Explanation of Figures 16-18b 



The uppersurfaces are shown on the left and the undersurfaces on the 

 right in figures I6b-18. Only the uppersurfaces are shown in figures 16, 

 16a, 18a, and 18b. 



Fig. 16. — Tatochila vanvolxemii (Capronnier); a male form apparently 



somewhat intermediate to T. microdice 7)iacrodice, from Rio Colorado, 



Territory of Rio Negro, Argentina. 

 Fig. 16a. — T. vanvolxemii (Capronnier); a lightly marked female form 



from Rio Colorado, Territory of Rio Negro, Argentina. 

 Fig. 16b. — T. vanvolxemii (Capronnier); typical female form, from 



Bolivar, Province of Buenos Aires, Argentina. 

 Fig. 17. — T. mercedis (Eschscholtz); an aberrant, nearly immaculate, 



male form from Romeral, Province of Santiago, Chile. 

 Fig. 17a. — T. mercedis (Eschscholtz); a lightly marked male form from 



Lo Ovalle, Province of Santiago, Chile. 

 Fig. 17b. — T. mercedis (Eschscholtz); typical male form, from Alacul, 



Province of Santiago, Chile. 

 Fig. 17c. — T. mercedis (Eschscholtz); a heavily marked male from 



Frutillar, Province of Llanquihue, Chile. 

 Fig. 18. — T. mercedis (Eschscholtz); a heavily marked female from the 



same locality. 

 Fig. 18a. — T. mercedis (Eschscholtz); a lightly marked female form 



from Santiago, Province of Santiago, Chile. 

 Fig. 18b. — T. mercedis (Eschscholtz); typical female form from Alacul. 



Province of Santiago. Chile. 



