Species of Lithocolletis. c]xxiii 
apex to the angle formed by the opposite spots; there are a few dark 
scales on its margin, but no oval black spot. 
Tristrigella frequents elms, in May and August. I once bred it. 
Nicellii is very closely allied to Frélichiella, but is smaller, paler, 
with much sharper and brighter markings, and the black scales to- 
wards the apex more collected into an oval spot. 
I have not yet succeeded in detecting the larva, and am not aware 
that the species occurs with us at all. 
13. L. lautella. The larva is an oak-feeder, and the pupa is in- 
closed in an extremely fine elongated cocoon. 
14, L. ulminella, (Schreberella). The ordinary cocoon of the pupa 
is green or bluish green. In July, however, I found two transparent 
white cocoons in elm-leaves, from which I bred only Schreberella. 
In conclusion, I have only to observe that the species here enume- 
rated by Von Nicelli, are identical with those bearing the same names 
in Zeller’s Monograph in the ‘ Linnea,’ as I have been assured by 
Herr Zeller himself. 
H. T. Stainton. 
September 1, 1851. 
P.S.— Having now enumerated all the additional observations I had collected on 
the species mentioned by Herr von Nicelli, and corrected one or two errors into which 
he had inadvertently fallen, I cannot in conclusion do better than urge your readers, 
especially the younger ones, to follow in the footsteps of Von Nicelli, and by accurate 
and long-continued observation, to ascertain the economy of some of the many species 
with which we are at present unacquainted. 
There can be little doubt that the publication of these doings of Von Nicelli will 
tend to a vast increase in collectors of the pupe of the genus Lithocolletis ; and it is 
by no means improbable, from the numerous pupz thus collected, that several species, 
new to this country, if not to science, will be obtained. 
Our paucity of poplar species, having indeed only one (Comparella) is not a little 
remarkable. Poplar trees are not such rarities that the species feeding on them should 
not ere this have found their way to all our cabinets.—H. T. S. 
