72 MEMOIRS NATIONAL ACADEMY OF SCIENCES. vol. xii, 



plate differs in shape and armature, being small and short, with a basal pair of small spines, and 

 a second much longer pair directed backward. 



[A later memorandum by Dr. Packard is as follows:] 



Eudaemoniidge; perhaps family. [Larva] with many setae on tubercles, but on trunk as 

 well as at top. Evidently derived from Bunsea group. (Bunaeinae have no pro thoracic spines, 

 none on suranal plate, and all spines simple, unisetose.) 1 



EUDAEMONIA Hiibner. 



Bombyx Fabricius, Species Ins., II, p. 170, 1781; syst. Ent., p. 414. 



Eudaemonia HCbner, Verzeichniss bek. Schmett., p. 151, 1822? 



Saturnia (Eudaemonia) Westwood, Edit. Drury, I, 111. Exot. Insects, III, p. 39, 1836. 



Eustera Duncan, Naturalists' Libr., Exot. Moths, p. 125, 1841. 



Eudaemonia Walker, Cat. Lep. Het. Br. Mus., VI, p. 1265, 1855. 



Eudaemonia Kirbt, Syn. Cat. Lep. Het., I, p. 767, 1892. 



Imago. — s and 9 . Head moderately large, front squarish, the sides parallel, not converg- 

 ing in front. Eyes rather large. Antennae plumose, pectinated to the tip, slender, joints in 

 the middle long, about twice as long as broad and slender; the pairs of pectinations are remote 

 from each other, and there is only a single (the basal) pair to a joint; the branches are long 

 and slender, considerably longer on the outside than on the inside, with very fine cilia. The 

 palpi are very slender and of remarkable length; the end of the second joint extending just 

 beyond the front; the third joint is very slender, long and pointed, nearly as long as the second 

 joint, and slightly thickened at the end. The maxillae are present but very slender, separate, 

 nearly hah as long as the palpi. The body is slender, weak, and the thorax is not very thick. 



Fore wings short and broad, costa straight on the basal three-fourths, convex toward the 

 apex, which is obtusely pointed; outer edge full and convex, a third longer than the inner edge 

 (which is straight) and bent in the middle, while the edge is slightly scalloped. Hind wings 

 small, narrow, and (except the tails) triangular; costal edge slightly curved ; apex much rounded ; 

 outer edge straight, slightly scalloped; inner angle produced into a phenomenally long narrow 

 "tail," flaring or widening toward the end which is paddle shaped and twisted and sublobate, 

 the tail being from about three (?) to five ( S ) times as long as the main portion of the wing, 

 which latter extends a little beyond the end of the abdomen. 



Legs long and slender; on the first pair of tibiae (of both sexes) is a rather long, large 

 epiphysis, about two-thirds as long as the tibia itself. 



Abdomen slender, the tip rather obtuse in <? , concolorous with the body, but that of 

 9 broad, rounded, and clothed with very short dense scales, with two lateral tufts on each 

 side (scent sacks?). 



Venation: In fore wings somewhat as in Urota; but vein \l x arises as in Ludia, half way 

 between the origin of vein II 3 and of the common stalk of veins 11^ and III 2 ; no vein II 2 ; form 

 and size of the discal cell as in Urota; vein III 3 a little nearer the middle of the extradiscal space 

 than in Urota; discal veins forming a single short straight line situated half way between the 

 base and the end of vein III 3 ; origin of branches of the median veins (III 3 and IV 2 ) as in Urota. 

 Hind wings not greatly departing from the type of Urota and Ludia, though much affected by 

 the shape of the wing, and the enormously long tail; vein III 2 about one-half as long as IIIj, 

 the space between these and veins II and IIL. very wide and short; vein III 3 ending on the inside 

 of tip of the tail; IV^ on the outer side of the tip, and IV 2 , on the basal third of the tail; they 

 arise at nearly equal distances apart, and the discal veins together form an oblique bent line. 



1 [The very distinct genus Copiopteryx Duncan, the species of which have been confused with Eudaemonia on account of the form of the the wings, 

 was not studied by Dr. Packard. The moths have very long tails on the hind wings, and occur in South America. The species in the U. S. 

 National Museum may be tabulated thus: 



Primaries with no fenestra on outer side of postmedian band; discal fenestra greatly elongated, more or less L-shaped; outer margin of primaries 

 not dentate or crenulate ... derceto (Maass. & Weym.) 

 Primaries with a fenestra on outer side of, touching, postmedian band. 



Primaries with a large, dark, discal blotch, but no median dark band, the fenestra very small ...Jehovah (Strecker); French Guiana. 



Primaries with a transverse, suffused, variable dark median band; outer margin of primaries very strongly and coarsely crenulate-dentate ... 

 sonthonnaxi Andre - ; Rio Janeiro. 



Primaries with no median zigzag band; tails of hind wings excessively long and slender ... semiramis (Cramer); Rio Janeiro and British Guiana.] 



