(Ses) 
which occur throughout the family can only be fully seen by 
means of a longer series. The first two species, Psophus 
stridulus, Linn., from Savoy and an undetermined species 
from the United States show red hindwings, of which the 
colour does not vary to any great extent. The third species, 
(Hdipoda miniata, Pall., from Italy, has two forms, one, the 
.type-form, red wings as shown here, the other blue. The 
latter is due to a failure of the pigment and is therefore a 
form of albinism, as Brunner has suggested. ‘he first blue- 
winged species exhibited is the common ‘ langoute,’ or 
Uidipoda carulescens, Linn., which is normally blue. There 
is, however, a yellow form, var. sulfurescens, found in Algeria, 
of which a specimen is shown. It is a curious thing that this 
yellow form is never found in Europe, where the blue form is 
abundant; its existence is also due to a failure of pigmentation, 
produciug albinism, which here takes the form of an insipid 
yellow colour, whereas albinism in (. miniata converts the 
red colour into a blue. The synonymy of these two species 
is very confused as the different colour-varieties were regarded 
as distinct species. Later they were all united into a single 
species until Brunner in his ‘Prodromus der europaischen 
Orthopteren’ succeeded in separating them on structural 
characters. Together with the yellow form a fine species, 
(dipoda fuscocincta, Luc., of which a specimen is shown, is 
found in Algeria. 
“In Celes variabilis, Pall., of which I have no specimen 
here for exhibition, no less than three colour-varieties of the 
hindwings are found, red, blue (more or less faint) and quite 
colourless. The blue species from America affords a striking 
example of another variation that is common in the species of 
this group, in the position of the black band or fascia on the 
hindwings. This form of variation seems to be dependent on 
geographical circumstances. According to Brunner, in the 
specimens of (idipodide from the Northern Pyrenees and from 
the Jura and the Northern Alps, t.c., Alpine forms, the whole 
of the apex of the wings is black: in specimens from Central 
Europe the black band reaches the outside edge of the wing at 
the second sinus, wuile in the southern specimens, 7.e., from 
southern Dalmatia or Greec2, the band fizst reaches the edge 
