NATURAL SCIENCES OF PHILADELPHIA. 425 



even specimens before him, can hardly as yet correct European 

 lepidopterists, or affect the operation of a rule in zoological 

 nomenclature. 



Mamestra lubens, Grote. 



Mamestra rufula, || Morr. Proc. Acad. N. Sci. Phila. 1874, 62. 



The name here retained I have proposed in the Trans. Ent. Soc 

 Phila., in a paper issued prior to my receipt of Mr. Morrison's 

 pamphlet. I have not, at this writing, the complete data before 

 me, though, I believe, I have priority; the question is not mate- 

 rial, for I have employed the name previously for a Californian 

 species, Dianthcecia rufula; and the validity of Boisdunal's 

 genus is disputable since the discovery of American forms. The 

 absence of the tibial spinule is omitted in Mr. Morrison's com- 

 parison with the European brassicee. 



Parastichtis minuscula (Morr.). 



<?. A small species with the genital process extended. This 

 is, though not prominently visible, the remarkable character in this 

 genus with naked, lashless eyes, and unarmed tibia?. The present 

 species has apparently no tufts on thorax, and none on abdomen ; 

 neither of my two specimens are, however, perfectly fresh. The 

 colors are somewhat like meditata. Dark lilac gray ; terminal 

 space contrastingly paler. A faint reddish tinge about median 

 space. The claviform is indicated by a black dash, which extends 

 across the median space. The lines are faint ; t. p. line very 

 sinuous, narrowing the median space. Reniform upright, narrow, 

 concolorous; orbicular ovate, oblique. Hind wings blackish- 

 fuscous, with paler fringes. Beneath dark, subirrorate ; hind 

 wings paler at base ; a reduced discal dot and very obscure double 

 common lines. Thorax like fore wings. 



Expanse 23 mm. Orillia, Mr. Geo. Norman, Nos. 399, 401, 

 Sept. 9. 



There is a faint resemblance to finitima in this much smaller 

 species. 



Fala, n. g. 



A form allied by the conformation of the clypeus to Stibadium 

 and Plagiomimicus. The front is entirely cup-shaped, excavate, 

 raised rim-like around the edges ; from the centre a broad wedge- 

 shaped horn or prominence arises. Tibice unarmed ; fore tibire 

 with a terminal claw. Eyes naked, unlashed. Thorax untufted; 

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