SEASONAL POLYMORPHISM. 143 
the two species. The black marginal line is sharply defined, as in 4. 
thetis, though somewhat broader, but two of the specimens show traces 
of black spotting within, but detached from, the border of the fore- 
wings, and similar traces are discoverable with a lens in the other 
three, these spots are more definite on the hindwings, in varying 
degrees, but resemble those of thetis rather than those of coridon. The 
fringes are distinctly those of thetis. The underside resembles that of 
coridon in the difference of ground colour between the fore and hind- 
wings, but this difference is less marked than in specimens of coridon 
from Assisi. The spotting of the underside, except at the border is on 
the whole nearer to that of coridon, whilst the border is somewhat 
nearer to that of thetis, but the five specimens differ slightly in both 
these respects. The wings of all are decidedly nearer in shape to those 
of coridon. 
‘It must be remembered that of these five specimens three were 
taken on the slope above the cemetery road on June 28th and July 1st 
and 2nd, amongst numerous specimens of thetis, and the other two on 
July 19th and 24th on the road to Piano del Pieve amongst com- 
paratively few specimens of coridon, thetis then being quite over. The 
freshest specimens were those taken on July Ist and July 24th. I 
never saw thetis on the cuortdon ground nor vice-versa, but the two 
are scarcely half a mile apart. The dates of capture and the accom- 
panying species would seem to point to three of these specimens being 
aberrations of thetis, and two being aberrations of coridon, but as they 
are practically indistinguishable, I am still of opinion that probably 
all are hybrids. The date of capture of Dr. Verity's Geneva specimen 
seems to me to preclude the possibility of its being an aberration of 
coridon, and I have little doubt that all the specimens he mentions are 
actually hybrids, the differences between them being just what might 
be expected (judging from hybridism in other eases) on this 
supposition. Otherwise, the only plausible theory would seem to be 
that all are instances of atavism, in which gase three of my five Assisi 
specimens would actually have thetis as their immediate proprietors and 
the other two would be the direct offspring of coridon. This is no 
doubt a tenable theory, but the other seems to make a less demand on 
our credulity.—G. WHEELER. | 
Agriades thetis, Rott., race srrusca, Vrty., mixed gynandromorphs.— 
I must record the capture of two specimens last summer in Central 
lialy: one on June 10th in the Mainarde Mts. (Caserta), the other in 
August near Florence. In the first the right hindwing is quite female 
with large lunules ; the forewings and the left hindwing are a little 
smaller ; they have no premarginal lunules and they are streaked with 
bright blue male scales, including androconial ; the underside is 
entirely male. The second specimen may be described as a normal- 
looking female on both surfaces, but with abundant blue male scaling 
above, chiefly on right fore- and left hindwing, which is nearly 
entirely blue and has no lunules as far back as the median nervure 
and then abruptly becomes female beyond. 
Gynandromorphs are still raver in the South of Kurope than they 
are northwardly. O. Querci in 34 years, collecting on a large scale, 
has only met with a Celastrina aryiolus near Milan, now in the 
Rostagno coll. in Rome, and with a Plebeius aryus in the Sibillini 
