MEMOIES OF THE NATIONAL ACADEMY OF SCIENCES. 129 



I am inclined to a.t;iee with Mr. Dj-ar that this is a variety of /. apicalix. I am unable, 

 Lowever, to see any important difference between 7. apiadin, var. iiicurccrida^ and alctlic Neuni. 

 and Dyar, tliouf;li 1 leave it as a synonym of bntcei, as Mr. Jjentenmiiller susigests, Dyar agreeing 

 with his view. 



The following acu-ount of tlie pre]>aratory stages of Tchlhiinnt liijiria ITy. Edw., by Dr. Harrison 

 <j1. Dyar, is copied from the Entomological News, 1892, j). ■>: 



Eijij. — Hemispberieal ov slightly ooiioidiil, the base Hat, but iimiikUmI at its edges; sniootli uiiiler a lens, but under 

 tbo mieroscope covered with luinierous, crowded, shallow depressmns, which form by their edges narrow, roundedly. 

 hexagonal reticulations. The color is ilark gray before the egg hatches. Diameter, 0.7 mm. 



First stage. — Head shining black, labrum pale; width, 0.35 mm. liody slightly flattened, whitish ; cervical shield 

 bl.iik ; a. few pale hairs; joints 5 and 12 are slightly enlarged dorsally ; the lateral region and joints .">, 7, and 12 

 dorsally are wiue red. Thoracic feet large, pale; the abdominal normal, all used in walking. Length. 2..") mm. The 

 larva hatches by eating a round lloll^ in the vertex of the egg, leaving the rest of the shell untouched. 'It lives, 

 singly, in a shelter constructed by spinning two or miiro leaves together. 



Second slni/e. — Head black and shining, the central suture deeji; width, O.tiri nnn. liody flattened, jiale whitish 

 yellow, with narrow triplicate dorsjxl, and very liroad lateral baudsof dull wine color, as are also the litimps on juints 

 5 and 12. Cervical shield and anal plate black; venter dull greenish ; legs black. 



Tliiid stage. — Head flat iu front, slightly bilobed, brownish black, but paler centrally around the clypeus; a few 

 dark hairs; "width, 1.4 mm. iSody jiale yellow; joints h and 12, a triple dorsal line, broad lateral and confused triple 

 subveutral lines all dark brown. Cervical shield and anal plate blackish ; scattered pale hairs arise from smooth, 

 low, round tubercles, coucolorous with the markings. 



Fourth stage. — Head pale brown, shaded with black in front; jaws and ocelli black; a. white shade on each side 

 of the clypeus; width, 2.6 ram. Body as before, but the lateral band is faintly divided bj- a double ytdlo wish line, and 

 joint 13 is nearly all yellowish. The round, smooth, piliferons tubercles are distinctly yellow in the yellow ujarkings. 

 Cervical shield small, bisected, p.ale brown; anal plate not distinguishable. Hair whitish, both from bodyandhead. 

 As the stage advances the colors become quite pale, and the appearance is nmch changed; humps on joints .5 and 12 

 very slight, dark purjile. (iround color wliitish gray, becoming pale purple, a triplicate dark jiurple dorsal line, the 

 central one most distinct, the others broader and diffuse. .Ml these lines are more or less broken into luottlings. A 

 similar stigmatal line with some purple mottlings subventrally ; venter paler; spiracles black. The piliferons 

 tubercles are normal iu arrangement, much as the warts iu llalesidotu; row (4) small, posteriorly to the spiracles, row 

 (7) apparently absent. The head is held out flat, as in Glnphisio. 



Coeoiin. — Composed of several leaves spun together and lined with threads. 



Pupa. — Xearly cylindrical, flattened a little venlrally, gradually tapering posteriorly, but of nearly even width, 

 no part enlarged; last abdominal segments rounded, cremaster long and sleuder, terminating iu a knob that, under 

 the microscope, is seen to consist of a row of radiating, strongly recurved hooks, which hold lirmly to the silk of the 

 ■cocoon. Color dark red-brown, the thorax and cases nearly black. Length, 11 mm. ; width, 3.5 mm. 



Food i)Iaiit. — Willow (Salijc). 



Larva' from Yosemite Valley, California. These larvie had but four stages, and there are two broods in a year. 



IrhtJnjiira hifiria, as well as /. briicei Hy. Edw., must come very near /. ran Fitch, if they are not merely Western 

 forms of it, but the larva of /. ran is still unknown, so that it is impossible to comiiare the early stages. 



We now return to the normal /. upicalis. 



Cocooit. — The cocoon which I have is more completely formed than that of I. inchisn, the 

 surface ne.Kt the leaves being a continuous firm web, more cocoon like. It is tent-like and simn 

 between two leaves, as in I. incUtsa. It measures 22 by 15 mm. 



Pupn. — Not so full, rounded, and blunt at the end as in that of I. iiiclusa. Abdominal 

 segments with scattered coarse punctures, and the surface is dull, not so shining as in I. inclu.sa. 

 Cremaster slenderer than in J. incluutt, the two dorsally curved hooks not so broad and thick as 

 In I. inclusa and about half as large. Length, 10 mm. 



Bidiit.s. — In general the same as those of J. inclKsa, the moth laying its eggs in northern 

 New England probably late in June and iu July, the larva' occurring throughout August. In Mdes 

 City, Mont., the eggs are stated by Mr. Wiley to have been laid ou the willow as early as May 24. 

 Whether it is dotdile-brooded remains to be seen. It occurred in Kansas May 21. (Bruner). 



Food plant. — The normal New England form of apimli.s feeds on the a.spen, while "the pale 

 western form astoria'^' iu Montana feeds on the willow. 



Gcofiidphicol (lisfrihiifiou. — The species with its varieties range from New England, including 

 the colder portions, as Franconia, N. II., to the Pacific Coast. It is to be looked for throughout 

 the greater part of the "cold temperate subregion of Allen, or the boreal (Canadian) province 

 of authors from lower Canada ((Juebec Province) westward to Alaska." It also spreads in its 

 varieties {ornafH, hlfir'ui, ami astoritv) through the A])palachian and Campestrian subproviuces, 

 •including Montana, Washington, and California. Xav. itidcntatri, New Jersey, Pennsylvania, 

 S. Mis. 50 9 



