46 
THE entomologist’s RECORD. 
in certain species of the genus Lithosia : — “ The Lithosia consists 
essentially of the following groups in their normal forms: (i) Spotted 
species as ;fiuscerda, (2) unicolorous golden species as aureola, (3) uni- 
colorous yellow-ochreous species as depla7ia, (4) grey species with lighter 
costa as griseola, and (5) grey species with distinct yellow costa as com- 
phma. If we simply study our well-known varieties, we notice that 
what is the typical or general form in one species, becomes varietal in 
another; thus griseola has an unicolorous yellow variety stramineola, 
and a form in which, the yellow costa is almost as distinct as in com- 
planula. Again depla7ia exhibits a bright yellow costa variety, and also 
a dark ochreous form. But pyg77iceola, generally considered a var. of 
lutarella, exhibits this parallel variation — or rather an attempt to follow 
the general forms of other species in its variation — in a most striking 
manner.” The first batch of these specimens exhibited showed an uni- 
colorous pale yellow form of the same shade as griseola var. stra77imeola, 
the second batch of the golden colour of aureola, a third set was of a 
dark grey colour with a pale costa like typical griseola, whilst another 
batch were leaden'grey with a distinct yellow costa like co77ipla7iula 2o\d.co77i~ 
phi7ia. In addition, an almost melanic specimen was exhibited, and Mr 
Tutt remarked that Mr. Bird had taken a specimen spotted somewhat 
like 77iuscerda. The named varieties of Dr. Staudinger’s Catalog were 
then noticed as also the fact that p)g7)iceola, though really subject to a 
great range of variation in itself, was treated as- a simple varietal form 
by Staudinger. Mr. Tutt drew attention to other genera where the 
tendency for varietal forms of a species, to follow other species is very 
marked, and suggested that among those Nocture which he had worked 
out, it was almost universally so. Mr. Heasler exhibited a series of 
Agathidiu77i 7iigrmu77i from Highgate Woods. 
Thursday, May ']th . — Exhibits : Mr. Tutt, a box of lepidoptera from 
Dr. Chapman, including a hybrid between A77iphidasys betularia and 
A. prodro77iaria, a very dark specimen of Tce7iioca77ipa populeii, almost 
exactly resembling T. mstabilis, a fine banded T. mstabilis, series of 
Cuspidia trideTis, Vwimia riwiicis, Cuspidia leporma var. bradyporbia, 
Botys terrealis, etc., from Hereford. Mr. Quail, very light cocoons of 
Saturnia carpmi, from Wicken, with the imagines bred therefrom, three 
being very good vars. Mr. Prout, bred series of Core77iia ferrugata and 
C. unideTitata. With reference to the differentiation of these two 
species, he pointed out that uTiideTitata has a small V-shaped notch in 
the outer margin of the central band, near the costa, but this could not 
be traced in his series of ferrugata. Messrs. Clark, Tutt, Huckett, 
Hodges, and Milton exhibited series of the species of TriphcB7iidce, 
Mr. Clark reading the following account of the life-history of Triphce7ia 
subsequa : — 
“ In the autumn of last year (1890) I obtained a few eggs of this 
species from Forres. The first hatched on August 30th, and I reared 
the larvae through the late autumn on knotgrass {Polyg07iu77i aviculare) 
and dock leaves {Ru77iex pratensis) in a warm room, to avoid the large 
percentage of loss which usually occurs when one attempts to hybernate 
larvae. 
“ When first hatched, they are semi-loopers, of a yellowish drab colour, 
with minute brown spots round each segment, from each of which pro- 
trudes a tiny brown hair. Head dark brown. September 6th . — \st 
