Species of the Genus Limenitis. 485 



contour of the more interrupted hind-wing band of this 

 species. 



Slightly increased resemblance to the Adelpha 

 pattern in the most southern examples of 



BREDOWI. 



In one respect the upper surface of the most southern 

 specimens of hredoioi, from Guatemala, appears to show the 

 influence o^ Adelj)ha raoxe. strongly than the more northern 

 examples from Mexico and Arizona. In both the southern 

 examples I have had the opportunity of studying there is 

 a small fourth spot in the fore-wing band (counting from the 

 costa), absent from the numerous more northern specimens 

 of hredoivi and calif ornica which I have seen. This small 

 spot is clearly shown, especially on the right side, in Plate 

 XXV, fig. 5. It is considerably larger in a second Guate- 

 malan specimen in the Hope Department. This feature 

 tends to make the fore-wing band more continuous than in 

 the specimens from further north. This spot is however 

 generally represented on the under surface of hrcdowi from 

 more northern parts of its range, and is often seen in the 

 same position in californica. 



Has reciprocal (Diaposematic) mimicry been estab- 

 lished BETWEEN CALIFORNICA AND LORQUINI ? 



There is only one apparent means of escape from the 

 conclusion that we are confronted with a striking example 

 of Diaposematic resemblance between those two species. 

 It may be held that californica possesses an ancestral pattern 

 from which hrcdowi in the south has been modified by 

 mimicry of the prevalent Adelphas. In certain respects this 

 interpretation is probably correct. Thus the form of the 

 wings in the female of the southern subspecies supports 

 the conclusion that their similar form in both sexes of tlie 

 northern subspecies is ancestral. But it would, I think, be 

 a curious coincidence if all the details by which the northern 

 californica differs from hrcdcnoi and superficially resembles 

 another species, should be ancestral survivals unconnecteH 

 with the presence of that other species — lorquini. 



Are we to regard the evident Adelplia-YikQ: elements in 

 the pattern of ccdifornica — only less strongly marked than 

 those of hrcdowi — as ancestral or as the result of mimetic 

 influence spreading with diminishing eft'ect beyond the 



