12 
THE entomologist’s RECORD. 
As the collecting season is now drawing near, I would again call the 
attention of all collectors to the Rev. J. Seymour St. John’s book on 
“ Larva collecting and breeding,” etc. No collector should be 
without it. 
Pachnobia and TiENiocAMPA. — As no one enters a protest against 
Mr. Tutt replacing leiicographa and rubricosa in the genus TcBnioca 7 npa^ 
I should like to say a word or two on the matter. I have practically 
no knowledge of the literature of the subject, but I have reared all the 
species from the egg, except gracilis^ of which I have, however, taken 
the larva very small, and alpina^ which I have never seen alive in any 
state, (i). Tceniocampa lay the eggs in groups of from 20 to 50 or 
more, in regular order, like Triphoena and other Nuctua. Populeti and 
opwia sometimes lay them rather in a heap than in a proper manner. 
The eggs are flattened below and rounded above, the h^ght being 
about ^ of the diameter, as if they had been spheres, but had been soft 
and dough-like and sunk down with their own weight. They are 
ribbed, noctua-fashion ; towards the rounded top the ribs fade into a 
more or less hexagonal flat network, the ribs number over 45, usually 
50 to 60. In Pach 7 iobia the eggs are laid solitarily, flattened below, 
they tend to be slightly pyramidal upwards and the bold ribs terminate 
above in a raised coronet around the micropylar area. The ribs 
number 40 to 44. (2). The larvae of TcB 7 iioca 77 ipa feed on trees or 
bushes ; they spin tents in which to moult and even to feed. Mmiosa 
makes a net not unlike that of Eriogaster laTtesiris on a smaller scale ; 
gracilis lives in a tent till its last moult ; mstabilis as a rule only makes 
a tent to moult in ; populeti always lives between united leaves, but the 
others abandon this habit in the last skin. Mimda and cruda have the 
least of it. The larvae of Pachnobia live on low plants, never makes 
any tent and much resembles a Pade 7 ia or Ma 77 iestra. I have not 
sufficiently observed the pupae to enable me to point to any decided 
differences of generic value ; the two terminal spines arise more closely 
together in Pacli 7 iobia than in Tce 7 iioca 7 npa. (3). The perfect insect 
differs in a very important respect, — one sufficient to place it in a 
separate family rather than merely in a separate genus, viz., the wings 
are held when at rest, deflexed in pent-house fashion by Tcenioca 77 ipa. 
In Pachnobia they lie flat and cross one another. The outline of 
the wing is different, and in setting them the hind wing appears to be 
much more abundant and ample in Pachnobia. 
Trachea piniperda is much nearer to Tce 7 iioca 7 npa than Pachnobia is, 
the eggs are laid in groups, the moth sits with deflexed wings. Indeed 
it seems to be a true Tcenioca 77 ipa somewhat modified in colouring to 
suit its especial food; the striping of the larva being like that of 
goihica or mstabilis., and the markings of the moth being those of a 
Tcp.nioca 77 ipa., but the colouring ’is such as to harmonise with the rich 
tints of the bark of the smaller branches of Scotch fir, and the 
shadows of the pine needles. — T. A. Chapman, Firbank, Hereford. 
February., 1891. 
I suppose the following brief summary of some remarks made at the 
lENTIFIC NOTES. 
