24 . NOTES ON SOME SPECIES. 



The authors fell into the same error with regard to Arctia Partheiios, Harris, and Arctia 

 Borealis, Moschler, which are likewise synonyms, Harris' name being much the older; this 

 can easily be seen by comparing examples of Parthenos with fig. 3 on plate 9 of Vol. IV., 

 AVein. Ent. jNIonat. 



Eresia Sydra, Reak. Proc. Acad. Nat, Sc., Phil., 186G, p. .33.j, n. 36, is Eresia Acesas, 

 Hew. 1. c. f. 48. 49. 1864. 



Arctia Americana, Arctia Caja. I never had much faith in tiic genuineness of Harris' 

 Arctia Americana, but before I had given the matter much attention I thought the white col- 

 lar would seem to be entitled to some value as a specific distinction. Dr. Harris who described 

 A. Americana says: "This moth closely resembles the European Caja, and especially some of 

 its varieties, from all of which however it is essentially distinguished by the white edging of 

 the collar and shoulder covers and the absence of black lines on the sides of the body." As 

 far as the examples of Americana and Caja in my possession go, the above amounts to nothing ; 

 four examples of Caja are before mc ; the first, from Saxony, expands 2^~ inches, has the collar 

 edged with red, patagife narrou-Jy edged with white on outer edge ; five brown spots on side of 

 abdomen and five on back. 



The second, from Osterode-am-Harz, expands 2J- inches, has collar edged with red, no 

 W'hite whatever on patngiw ; no marks of any 7:ind on sides of abdomen, four black spots on 

 back ; the blue spots on secondaries of this exam^ile are very small, with the exception of two 

 near the exterior margin ; they are little .more than dots. 



No. 3, from England, expands 2| inches, has /ron^ edge of collar and outer edge of patagia- 

 white; five very small black spots on side -of abdomen and four large ones on back. Primaries 

 of this example have the brown markings very narrow; there is as much white as brown. 



No. 4, from S, France, expands 2§ inches, front edge of collar red, outer edge of patagiw 

 narrowly lohite ; abdomen, except the segment nearest the thorax, black above, on sides and 

 below, a little red on sides, hair on sides of anal segment red ; in this specimen the primaries 

 are very dark brown with but little white ; secondaries very dark orange with spots of un- 

 usuall}- large size, those nearest the base confluent forming a band. 



Of my examples from British America, the one expands 2| inches ; collar and outer 

 edge of patagia; white ; no spots on sides of abdomen ; six black spots on back ; primaries 

 with but little white ; secondaries have four very large sjiots, three sub-mai'ginal and the 

 other half way between these and the base. 



The other example expands 2| inches, has collar white ; outer edge of patagia" narrowly 

 white ; faint indications of five spots on sides and five black sjiots on back of abdomen ; 

 brown and white of primaries in same proportion as in ordinary forms of Caja ; spots on 

 secondaries likewise, 



I wrote to Mr. Moschler in Germany, concerning Caja and Americana, he says in reply 

 " In my collection are 16 Arct. Caja from here* 3 examples have distinct tvhite collars exactly 

 like my cxam])les from N. America, Caja and Americana are surely one species. " And I 

 must say that I agree with his conclusion. 



*Germanv. 



