106 ILLIXOIS BIOLOGICAL MONOGRAPHS [500 



PLATE XVIII 



Figures 422-455. Showing the higlily specialized patterns of the South Amer- 

 ican species belonging chieflj' to the cnfrasccns and argciitata groups of species. 

 For meaning of letters see page 9. All the types have representatives in which 

 pigment has almost entirely disappeared as a rule and there is a strong tendency 

 for the area of the media trachea to degenerate along with the reduction of that 

 treachea (see figures 16 and 20). 



EXPLAN.'^TION OF PlATE 



Figs. 422-4220, h, C. apiata Dej. (S. A.) ; 423, apiata aber clausseni Putz. 

 (S. A.) ; 424, gormazi Reed. (Chili) ; 425, mixta Horn (Ecuador) ; 426, trifas- 

 ciata Fabr. (S. A.) ; 427-4270, b, graphiptera Dej. (S. A.) ; 428-4280, after Chev- 

 rolot 4286, patagonica subsp. cherubim Chvr. (S. A.) ; 430-4300, b, marginata Fabr. 

 (Texas) ; 431-4310, b, nivea Kirby (S. A.) ; 430-4320, gabbi G. Horn (California) ; 

 433, trisignata Dej. (Asia) ; 434, unidentified species from Arica, Peru, in the 

 Oxford University Museum ; 435, curvata Chvr. (Mexico) ; 436, dorsalis aber 

 saulcyi Guer. (Texas) ; 437-4370, b, c, dorsalis Say (Mass.) ; 438, malaris Horn 

 (Pebas, Amazons) ; 439-4390, ncvadica var. knausi Leng (Kansas') ; 440, ciipras- 

 cciis Lee. (Illinois) ; 441 hamata Brll. (Mexico) ; 442, chloroccphala Chv. (Vera 

 Cruz, Mex.) ; 443, leucohoe Bat. (Mexico) ; 444, macroncma Chd. (Mexico) ; 

 445. togata Laf. (Texas) ; 446, atiraria Klg. (S. A.) ; 447, boops (West Indies) ; 

 448, macronema Chd. (Mexico) ; 449, pamphila Lee. (Texas) ; 450, togata Lee. 

 (Texas) ; 451, californica praetexta Lee. (Texas) ; 452, marginata Fabr. (Texas) ; 

 453n, ''. c, d, 'cvapleri Lee. (Louisiana). 



