268 BULLETIN 44, UNITED STATES NATIONAL MUSEUM. 



C. album Harv.* 



1876. Harv., Can. Ent., vm, 35, Arsilonche. 

 1882. Grt., Can. Ent., xiv, 169, Copablepkaron. 



HABITAT. Oregon; Colorado; Montana. 

 The type is in the Edwards collection. 



Genus AEDOPHRON Led. 

 1857. Lederer, Noct. Europ., 180. 



A. pallens Tepper. 

 1882. Tepper. Trans. Am. Ent. Soc., x, 215, Aedophron. 



HABITAT. Southern California. 

 The type is in the Tepper collection. 



Genus THYREION Smith. 

 1891. Smith, Trans. Am. Ent. Soc., xvm, 121. 



T. snowi Grt. 



1875. Grt., Proc. Ac. Nat. Sei., Phil., 1875, 422, Aedophron. 



1876. Grt., Stett. Ent. Zeit., xxxvn, 137, Aedophron. 

 1882. Grt., 111. Essay, 65, pi. in, f. 37, Aedophron. 

 1X82. Smith, Trans. Am. Ent. Soc., x, 216, ? Aedophron. 

 1891. Smith, Trans. Am. Ent. Soc., xvm, 121, Tlnimon. 



HABITAT. Kansas. 



A specimen ( *? the type) is in the British Museum and agrees gener- 

 ically with the following species: 



T. rosea Smith. 

 1891. Smith, Trans. Am. Ent. Soc., xvm, 121, Thyreion. 



HABITAT. South Park, Colorado. 

 The type is with Mr. Neuinoegen. 



Genus CHLORIDEA Westw. 

 1841. Westw., in Jardine, N. H. Libr., xxxvn, 198. 



I use this generic term instead of uniting the two species with Heli- 

 othis, because, though very closely allied, they can be separated and an 

 overloading of the genus prevented. The only apparent difference is 

 in the wing form, their proportion to the body, and in the pattern of 



maculation. 



C. virescens Fabr.* 



1781. Fabr., Spec. Ins., n, 217, Noctua. 



1787. Fabr., Mant. Ins., n, 141, Noctua. 



1793. Fabr., Ent. Syst., in, 2, 30, Noctua larva. 



1811. Oliv., Enc. Meth., vm, 269, Noctua. 



1841. Westw., in Jardine N. H. Libr., 37, 199, pi. 24, f. 3, Chloridea. 



1852. Gn., Spec. Gen., Noct., n, 175, Axpila. 



1857. Wlk., C. B. Mus., Het., xi, 678, Chloridea. 



1868. H. Sch., Corr. Blatt, Cuba, p. 10, Chloridea. 



1880. Kiley, Am. Ent., in, 7, larva. 



