182 MEMOIRS OF THE NATIONAL A('AI)E:MY OF SCIENCES. 



wing the IStli of Febiuai'y. Others spun on the 29tli of March, and came out on tlie 2(1 of May. 

 The wliole brood feeds together, especially when small." 



Mr. -lames Fletcher re])orts that in 188-4 the caterpillars iippeaied in great numbers and were 

 most uiinrious to botli oaks and nm])les at Ottawa, Canada. (Kep., 32.) 



It IS common on white oaks in Kliode Island and ilaine late in August and through September, 

 those observed at Providence spinning a thin cocoon between the leaves early in October and until 

 October 20-28. October 5 I found some small larva' (i)rol)ably next to the last stiige) witli the 

 stripes straw-yellow instead of orange. The moth appears in June in the northern States. 



Mr. Beutenmiiller publishes the following notes ou its transformations: "The eggs from wliicli 

 my observations were nmde were laid on June 10, and the young larva- emerged 071 .July 2. The 

 lirst Tuolt took place on July 9, the second molt ou July 17. the third molt ou July 24, the fourth 

 on July .SO, and the last molt on August.4. The larv* were liilly grown on August 12." He adds 

 that it is single-brooded. His observations were made in New York, while, as will be seen by 

 Abbot's stateuient, there are two broods of larva- in Georgia. 



Riley states that, according to W. W.Daniels, "When young the larvse feed in a phalanx, as 

 it were, lying parallel on the leaf and as close together as they can." His specimens occurred at 

 Woodstock (Missouri). September 10, on the burr oak {<J. macrocarpa), some lull-grown and otliers 

 just undergoing the third molt. "Entered the ground during the latter part of Septeiidier and 

 transformed to chrysalids, appearing as moths the foUownig April." (Fifth Rep. U. S. Ent. Comm., 

 p. 153). 



Food phiiilx. — Various species of oak; observed at Brunswick, Me., on the beech. 



jj, Geoyruphical dixtribvtion. — Common m the Appalachian 



and Austroriparian subprovinces. 



Ottawa, Canada (Fletcher); Oroiio, Me. (Fernald); Bruns- 

 wick, Me. (Packard); Massachusetts (Harris, Fernald); New 

 "i 01k (Lintuer, Beutenmiiller); Plattsburg, N. Y. (Hudson); 

 New Jersey (Packard Coll.); ^Missouri (Riley); Manhattan, 

 Kans., not rare (Popenoe); Racine, Wis., Chicago, 111. ( West- 

 cott); Chicago, 111. (Daniels); Ames, Iowa, "plentiful" (H. 

 Osborn); St. Anthony's Park, Minn, (Lugger); Georgia 

 (Abbot and Smith); Vermont, Wisconsin, New York, District 

 of Columbia, Virginia, Texas, Missouri (U. S. Nat. Mas.); 

 Maine, New Hampshire, Massachusetts, New Y'ork, New 

 Jersey, Wisconsin, Texas (French); Seekonk, Mass., Taun- 

 ton, Mass., Lawrence, Mass., Andover, Mass. (Mus. Comp. 

 „ „ „ , , » ., J ^ ,„- Zool.); New Jersey, Pennsylvania, Arkansas (Palm). 



ria. 73.— Pupa ot ronnd-toothed form (alhi. '' •" ■' ' ^ ' ^ 



jroM). timn Florida; lo, little black, irreguhu While iu Florida, iu April, I coUccted at Crescent City 



"■'"'*• on the live or water oak a fully grown caterpillar which I 



supposed to be Sijnimcrista albifrons. Bringing it to Providence in a tin box, it spun a well-defined, 

 quite dense cocoon between the leaves late in April, but the moth did not emerge until September 

 30. Although the summer was a warm one, and the room in which it was kept had a warm 

 exposure, the moth was evidently retarded iu its appearance by a change to a cooler climate. Unfor- 

 tunately, I did not make a description of the larva. It also occurs at Dallas, Tex. (Mus. Comp. Zool.). 

 This form is (dhlfrom A. and S., and (PI. IV, fig. 14) seems to represent a variety of this species. 

 It difieis from several specimens of <S'. (ilbicosta slightly but distinctly; it is smaller, and the white 

 costal band is a little shorter and broader; inside of the discal spot it is not oblique, but straight, 

 and the tooth bound'uKj the outer, routed aide of the discal spot is larger, rounder, and fuller, less 

 conical than in S. albicosta. The submargmal scallops are less curved, and the space in front of 

 the discal spot is filled in more densely with reddish brown. Expanse of wings, 35 mm. 



The pupa (fig. 71) differs in the cremaster being consolidated, not forked, and the seta' are 

 well developed. Length, IS mm. In a Providence pupa of albicosta, however, the cremaster is 

 partly consolidated, only forked at the end, and the six seta- are well developed. 



Mr. Dyar writes: "I have taken the form ,Symmerista albicosta in New Y'ork and Florida, the 

 typical albifrons also in New York, but much more rare (Poughkeepsie). But Professor Lintner, 

 at Albany, takes only albifrons.''^ 



