16 Grote and Robinson's LepiJopterohgical 



interspaceal clashes and with a whitish cinereous shade which obtains 

 principally over the apex. Fringes somewhat testaceous, dark at the 

 extremity of the nervules. Posterior wings whitish, with an arcuate, 

 median, paler band defined by its margins. Anal angle stained with 

 blackish; this color extending on the fringes at this place which else- 

 where are whitish. The wings are powdered with brownish scales 

 especially along the costa. Beneath : the primaries are generally dark 

 without definite markings, largely whitish along internal margin ; 

 costa powdered with pale cinereous scales; a subterminal, transverse, 

 pale, shade band. Secondaries, whitish, with scattered brownish scales 

 along costa; anal angle stained with blackish as on upper surface. 



Head and thoracic appendages clothed with pale mixed brown and 

 cinereous scales. Patagia, narrowly edged behind with dark scales; 

 metathoracic hairs, dark. Abdomen, whitish cinereous; on basal seg- 

 ment above, a few dark scales; terminal segment clothed with darker 

 scales and furnished with a bifid anal tuft. Legs and under thoracic 

 surface clothed with obscure purplish-brown scale. 



Exp. % 1.20 inch. Length of body 0.60 inch. 



Habitat. — Eastern States. 



Size of C unicornis, Pack. ; the apices of anterior wings are more 

 produced, costal nervules more curved, while the general coloration 

 and ornamentation will quickly distinguish this species from its asso- 

 ciates. 



ACRONYCTA, Ochsenheimer. 

 Acronycta occiden talis, n. sp. 



This species is the American analogue of the European Acronycta psi. 

 It constantly differs from its ally by the paler color of the primaries, 

 which are more sparsely covered with scales, and their somewhat squarer 

 shape. The reniform spot on the disc shows a bright testaceous tinge, 

 and the ordinary spots are less approximate than in A. psi. The secon- 

 daries are dark grey, nearly unicolorous, a little paler in the male, and 

 darker in either sex than in its European analogue. 



Exp. % and 9 , 1.40 inch. Length of body, % 0.60, 9 0.70 inch. 



Habitat. — Eastern and Middle States. Of common occurrence from 

 May to July. Toll. Ent. Soc. Phil. . 



This species is doubtfully regarded as identical with the European 

 A. psihy Messrs. Gruenee & Walker in their respective works on our 

 Noctuidae. The larval stages of our species have not been described 

 to our knowledge. This species has occurred quite plentifully to Mr. 

 Grote on the trunks of the elm trees in Boston Common. 



