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ON NORTH AMERICAN SPECIES OF PLUSIA

Published online by Cambridge University Press:  31 May 2012

A. R. Grote
A. R. Grote
Affiliation:
Buffalo, N. Y.
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Extract

Allied to precationis and ,gamma. It differs by the distinct yellow shaded geminate t. p. line having but a single acute tooth at vein 2 ; the line running more outwardly at this point, and being othewise even throughout. Also by the shape of the metallic spot ; this is open, silver bordered, running outwardly obliquely from the median vein to the t. p. line at vein 2, sub-triangulate, the bordering lines fusing outwardly to a point, forming an oblique uneven V. The median space below and beyond the metallic mark is shaded longitudinally with obscure chalceous.

Type
Articles
Information
The Canadian Entomologist , Volume 7 , Issue 11 , November 1875 , pp. 202 - 205
Copyright
Copyright © Entomological Society of Canada 1875

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References

* This species seems to vary in color; one specimen is very like festucae in this respect. A character is offered by the t. p. line, which runs inwardly to a point below the discal dlot in festucae, and allows of an extension of the silvering within this tooth. In Putnami this sinus is rounded and shallower.

** Unknown to me since 1866, when I described the species and at once returned the type to my friend Mr. Treat; I indicated at the time the structural difference in the length of ihe palpi. Both this species and thyatiroides are apparently mimetic of the Bombyciæ.

*** Contrary to Mr. Morrison's supposition, I regard this as a valid species, differing specifically from the larger P. ou, taken by myself in Alabama. The t. p. line is straighter, the dot of the metal mark is separate, the size is uniformly smaller.

**** Dr. Speyer regards this species as valid on new characters; a Californian specimen does not differ from my Eastern material.