182 



MEMOIRS OF THE NATIONAL ACADEMY OF SCIENCES. 



wiugtbe 18th of February. Others s]mu on the l'!»th of March, and eaiiie <iut on the 2cl of May. 

 The wliole brood feeds tojictlier. especially wlien small." 



.Mr. James Fletcher rejiorts that in LSS-l the caterpillars apiieared in j;reat numbers and were 

 most injurious to both oaks and nui))les at Ottawa, Canada. (Kej)., 31.'.) 



It IS eoninioii ou white oaks in lihode Island and Maine late in Anyust and through SejittMnber, 

 those observed at Providence sijinninj;' a thin coeoidi between the leaves early in October and until 

 October 20-28. October o I found some small lar\ ie (probably next to the last stage) with the 

 strijjes straw yellow instead of oranue. The moth api)eais in June in the northern States. 



Mr. Beuteuniiiller pul)lishes the following notes on its transformations: ''The eggs from which 

 my observations Avere made were laid ou June 1!», and the >'oung larvae emerged on July 2. The 

 first molt took ])lace ou July 9, the .second molt on July 17. the third molt ou July 24, the fourth 

 on July .'HO, and the last molt ou An.gust -1. The larv;t were fully grown on August 12." He adds 

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

 Abbot's statement, there are two broods of larviv in Georgia. 



IMley states that, according to W.W.Daniels, "When young the larviP feed in a jihalaiix, as 

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

 Woodstock (Missouri). September 10, on the burr oak (V- '«"f'''owu7>rt), some lull-grown and others 

 jn.st undergoing the third molt. '-Entered the ground during the latter part of September and 

 transformed to clirysalids, appearing as moths the following April." (Fifth liep. U. S. Eut. Comm., 

 p. 153). 



Food plants. — Yarious sjiecies of oak; observed at Brunswick, Me., on the beech. 



^ Geofirapliicul (lixtriliution. — Common in tlie Appalacliiau 



and Austroripariau subprovmces. 



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

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

 "\ ork (Lintuer. Beuteuniiiller); I'lattsburg, N. Y. (Hudson); 

 New Jersey (Packard Coll.); Missouri (Hiley); Mauhattau, 

 Kans., not rare (Popenoe); Itacine, Wis., Chit-ago, 111. (West- 

 cott); Chicago, 111. (Daniels); Ames, Iowa, '■plentiful" (II. 

 O.sborn); St. Anthony's Bark, Minn. (Lugger); Georgia 

 (Abbot and Smith); Yermont, VViscoiisiu,New York, District 

 <if Columbia, Yiiginia, Texas, ^lissouri (C S. Nat. Mas.); 

 Maine, New Hampshire, Massachusetts, New York, New 

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

 ton, Mass., Lawrence, iMass., Audover, JMass. (Mus. Comp. 



Fig. 7:f.— I'upa of rourid-toothod form (albi- 

 fyons), from Florida; (c, little black, irre»;ular 

 warts. 



Zool.); New^ Jersey, Pennsylvania, Arkansas (Palm) 



While in Florida, in April, I collected at Crescent City 

 on the live or water oak a fully grown caterpillar which I 

 supposed to be Siimmrrisia alhifrons. 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 uot 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 evi<lently retarded in its appearance by a change to a cooler climate. Unfor- 

 tunately, 1 did not make a description of the larva. It also occurs at Dallas, Tex. (^Mus.Comi). Zool.). 

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

 It differs from several specimens of S. alhicostK 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 obliipie, but straight, 

 and the tooth bounding the outer, costal .side of the disi/nl spot is Uu-fjer. founder, and fuller, less 

 conical than in tS. nlhicosta. The submarginal scallops are less curved, and the space iu front of 

 the discal spot is lilled in more densely wiili reddish brown. Expanse of wings, 3.5 mm. 



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

 well develojied. Length, 18 mm. In a Providence pupa of albieosta, however, the cremaster is 

 partly con.solidated, only forked at the end, and the six setic are well developed. 



Mr. Dyar writes: "I have taken the fmiu S)/mmerista albieosta iu New Y'ork and Florida, the 

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

 at Albany, takes only albifrons.'' 



