500 PROCEEDINGS OF THE NATIONAL MUSEUM vol. los 



Length of forewing, 22-30 mm. (average, 25.3 mm.). 



Female genitalia as illustrated (fig. 88), with anterior lobe of inner 

 genital plate having posterior margin smooth with its posterior free 

 angle produced and finger-like and wth ventral margin broadly 

 produced near middle. Plate opposite opening of ductus seminalis 

 very large and broad with the plate just anterior to this large and com- 

 pletely ringing the ductus bursae. The genitalia of eight females were 

 studied. 



Type locality: "Talcaguano"=Talcahuano, Province of Con- 

 cepcidn, ChUe. 



Additional type data: The sex and the number of specimens are 

 not given in the original description; however, the illustrations and 

 description apply only to the female. 



Location of iype: According to Horn and Kahle (Ent. Beih. 

 Berlin-Dahlem, vol. 2, p. 69, 1935) the material described from 

 Kotzebue's journey was shared in part by the "Museum Dorpat" 

 (Eesti Rahva Museum, Tartu, Esthonia), and in part by C. G. Man- 

 nerheim (material now in the Zoological Museum of Helsingf ors) . 



Method of identification: By comparison with the excellent, 

 colored, original figures of both surfaces of the female and the original 

 description. 



Synonymical notes: 



Pieris pobjdice Blanchard, 1852, described from both sexes (number of speci- 

 mens not indicated) taken in the vicinity of Concepci6n, Chile, is clearly a synonym 

 of T. mercedis. This type material, in the Museum National D'Historie Naturelle, 

 Paris, consists of one male (cotype) in bad condition, presented by Gay in 1843, 

 and two males and one female (cotypes) in good coridition, purchased from 

 Madame Lorquin in 1851. 



Tatochila mercedis ab. lilae Ureta, 1937. This was described from a single 

 female taken at Vicuna, Province of Coquimbo, Chile, in which the ground color 

 is yellowish with violet reflections. It is clearly an individual variant and is 

 therefore listed as a synonym. The type is in the collection of Dr. Emilio Ureta-R. 



Tatochila mercedis ab. porteri Ureta, 1937. This was described from a single 

 male taken at Santiago, Chile. It is an individual variant of the male sex in 

 which the maculation of the wings above to some extent resembles that of T. 

 vanvolxemii and in which nearly all black scaling along the veins underneath is 

 absent. Being an individual variant, it is here listed as a synonym. The holo- 

 type is in the collection of Dr. Emilio Ureta-R. 



Tatochila mercedis ab. elwesi Ureta, 1937, described from two females taken at 

 El Pangue, Department of Elqui, Province of Coquimbo, Chile, is an individual 

 variant of the female sex in which the ground color is bright yellow with a some- 

 what greenish tinge and in which nearly all black scaling along the veins below is 

 absent. The type is in the collection of Dr. Emilio Ureta-R. 



Misidentifications: Bartlett-Calvert (1886) refers to this species 

 under the name T. autodice (Hiibncr). Elwes (1903) illustrates a 

 female of this species as P. microdice Blanchard. 



