AMERICAN LEPIDOPTERA. 69 



ralists, but the fact is amply substantiated that no sufficient care or 

 judgment has been exercised by Mr. Walker in this matter. To illus- 

 trate : the female of our common Arctia nais (the variety with red 

 secondaries described by Saunders as Arctia dccnrata), figures three 

 times as a distinct genus and species, being twice regarded as new to 

 science under the names of Atoa colortita and Apanfexis radkms. 

 The genus Tonada, of which Mr. Walker remarks that it " is perhaps 

 as nearly allied to the Lifho.siidae as to the Lipari'ddc. and seems to 

 connect the two families," is founded on one of the Arcfiimic, the spe- 

 cies (^Tanada antica, Walk..) being nothing more than the common 

 albino form of Euchaetes egle (Drury) Hurn'x, described also by Dr. 

 Fitch &i>, Htjphantria colldris. A second species ( y^woJa ccmscita, 

 Walk..) is subsequently added to the genus, which in its turn is also 

 what may be regarded as an albino form, but one belonging to quite a 

 different genus, the specimen belonging to Callimorpha and being 

 C. vestalis, Pack., which we regard as an immaculate form of C. lecon- 

 tei, Boisd. A third species of this " genus " is a white Phalaenid, 

 certainly not belonging to the Bombycidae, apparently not North 

 American and otherwise unknown to us. A rubbed specimen of 

 Thyris maculata, Harris, is described as a new genus and species 

 under the name of Sayalassa perspicua, while specimens of the same 

 species are erroneously recorded as belonging to Thyris vitrina, Boisd. 

 The genus of Halesidota (Hdl'mdota., Hub iter. Yer.) of Mr. Walker 

 contains most dissonant material : Hal. maculuria, Walk., is Alpenus 

 aequalis, Walk., and from West Africa; Hal. megapyrrha, Walk., 

 and Hal. chri/sogaster, Walk., are identical and both the species now 

 known as Ammalo helops (CVam.,) though exactly what species is 

 intended by Cramer is not perhaps ascertained with certainty. On 

 the other hand Ammalo nantana. Walk., is a Zygaenid. Drijocampa 

 ruhicunda. Walk., is recorded from "Brazil," but this locality is erro- 

 neous ; the specimens belong to our common species and were actually 

 collected in the United States. This species is originally described 

 by Fabricius as being found in Virginia. In a " Supplement'' Mr. 

 Walker describes a Drijocampa veniista, from the United States and 

 distinctly regards it as a representative of, or nearly allied species to 

 his Brazilian Dry. ruhicunda, saying of it: ''The rosy costal stripe of 

 the fore wing distingaishes it from D. ruhicunda." Now were there 

 two closely allied species of Dryocampa , one of which the Bombyx 

 ruhicunda of Fabricius, found respectively in the United States and 

 Brazils as .stated by Mr. Walker, it is evident from an cxannnation of 



