SN 
4 THE ENTOMOLOGIST S' RECORD. 
or races, but species, it must be done with practically no support from 
the structure of the male appendages. 
Plate I. (VI. in Etudes), fig. 1 shows the whole of the male appen- 
dages of Plebeius argus X 80 diameter. Fig. 2, the dorsal armature 
x 45, and fig. 3, the end of theclasp x 90. These can be compared 
with the appendages of Plebetus ligurica. 
In Plate II. (VII. of Etudes) I have reproduced three examples of 
ligurica xX 80, as being a new species it seemed desirable to show that 
its differences from argus are constant, as is illustrated by my other 
preparations. These differences are seen in the dorsal armature, of 
which the lateral portions are longer, larger, and of different form, 
more easily seized is perhaps the form of the falces, which have the ter- 
minal straight portion longer, straighter, and narrower than in argus. 
The ends of the clasps that carry the teeth are practically without the 
angle below the end, and the teeth are smaller, etc. The edeagus, as 
Dr. Reverdin notes, is rather larger than in argus. The three speci- 
mens are from different points in the Geneva locality. 
In Plate III. (IX. in Etudes) are shown, x 80, the appendages of 
the American Plebeius melissa, figs. 7 and 8, and the Hastern Asiatic 
P. micrargus, fig. 9. These are both much more like ligurica than 
argus, but there appears to be sufficient difference in the appendages to 
show that they are distinct specifically from it, and from each other. 
I have no desire to pronounce strongly on this point, as my material 
was not abundant, though I examined a good many of each form. 
I have, however, little doubt that melissa from California and from 
Toronto are specifically identical. My specimens, supposed to be scud- 
deri, were identical with melissa, so I think that I have not had speci- 
mens of the true scudderi. Specimens of micrargus from Amoor, China, 
and Japan, were (so far as appendages showed) all one species, though 
those from each locality appear to have received separate names to 
the extent of nearly a.score. Most of these I have not examined, but 
from their facies and the intermediate position of their localities I have 
little doubt I am correct in calling them all micrargus, which seems to 
be the oldest name. : 
In Plate IV. (XII. in Etudes) are shown the appendages of a species, 
of which specimens were given me by Mr. A. H. Jones and Mr. W. G. 
Sheldon. Fig. 10, the whole appendages, x 30; Fig. 11, the dorsal 
armature, X 45; and fig. 12, the end of the clasp, x 90. It will be 
seen that these are quite distinct from any of the other species so far 
considered, but perhaps nearest to melissa, the American species. The 
straight portion of the falces looks very long, being straight and slender, 
and the end of the clasp is very short, broad and straight. In the 
Etudes I give the exact measurements of some of these points of diffe- 
rence. That a form most nearly related to melissa should occur in 
extreme Eastern Europe is remarkable, of course the area of its habitat, 
of which only Sarepta has (so far as 1 know) ‘been sampled, remains 
unknown, but is probably considerable, possibly a large part of the 
basin of the Volga, from various parts of which avgus has been recorded. 
These records may really refer to argus, but possibly belong to sarep- 
tensis, a name to which this new species seems to be entitled. 
Plate VI. (XX. in Etudes) shows, in characteristic examples photo- 
graphed by Mr. Tonge, the differences that may almost always be 
