312 RHOPALOCERA. 
however, more produced, there are no white spots on the costa near the apex, beneath 
the wings have a more metallic sheen, and there are other slight differences which, 
taken with the difference of habitat, seem of some importance. 
This butterfly is included in our fauna on the strength of a single male specimen 
sent us by Mr. H. K. Morrison from the United States and Mexican frontier, between 
Southern Arizona and Northern Sonora. 
Mr. W. H. Edwards has given an interesting account of the relationships of the 
North-American butterflies of this form, showing that distinguishing characters between 
L. astyanaz (=L. ursula), L. proserpina, and even the white-banded L. artemis, cannot 
always be traced *. With these LZ. arizonensis will probably have to be placed, unless 
it be proved to have a definite area in which its distinctive characters though slight 
are fairly constant. 
CHLORIPPE. 
Chlorippe, Boisduval, Lép. Guat. p. 47 (1870). 
In this genus we place, with a few exceptions, the Neotropical species hitherto 
included by most writers in Apatura. The neuration of the primaries is much as in 
that genus, the subcostal emitting two branches before or at the end of the cell. 
The difference from Apatura consists in the shape of the front legs of the male, which 
have the tibia and tarsus flattened and divided into three longitudinal sections by two 
grooves running along each of these joints. These legs are always of a pale green 
colour, and this, too, seems to be characteristic ft. 
Chlorippe thus considered contains about twenty-three species, which are distributed 
over the Neotropical region, some, such as C. cyane, having a very wide range. 
There seem to be three sections at least of this genus, one represented by C. laure 
and C. cyaneé, the second by C. vacuna, and the third by C. zunilda, the two former 
having the same neuration and structure of front legs; in the latter the second sub- 
costal branch starts at the end of the cell and the joints of the legs are less flattened. 
The secondary male sexual organs in C. /awre have a tegumen with a central somewhat 
depressed spine, below which, in the anal cavity, is a strong slightly upturned central 
spine; the harpagones are hairy at the end and on the outer surface, but are without 
spines. In C. vacuna the tegumen is shorter and stouter, and the central piece below is 
also shorter and pointed downwards and not upwards; the sexual armature in C. zunilda 
is much as in C. lawre. “The palpi in Chlorippe vary in the length of the terminal joint, 
which is short in C. laure, not above one fifth the middle joint, which is slightly 
* ‘Butterflies of North America,’ second series, part viii. Limenitis I. 
T Messrs. Butler and Druce in noticing this genus of Boisduval’s speak as if the describer had said the 
palpi were green, and finding that they were not so, at once rejected the name Chlorippe. But it was the 
front legs and not the palpi which Boisduval rightly describes as green. 
