172 .AIEJIOIIJS OF THE NATIONAL ACADEMY OF SCIEXCES. 



the appearance of the European ^V. dromedariim, as each abdominal segment from the first to the- 

 nintli bears a hxrge, fleshy, two-toothed hump, the three largest on segments 3 to 5. Thus the 

 outline of the back is serrate, and perhaps mimics the serrate edge of the leaf of the elm on which 

 it feeds. The body is greenish, with the upper half of the sides washed with white, with crimson 

 spots and bands, the tip of the dorsal protuberances being also crimson. 



Mr. Marlatt does not state whether the dorsal tubercles are movable, or whether the caterpillar 

 is protected by mimicking the outlines or the colors of the leaves of its food plants. Further 

 observations are needed on this point. 



Cocoon. — "The cocoon is formed on the surface of the earth, and consists of loose, yielding 

 silk and earth." (Riley.) Marlatt states that the caterpillars s[)iu "('oeoons of stout, brownish 

 silk in folded leaves or under some slight protection at the surface of the soil, concealed by 

 particles of earth. 



Pupa. — The body is rather thick, the cremaster very blunt, with a long, slender, acute point 

 bearing very short curled setre, and divided at the end into two minute forks. Surface of the 

 body with shallow sparse pits; on the sutures of the abdomen very finely shagreened. Length, 

 10-18 mm. "The pui)a was very active, rolling a foot or more at a time." (Soule.^ 



I am indebted to Miss Caroline G. Soule for the excellent colored figure of the larva on PI. XIX. 



Eahifs. — Mr. Marlatt has published in the Transactions of the Twentieth and Twenty-first 

 Annual JNIeetings of the Kansas Academy of Science (18S7-SS) an account of the habits and 

 transformations, with the accompanying figures, of this singular Xotodontian. It appears to be 

 double brooded, as the moths appeared in Kansas froni May to June, and the females deposited 

 their eggs at that time, a second brood of moths probably appearing about the 1st of August, 

 as the caterpillars became fully grown September 11 to 21. They spin cocoons of stout, brownish 

 silk within folded leaves (flg. GQil) or under some slight i)rotection at the surface of the soil, 

 concealed by particles of earth. 



I once found the larva on the elm at Providence fully grown September 3, but failed to- 

 describe it; it pupated September (i, and the moth appeared in May of the following year. 



We are indebted for the following notes on the larva to Professor Riley: 



Found September 16, 1869, at Bellville. on the common elm, a most singular caterpillar, September 26, 1869, 

 they all descended to the ground and formed their eocoon.s in the same corner of the breeding cage. It issued the 

 following May 4, 1870. From a larva found feeding on the elm August 26 the moth issued September 21. (Fifth 

 Rep, 1^, S. Ent. Comm. p, 267,) 



]\Ir. Dyar writes that he has found the larva in its second stage early in the summer (June) 

 in its " perch." at Keene Valley, Essex County, X. Y. 



Food plant. — It has not yet been found on any other plant than the elm. 



Geogrnphicnl distribution. — The genus ranges through the Appalachian into the eastern 

 portions of the Cam])estrian subprovince, not having yet been observed west of the great plains. 



Franconia, X. II. (Slosson); Brookline, Mass. (Miss Soule); Amherst, ^lass. (Mrs. Fernald); 

 Trenton Falls, X. Y'. (Doubleday); Providence, R. I. (Packard); Xew York (Grote); Missouri 

 (Riley and Miss Mnrtfeldt); Eastern Kansas (Marlatt); Topeka, Kans. (Popenoe); Canada, 

 Maine, JIassachusetts, Xew Hampshire, Wisconsin, Ohio, Carbondale, III. (French); Plattsbwrg,, 

 X. Y'. (Hudson); Xew Jersey, Pennsylvania (Palm); Chicago, 111. (Westcott). 



Dasylophia Packard. 

 (PI. XLII, fig.s. ."), 5a, 6, venation.) 



FlinUvna Abbot ,aud Smith, Nat. Hist, Lep, Ins, Georgia, p. 167, Tab, LXXXIV, 1797. 

 Kritodoniu Harris, Cat. lus, Mass., p. 73, 183.'5. 

 Datmiai Walker, Cat. Lep. Br. Mus,, v, p, 1062, 1855. 

 Datanai Morris, Synopsis Lep. N. .\uier,, p 2-17, 1886. 

 Dasylophia Pack., Proc. Ent. Soc. Phil,, iii, p. .362, 1864. 



Grote, New Check List N, Amer, Moths, p. 19, 1882. 



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

 Halima Kirby, Syn. Cat, Lep. Het,. i, p. 569. 1892. 



Dosjilopliia Ncum. and Dyar, Trans. Amer. Ent, Soc, xxi, p. 200, .June. 1894; .lourn. N, V, Ent, Soc, ii, p, 116, 

 Sept,. 1894. 



Moth. — Head large and rather }iromincnt, vertex witli two high jiointcd erect tufts, the tips of 

 which meet over the vertex, reaching to the level of the thorax in 5 . a little shorter in S . 

 Antcnnte with long slender jjectinatious on the basal two-thinls, while the remaining third is 



