'"i89o!"'] PKQCEEDINGS OF THE NATIONAL MUSEUM, 427 



■with a yellowish sufiusiou. Eeniforni large, upright, centrally con- 

 stricted, black ringed, annulate, with white or yellow scales. Second- 

 aries fuscous or smoky, darkest outwardly ; a distinct discal lunule. 

 Beneath variable in shade, powdery, with variably distinct outer lines 

 and discal spots. 



Expands, 35 to 4:6 millimetres = 1.40 to 1.75 inches. 



Habitat. — United States and Canada. 



A common and widely distributed form, varying greatly in every 

 respect, and yet retaining a peculiar habitus that to the student 

 betrays the species at a glance. The eastern specimens are, as a rule,, 

 more sordid and more evenly gray, while specimens from the Pacific 

 slope show more contrast in color and the maculation is more sharply 

 defined. Occasionally a specimen is found that is blackish throughout 

 and leaves the lines visible by their paier included spaces ; and one 

 specimen before me is blackish, except for the median space. The 

 tuftings are not prominent, and the species shows a decided relation- 

 ship to the Lujjerina group of the genus. 



The bibliography is far from complete, all the economic references 



being omitted. The species is, in the larva state, one of the most 



common and destructive cut worms, and the life history has been 



written frequently. 



Xylophasia ezulis Lef. 



1836. Lef., Anu. Soc. Eut. Fr. v, 391, pi. 10, p, 1, Hadena. 

 1852. Gq., Sp. Gen. Noct. 1, 185, Crymodes. 

 1856. Wlk., C. B. Mua. Lep. Het. ix, 220, Crymodes. 

 gelata Lef. 



1836. Lef., Ann. Soc. Eut. Fr.v, 393, pi. 10, p. 30, Hadena. 

 1852. Gn., Sp. Gen. Noct. i, 1-^5, Crymodes. 



1856. Wlk.,C.B. Mu8. Lep. Het. IX,220 Crymodes. 



grcenlandica Zett. 

 1839. Zott. Ins. Lap. 939, Hadena. 



1845. H. Sch., Schuiett. Enr. ii, 274, 284, pi. 31, p. 151, PoUa. 

 1852. Gu., Sp. Gn. Noct. i, 185, Crymodes. 

 1856. Wlk., C. B. Mu8. Lep. Het. ix, 219, Crymodes. 



cervina Germ. 



1844. Germ., Fn. Ins. Eur, 22, No. 19. 

 viarmorata Zett. 



1839. Zett. Ins. Lap., 937, Hadena. 



1845. H. S., Schnietfc. Eur. ii, pi. 451, Polia. 

 1856. Wlk., C. B. Mu8. Lep. Het. ix, 220— poli. 



difflua Geyer. 



1837. Geyer, Zutr. Hub. Sara). Ex. 9, ff. 821, 822, Exarnis. 

 1871. Staud. Cat. Lep.,100=ex«H«. 



1881. Grt., Can. Ent. xiii, dl^exuUs. 



gelida Gn. 

 1852. Gn., Sp. Gn. Noct. i, 18G, pi. iv, p. 7, Crymodes. 

 1856. Wlk., C. B. Mua. Lep. Het. ix, 221, Crymodes. 



poli Gn. 

 1852. Gn., Sp Gen. Noct. i, 187, Crymodes. 

 1856. Wlk., C. B. Mas. Lep. Het. ix, 220, Crymodes. 



borea Gn. 

 1852. Gn.,Sp. Gen.Noct.1,136, Crymodes. 



