LEPIDOPTERA HETEROCEEA. 1201 



Wings very ample, each with a very large vitreous more or less irre- 

 gularly triangular spot. Fore wings more or less convex in front, 

 very generally more or less falcate at the tips, and more or less un- 

 dulating and oblique along the exterior border; interior angle 

 rounded ; discal areolet open, intersected by a secondary vein ; three 

 inferior veins ; first and second united at the base ; third very re- 

 mote. Hind wings more or less broader than the fore wings. 

 Male. — Antennae extremely deeply pectinated ; branches in pairs, 

 slender, thickly ciliated, opposite each other, very numerous. 

 Female. — Antennae rather deeply pectinated ; branches slightly 

 ciliated. 



Mexico. 



1. Attacus Oeizaba. 



Alee anticce maris subfalcatce ; postica? elongatce ; in utroque sexu 

 fulvce, fusco cinereoque varice, omnes plaga magna triangulari 

 (in omnibus a lis cequali), apice extus in strigam undatam 

 albam intus nigro marginatam* insidente, macula subapieali 

 alarum anticarum e guttis tribus nigris composita, linea 

 tenuissima nigra valde undulata submarginali serie macularum 

 parvarum in alis posticis includente. 



Saturn ia Orizaba, Westw. Ann. Nat. Hist. 2nd Ser. xv. 294. 



Very nearly allied to A. Aurota. 



Mexico. 



Var. ? Mas et fcem. Ferrugineus ; thorax albo bifasciatus. 

 A. Aurotae simillinius, fascia exteriore plus undulata, margine 

 purpureo angustiore. 



Male and female. Very much resembles A. Aurota, but may 

 be distinguished by the foreside of the interior band of the fore 

 wings, which is much less inclined towards the base of the costa ; by 

 the exterior band, which is more deeply undulating, and whose 

 purple outer border is much narrower and less diffuse ; by the vitreous 

 spot of the fore wings, which is larger and interrupts the exterior 

 band. Ferruginous. Thorax with a white band in front, and 

 another behind. Wings with the markings and vitreous spots 

 much like those of A. Aurota. Length of the body 14 lines; of 

 the wings 66 lines. 



a, b. Mexico. Presented by E. Doubleday, Esq. 



