MEMOIRS OF TUE NATIONAL ACADEMY OF SCIEXCES. 115. 



more sliiiiiiiii' than iu 7>. per.^iiyiciin; in tbe latter species the metauotuin varies in l)cinfi' I'itlicr 

 imnrtnrcd or not. Creuiaster almost exactly as in J). perxpiciKt, but the underside is nearly 

 smooth, not so coarsely corrugated, and without the six longitnilinal ridges of D. 2>t'i'>il>i<ii<i: the 

 four spines are nearly as iu />. p<-rspicii(i. The 9 has oue sexual seai-. which is long and 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 tlie tenth abdominal segment with live or six teetli, the teeth 

 less ridge like and regular than 7>. pcrspicua. 



h'c'inarls. — Vestiges of the abdominal legs ap[)ear in these pniia. On the fifth and sixth 

 segments is a pair of irregular tubercles, none exactly alike, the left one on the hfth abdominal 

 segment being conical. The rudiments of the anal legs are (]uite distinct. In pupa of B.jx'rspieua 

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

 their being imperfectly absorbed during the i)rocess of i)Ui)ation, were also observed in the pupa 

 of a Datana from Olympia, Wash., indicated ou fourth and fifth abdominal segments by a deej) 

 crescentiform depression, ])erhaps representing the outer and inner edge of the planta. Similar 

 vestiges were observed in the pui)a of T>. (dujuhH. For specimens [ 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. 



Habits. — Eggs of second brood dei)0'<ite(l July 25; larvae of second brood in July, August, 

 and September, Xew York and Maryland. lUiley.) "They always keep iu close clusters and feed 

 together." (Le Conte.) 



FdoiI phint. — Andromcdd ligustriiw, and in Georgia on Andromeda mariana. 



(Tcofirdphical distribution. — Xew Bedford, Mass. (Miss I^lliot); ^lassachnsetts (Mrs. Fernald); 

 NarragansettPier, li. I., and Xewburg, N. Y'. (]Miss Morton), (U. S.Nat. Mus.); Maryland (Stratton 

 Coll. Ent. Soc. Phil., U. S. Nat. Mus.); Arkansas (Palm); New York, TifBn, Ohio; Maryland, 

 Savaunah, Ga. (Le Conte); Carbondale, 111. (French). 



Dataua floridaiia (Jraef. 



(PI. II. lig. 11, J:V2. 9.) 



Dcituna Hofiilana Graef, Bull. Rrooklyu Ent. Sue, ii, p. 37, Sept., ISTtl 

 Giote, New Cheek List X. Amer. Mollis, p. IS, 1882. 

 Smith, List Lep. Bor. Amer., p. 30, 1891. 

 Kirby, Syii. Cat. Lep. Het., i, p. (513. 1892. 

 Xeuiu. ami Kyar, Traus. Aiuer.Ent. Soe.,xsi, p. 198.1894: .lourii. X.V. Ent. Soe.,ii, p. 116. 189+. 



Larva. 



(PI. XIV, tig. 1.) 



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

 Di/ar. Psyche, vi. p. 573. 1893. 



Moth. — As in J>.palmii. but browner, the pale scales less iirominent. the lines less contrasting, 

 obscure. The discal dots are, howe\er, more distinct than in J>. pabnii. Secondaries moie 

 heavily tinged with brown. The Florida specimens show very little of the whitish or iiale lilac 

 tint, while specimens from Long Island are almost as pale as I>. pohnii from the Catskills. 



Save J^. palmii. the species has no very close allies. In general aiipearance it comes nearest 

 to J>. intef/errima, but differs obviously in its purplish tint and entire lack of pale shades bordering 

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



Lnrra. — ■' 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 ou the line of, and inter- 

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

 somewhat broader black space. The head, the summit of the body-segment, the anal covering, 

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

 the last segment are partially aborted. 



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

 back the head and tail o\er the body when disturbed.'' (Koebele.) Larv;e in October, moths iu 

 March, Florida (U. S. Nat. Mu.s.). 



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



Oeographkul distribution. — Florida (Graef, French;. 



