MEMOITiS OF TOE NATIONAL ACADEMY OF SCIENCES. 115 



more sbiniiig than in 1>. perspicmi; in the. latter species the metauotum varies iu beiug either 

 pniK-tiireil or not. Creinaster ahiiost exactly as in D. perspicua, bnt the underside is nearly 

 smooth, not so coarsely corrugated, and without the six longitudinal ridges of I>. pcrspiciia; the 

 four spines are nearly as iu I>. pcrspiciia. The 9 has oue sexual scar, which is long aud linear: in 

 the i the region on each side of the genital fossa or scar is regularly swollen, the surface convex. 

 The transverse fossa at the base of the tenth abdominal segment with five or six teeth, the teeth 

 less ridge like and regular than J>. pcr.fpiciin. 



liciiKtrls. — Vestiges of the abdominal legs appear iu these pupa-. On the tilth and sixth 

 segments is a pair of iri-egular tubercles, none exactly alike, the left one on the fifth abdominal 

 segment being conical. Tlie rudiments of the anal legs are quite distinct. In pupa of T>. pcrKiiicita 

 there are faint vestiges of legs on the sixth segnu^nt. Vestiges of abdominal larval legs, due to 

 their being imperfectly .absorbed during tlie process of pupation, were also observed in the pupa 

 of a Datana from Olynipia, Wash., indicated (in fourth and fifth abdominal segments by a deep 

 crescentiform depression, perhaps representing the outer and inner edge of the planta. Similar 

 vestiges were observed in the pupa of D. angusii. For specimens I am indebted to Miss Ida M. Elliot. 

 The markings of the larva whose lines are divided Into spots, indicates that it may be the latest 

 form of the genus. 



ifnZ(/7s.— Eggs of second brood deposited July 25; larvae of second brood in July, August, 

 and September, New York and .Maryland. (Riley.) "They always keep in close clusters and feed 

 together." (Le Conte.) 



Food 2)htHf. — AiKlromcdu lif/ustrinii, and in Georgia on Andromeda mariaiia. 



Geofiraphical distribiitioiL — New Bedford, Mass. (Miss Elliot); ^Massachusetts (Mrs. Fernald); 

 NarragansettPier, E. I., aud Newburg, N. Y. (Miss Morton), (U. S. Nat. Mus.); Maryland (Strattou 

 Coll. Ent. Soc. Phil., U. S. Nat. :\Ius.); Arkansas (Palm); New York, Tiffin, Ohio; Maryland, 

 Savanuah, Ga. (Le Coute); Carboudale, 111. (French). 



Datana floridana Graet'. 



(PI. II, fig. U, s ;!-', 9.) 



Datana floridana Graef, Bull. Brooklyn Ent. Soe., ii, p. 37, Sept., 1879. 

 Grote, New Check List X. Amer. Moths, p. 18, 1882. 

 .Smith, List Lap. Bor. Amur., p. 30, 1891. 

 Kiiby, Syu. Cat. Lep. Het., i, p. (il3, 1892. 

 Xeum. aud Dyar, Trans. Amer. Ent. Soc.xxi, p. 198,1894; Jonrn. X.Y. Ent. Soc.,ii, p. 116. 1894. 



Larva. 



(PI. XIV, fig. 1.) 



Eoehele, Bull. Brooklyn Ent. Soc, iv, p. 21, 1881. 

 Diiar, P.'^yehe, vi, p. 573. 1893. 



Moth. — As in D.paJmii, but browner, the pale scales less jirominent, the lines less contrasting, 

 obscure. Tlie discal dots are, however, more distiuct than in 1). palmiL Secondaries more 

 ■ heavily tinged with brown. Tlie Florida specimens show very little of the whitish or pale lilac 

 tint, while specimens from Long Island are almost as pale as D. palmii from the Catskills. 



Save I>. palmii, the species has no very close allies. In general appearance it comes nearest 

 to D. iiitcf/errima, but differs oOviously in its purplish tiut and entire lack of pale shades bordering 

 the lines. (Dyar.) (For Dyar's description of the larva see A]ipendix A.) 



Larra. — •' The larva is black, with eleven parallel yellowish lines running the full length of the 

 body. There is one immediately between the legs under the body, one on the line of, and inter- 

 rupted by. the legs, the rest above aud equidistant from each other, leaving the back with a 

 somewhat broader bhu;k space. The head, the summit of the body-segment, the anal covering, 

 and the summits of al! the legs are deep mahogany-red in color. The feet are all black; those on 

 the last segment are partially aborted. 



Habits. — "It hiis the habit, which seems to be common to the genus, of raising and throwing 

 back the head and tail over the body when disturbed." (Koebele.) Larvie in October, moths iu 

 March, Florida (U. S. Nat. Mus.). 



Food plant. — Andromeda mariana L. (Eiley). 



Geographical distribution. — Florida (Graef, Frencli;. 



