50 BULLETIN U, UNITED STATES NATIONAL MUSEUM. 



Genus CYATHISSA Grt. 

 1881. Grt., Bull. Geol. Surv., vr, 576. 



C. percara Morr. * 



1874. Morr., Proc. Bost. Soc. N. H., xvir, 213, BrijopMla. 



1875. Grt., Proc. Bost. Soc. N. H., xviir, 414 BrijopUla. 

 1875. Grt., Bnl]. BufF. Soc. Nat. Sci., ii, 308, Jaspidea. 

 1881. Grt., Bull. Geol. Siirv,, vi, 576, Cijatkissa. 



Habitat. — Florida; Texas, March to May and September; Colo- 

 rado. 



The type is probably at Cambridge; but I have no memoraudum of 

 having seen it there. 



Genus CHYTONIX Grt. 

 1874. Grt., Bull. Buff. Soc. Nat. Sci., u, 06. 



C. palliatriciila Gn.* 



1852. Gn., Spec. Gen., Noct., r, 26, Bryopldla. 

 1856. Wlk., C. B. Mus., Het., ix, 26, Bryophila. 

 1874. Grt., Bull. Buff. Soc. Nat. Sci., ii, 66, Chytonix. 

 1877. Grt., Can.Ent., ix, 196, Chijtonix. 

 1883. Grt., Proc. Am. Pliil. Soc, xxi, 155, Bryophila. 



iaspis Gn. 

 1852. Gn., Spec. Gen., Noct., i, 209, Apamea. 

 1856. Wlk., C. B. Mus., Het., ix, 250, Apamea. 

 1874. Grt., Bull. Buff. Soc. Nat. Sci., ir, 66, Chytonix. 



1881. Grt., Papilio, i, 49, ? pr. syn. 



1882. Grt., New List, 23, pr. syn. 



Habitat. — Canada, May and June, to Virginia; Illinois; Minnesota; 

 New York and Massachusetts in Jnly; North Carolina in August. 



Guenee's types are in the British Museum. In palliatrictila the me- 

 dian space is largely white, else I see no difference. This is a variable 

 feature in the species and is not sexual. 



C. sensilis Grt.* 



1881. Grt., Papilio, i, 49, Chytonix. 



1882. Grt., 111. Essay, 51, pi. i, f. 6, Chytonix. 



Habitat. — Massachusetts; New York; New Jersey. 



The type is in the British Museum. Tiie white spot in the median 

 streak is a variable character. I have a compared specimen exactly 

 like the type except in that respect. A typical specimen is in Dr. 

 Thaxter's collection. 



AGROTIS Auct. 



The species classed under the above generic term have been mono- 

 grai)hically treated by me in Bulletin No. 38 of the United States Na- 

 tional Museum, Washington, 1890, and in accordance with this revision, 

 the collections in the Museum are arranged. I have carefully com- 

 pared all the types in the European Museums with the characteristics 



