106 ILLINOIS BIOLOGICAL MONOGRAPHS [500 



PLATE XVIII 



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

 ican species belonging chiefly to the cuprascens and argentata 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). 



Explanation of Plate 



Figs. 422-4220, b, 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, graphiptcra Dej. (S. A.) ; 428-4280, after Chev- 

 rolot 428ft, 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, cupras- 

 cens Lee. (Illinois) ; 441 hamata Brll. (Mexico) ; 442, chlorocephala Chv. (Vera 

 Cruz, Mex.) ; 443, leucohoe Bat. (Mexico) ; 444, macronema did. (Mexico) ; 

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

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

 (Texas) ;' 451, calif omica praetexta Lee. (Texas); 452, marginata Fabr. (Texas); 

 •153", b, c, d, wapleri Lee. (Louisiana). 



