150 BULLETIN 44, UNITED STATES NATIONAL MUSEUM. 



O. chalcedonia Him.* 



1815. Hbn., Enr. Scbmett., Noct., 404, Oligia. 



1816. Treit., Schmett. Eur., i, 74, Bryophila. 

 1852. On., Spec. Gen., Noct., I, 221, Celcena. 



1856. Wlk., C. B. Mus., Het., x, 262, Celcena. 

 1891. Butler, Entomologist, xxiv, 240, Mamcstra. 



vincta Wlk. 



1857. Wlk., C. B. Mus., Het., xn, 730, Miana. 

 1882. Grt., 111. Essay, 44, pr. syn. 



1891. Butler, Entomologist, xxiv, 240, pr. syu. 



irresoluta Wlk. 



1857. Wlk., C. B. Mus., Het., xn, 731, ? Celcena. 

 1882. Grt., 111. Essay, 45, pr. syn. 

 1891. Butler, Entomologist, xxiv, 240, pr. syn. 



am a Gn. 



1852. Gn., Spec. Gen., Noct., i, 222, Celtr.na. 

 1856. Wlk., C. B. Mus., Het., x, 262, Celcena. 

 1875. Harv., Bull. Buff. Soc. Nat. Sci., in, 7, Oligia. 

 1889. Smith, Eut. Arner., v, 148, pr. syn. 



tracta Grt. 



1874. Grt., Proc. Ac. Nat. Sci. Phil., 1874. 204, pr. var. 



1875. Harv., Bull. Buff. Soc. Nat. Sci., in, 7, pr. syn. 

 1881. Grt., Bull. Geol. Surv., vi, 261, an var. pr. 

 1889. Smith, Ent. Arner., v, 148, pr. syn. 



1891. Butler, Entomologist, xxiv, 240, pr. syn. 



HABITAT. Canada in June; New York in June; Maryland; Florida, 

 Texas, March, April, and August; Colorado; New Mexico; Alabama 

 in November. 



The Walker and Grote types are in the British Museum; Guene"e's 

 type is from the Doubled ay material and should be there also; but I 

 did not see it. 



I can not quite see why Mr. Butler refers chalcedonia to Mamestra 

 an&festivoiflcs to Oligia. The two are surely closely enough related to 

 be congeneric. 



O. versicolor Grt.* 



1874. Grt., Proc. Ac. Nat. Sci. Phil., 1874, 204, Oligia. 



1875. Grt., Can. Ent., vii, pi. I, f. 11, Oligia. 



HABITAT. Ontario in June; northern New York. 

 The species is in the British Museum, but apparently not the type 

 specimen. Mr. Van Duzee has sent me the species from Buffalo. 



O. exesa Gn.* 



1852. Gn., Spec. Gen,, Noct., I, 222, Celcena. 

 1856. Wlk., C.B.Mus., Het., x, 262, Celcena. 

 1881. Grt., Bull. Geol. Surv., vi, 265, Oligia. 



floridiana Wlk. 



1865. Wlk., C. B. Mus., Het., xxxin, 730, Hadena. 

 1891. Butler, Entomologist, xxiv, 241, pr. syu. 



HABITAT. Florida in March. 



The types are in the British Museum, and Mr. Butler's reference is 

 correct. 



