48 ZOOLOGY. 
ment that “behind it at the base of the cilia is a fuscous streak’ 
showing that the “ apical spot” was not at the extreme apex. 
C. susinella, C. coffeella and C. albella are evidently very nearly 
allied, if they are not in fact different names for the same species. 
All of Mr. Mann’s figures in his last plate will answer for some 
specimen of albella, especially the figure of the cocoon. The 
mode of pupation is the same, and I have been able to detect 
no differences in the larvæ. C. albella and C. susinella mine the 
leaves of poplars, and albella also mines those of willows ; whether 
susinella does is not ascertained. The identity of the food plant, 
and the close similarity of the insects, raise a strong presumption 
that they are the same species. But albella has the tuft on the 
vertex as distinct as it is in cofella, whilst Mr. Stainton says that 
C. scitella was (when he wrote) the only European species which 
kas such a tuft, and if so, then susinella must be distinct from 
both albella and coffeella. But Mr. Stainton’s note upon susinella 
is very brief and he does not pretend to give an accurate or 
detailed description of it. Besides, it has not yet been found in 
England, and Mr. Stainton’s specimens must have come from 
Europe, and therefore may be a little worn, and the tuft is very 
easily obliterated. Mr. Stainton’s brief note, then, scarcely affords 
sufficient data for a comparison with other species. He says that 
susinella has two fuscous streaks pointing upwards in the cilia, 
represented, as I infer, by the last two streaks in Mr. Mann’s 
figure ; and susinella and coffeella therefore do not differ in this 
~ respect; but in albella the first of these last two streaks, that 
ao immediately behind the ‘‘ apical spot,” is only fuscous at the costa 
and the remainder of it is pale golden. The outer fuscous stalk is 
- in albella by the fuscous spot at the apex, and with the 
4 cilia expanded as in flight this spot would become a streak. In 
_ coffeella the spot is partly surrounded (on the sides towards the 
_ base and towards the costa) with pale golden. Mr. Stainton does 
not mention this golden margin, but he says that the first (golden) 
costal streak is continued to the anal angle (where the spot is), 
_and if so, it must partly surround the spot. Mr. Mann represents 
confluent with its golden margin. My description of albella was 
drawn up from four specimens in which I failed to detect the 
ence of the golden margin around the spot thus differing from 
j ee e wher the paaa costal streaks did not attain the 
tr Sh a ia ea i ag Pe h 
RRN pies 
eae in ath Sac: Goel 
the two golden costal streaks as not attaining the spot, and not 
