412 [NOVEMBKR 



the field. The systeniatist who in his closet receives specimens from 

 the four quarters of the globe, and busies himself in arranging and 

 classifying them, can discover nothing here, or if he does he must be 

 dependent entirely upon the accuracy of out-door observers. My pre- 

 sent object, however, is not so much to adduce new proofs upon this 

 subject, as, in the light of ray subsequent experience, to correct, modify 

 and enlarge upon those proofs which I have already adduced in a Paper 

 published in the Proceedings of the Boston Society of Natural His- 

 tory, Feb. 1864. In the following paragraphs I shall refer to that 

 paper by the page. 



Halesidota (lophocampa) Antipuola Walsh, (pp. 288 — 290.) 

 I have shown here that the imago of//, tessellaria Sm. Abb., the larva 

 of which feeds only on the sycamore, is absolutely undistinguishable 

 from that of //. Antiphola, the larva of which feeds on the oak, the 

 basswood and several other trees. But from trusting to a description 

 drawn up some years ago, which I found in my Journal, one of the 

 characters which distinguish the two larvae is incorrectly stated. The 

 black pencils on the thorax of the larva of Antiphola are in reality 

 placed upon the same segments as the orange-colored pencils of tessd- 

 laris, viz. on the 2nd and 3rd, and not on the 1st and 2nd segments, as 

 I have erroneously asserted; but they are invariably black, and those 

 of tesse/laris invariably orange-colored. The general color of the hair 

 of Antipliola varies, as I have stated, " from dirty whitish to fuscous 

 cinereous, and from ochre-yellowish to pale yellowish brown," all these 

 varieties occurring on the same tree, the oak, and the same individual 

 often changing its color in confinement. But I have this year met with 

 a single specimen that was almost pure white, and two others that were 

 straw-colored or pale gamboge-yellow ; and the one that was nearly white 

 changed its color in confinement in a single day to pale gamboge-yellow- 

 ish. On the other hand the general color of the hair of all tessellaris that 

 I have seen, some hundreds in number, was milk-white, though Dr. 

 Harris describes them as '• light-yellow or straw-colored." (/y". Ins. p. 

 3(33.) Mr. Edwards also, to whose experience I had appealed on this 

 point, says that " he knows the larva of H. tessellaris very well, and 

 that to the best of his recollection they are white, though he would not 

 like to assert positively that they had not a j^ellowish tinge." And 

 Mr. J. A. Lintner writes me word that "he has frequently noticed 



