100 



897. 



898. 

 899. 



pygmaea Hbn.*) Southeru States; New Mexico. 



fuscescens Wlk. 



abrostella Wlk. 



praepilata Grt, 

 flabella Grt. Kansas, 



oculatrix Gn. Canada to Southeru States. 



Trib. Anomiini. 

 Gen. Anoniis Hbu. 1818. 



Type: A. 

 erosa Hbn. 

 exacta Hbu. 

 texana Riley. 

 902. luridula Gn. 



derogata Wlk. 

 conducta Wlk. 

 hostia Harv. 



Gen. Aletia 



Type: A. 



argillacea Hbn.**) 



900. 

 901. 



903. 



904. 



erosa. 



Eastern to Southern States. 

 Southern States. 



Gulf States: West Indies. 



Texas; Mexico southwardly. 



Hbn. 1818. 

 argillacea. 



905. 



South Am.; West Ind.; Migratory 

 to Canada. 

 xylina Say. (Noctua.) 

 grandipuncta Gn. (Anomis.) 

 bipunctina Gn. (Anomis.) 



Gen. Pteraetholix Grote 1873. 

 Type: P. bullula. 

 bullula Grt. Southern States. 



*) A renewed study of Hiibner's figure makes it certain that the iasect 

 is an Ingura; and so highly probable that it is intended for my praepilata 

 that I venture to rest »re the name. 



**j The 60-called "Cotton Worm", which destroys the foliage of ihe 

 Cotton Plant. In 1874 I read an original paper before the American Asso- 

 ciation in which I showed that the insect is migratory, does not bclong 

 properly to the N(jrth American Fauna, but comes to us every year from the 

 ßouth. It obtained an extensive field for existence within the political limits 

 of the United States with the cultivation of cotton in the Southern States at 

 the dose of the last Century, previous to which it had devasted the |)lan- 

 tatioiis in Martinique. I showed that it was winter-killed over most of the 

 North Ami'-rican territory over which it flies and suggested for the Department 

 of Agriculturc the ascertuiiiing of the zone of permanent occupation, if such 

 Zone exists with us. Tliis may rougliiy coirespoml with the tropical region 

 of Le Conte's faunal map. No alternative fnod plant for the Cotton worm 

 in the North or South is yet discovered. Mr. C. V. Riley first treated the 

 insect as indigenous (Missouri Reports): next be improi)erly criticized my 

 observations: now he seems to claini them as his dwti. The sight of an 

 Alabama |)lantation füll of the disclosing chrysalids of the first brood, sud- 

 denly in Ihree or four days free; from the moths which had all wandered 

 nortliward, confirmcd me in my theory. See Proc. Am. Ass. 1874: State 

 Reports of Alabama: 111. Essay pp. 18 et seq.: Verhandl. Gesell. Nat. Acrzte, 

 Bremen, I8'J0. The North American Fauna consist of three Clements, 

 descendants from a prtiglacial circumpolar fauna, an indigenous survival, a 

 yearlv immigration from tropical America which in part has secured a foot 

 hold.' 



