192 Forty-second Report on the State Museum. [50] 



remarks made on page 188 on an apparent habit of the larva of 

 inclosing itself in its cocoon prematurely, under certain conditions. 

 Examples sent to me by mail, and, of course, subjected to unnatural 

 treatment in their boxing, etc., have made their cocoons as early as in 

 August. My notes — all the dates bearing on this point that I have — 

 show the following, which will be seen to be quite in contrast with 

 Miss Morton's experience with her carefully matured larvae : 



Larva, August 4, on pear; cocoon made August 6. 



Larva, August 22, on apple; cocoon made August 24. 



Larva, September 2, on hazel; cocoon made September 16. 



Larva, September 3, on pear (fruit) ; cocoon made September 5. 



Larva, September 4, on crab-apple; cocoon made September 7. 



Larva, September 9, on pear; cocoon made September 12. 



Parasites. 



Miss Morton has sent me a Tachina ny which she has bred from 

 pithecium which I can not separate from unnamed examples in my 

 collection, marked " bred from Limacodes sp ?" The slug caterpillars 

 are apparently very liable to Tachina attack. Miss Morton feelingly 

 remarks, in writing of the example sent: "It looks to me like all the 

 grey Dipterse infesting the Limacodes which so often render a sum- 

 mer's hard work abortive by their emergence from the empty skin, of 

 the mature larva just as it is about to form its cocoon." 



Anisota senatoria (Sm.-Abb.). 



The Yellow-striped Oak Caterpillar : The Senatorial Oak Moth. 



(Ord. Lepidoptera : Fam. Bombychxze.) 



Smith-Abbot: Lepidop. Ins. Geo., ii, 1797, p. 113, pi. 57 (larva, pupa, g & 



imago). As Phalcsna. 

 Hubner: Verz. Schmett., 1816, p. 193, No. 1979 fas Anisota). 

 Harris : An.-Pl. Mass., 1835, p. 72; Kept. Ins. Mass., 1841, p. 292; Ins. New 



Eng., 1852, p. 312; Ins. Inj. Yeg., 1862, p. 405-6, f. 198 (larva), 199 



(pupa), 200 (Q imago); Entomolog. Corr., 1869, p. 298, pi. 2, f. 9 



(larva), pi. 4, f. 12 (pupa). As Dryocampa. 

 Walker: Cat. Lep. Brit. Mus., 1855, Pt. VI. 

 Fitch : 5th Kept. Ins. N. Y. (3d. -5th Repts.), 1859, p. 43. 

 Morris : Synop. Lep. N. Amer., 1862, p. 231. 



Packard : in Proc. Ent. Soc. Phila., iii, 1864, p. 385 ; in Bull. No. 7, U. S. Ent. 



Comm., 1881, p. 45 (habits, etc.). 

 Grote: in Proc. Ent. Soc. Phila., iii. 1864, p. 93 (restores Anisota Hubner); 



in Proc. Amer. Philosoph. Soc, xiv, 1874, p. 260 (place in classif.). 

 Walsh: in Pract. Entomol., ii, 1866, p. 7 (in Wisconsin). 

 Glover : in Rept. Comm. Agricul. for 1870, p. 83, f. 43 (larva). 



