 p. 9; Boisduval, H. n. Le"p. Het. p. 510. 



2 A2 



