396 THE POPULAR SCIENCE MONTHLY 



while the male of P. urvilliana, a Solomon Islands species, is marked 

 with blue. The absence of red is noteworthy, 3 although it is not com- 

 plete, several of the species having a little red on the anterior edge of 

 the thorax or back of the head, or on the under side of the thorax. 

 In the allied tailed series (including such forms as P. hector and coon) 

 light red spots are frequently developed on the hind wings. The Amer- 

 ican (neotropical) Aristolochia Papilios, which are much smaller on 

 the average than the oriental, have the markings and form for the most 

 part much like the orange and black oriental group (P. darsius of 

 Ceylon, etc.), but where there is orange on the hind wings of the darsius 

 group, it is usually bright red in the neotropical series, though occa- 

 sionally orange, or orange shaded with red. Most of the American 

 species have well-defined patches on the anterior wings also, but these 

 are green, yellow, white or rarely blue, never red. American Papilios 

 of the lysithous group resemble the Aristolochia Papilios of the same 

 region in the most amazing way, and these mimetic butterflies are said 

 to usually imitate the sluggish flight of their models. When we have 

 figures of all these insects and their allies before us, we can see how 

 some of the most peculiar types are connected with quite ordinary ones 

 by intermediates, and how each group works on a certain series of avail- 

 able colors and patterns to reach its results. 



3 P. hypolitus Cr. (male) is figured as having red on the abdomen. This is 

 probably a mistake, as the description says dark yellow. 



