1881 .) 
211 
Hie ground is now of various shades of ochreous-yellow, the darker specimens 
having a strong rust tinge along the sides ; head of various shades of brown, in some 
being of a dark sienna colour ; in all there is the pale yellow front triangular mark 
so noticeable in the earlier stage, and there is also another distinct streak of yellow 
on the side ot each lobe ; a brown stripe enclosing a very fine yellow line, and 
broadly edged outwardly with yellow, forms the dorsal 6tripe ; a double smoke- 
coloured line composes the sub-dorsal stripe, and between it and the dorsal stripe 
are two other irregular yellow lines; above the spiracles is a yellow line edged on 
each side with smoke-colour, and between it and the sub-dorsal stripe another 
irregular yellow line ; spiracles and tubercular dots black. 
Ventral surface of various shades of dull oehreous, with two greyish central 
lines ; a black mark on the 7th and 8tli segments ; and a smoke-coloured stripe 
below the spiracles. 
Feeds during the night ; in the day-time remains extended at full length, flat 
along the stalks of the food-plant. 
The cocoon is composed of bits of the food-plant, firmly knitted together with 
very closely woven silk ; in a state of nature, however, it would probabv be on the 
ground. The pupa is about five-eighths of an inch long, and of the ordinary shape, 
though rather blunt and dumpy ; colour deep purplish-brown, with the abdominal 
divisions and spiracles still darker; it is powdered over with a very pretty violet 
bloom, though more so on the head, thorax, and wing-cases, than elsewhere. 
From these larvae I reared a long and beautiful series of imagos the following 
June. — G-eo. T. Poeeitt, Highroyd House, Huddersfield : January 8 th, 1881. 
IIoio to find the larva of Triphcena subsequa. — January and early February, if 
mild in the season, to sweep for the larvae of T. subsequa. It feeds at night but is 
out on the blades and stems of grass in the afternoons, stretched at full length; it 
frequents dry sandy banks, especially where dense beds of Dactylis glomerata appear, 
I think it is entirely a grass feeder in its natural state, though it will eat other herbage 
in confinement, at least, I have never found it feeding on anything else but D. 
glomerata and Triticum repens. — H. Williams, Croxton Vicarage, Thetford : 
December 28th, 1880. 
[These notes are additional to those published by Mr. Williams in this 
Magazine, vol. xiii, p. 210. — Eds.] 
Remarks on monogamy , or the contrary, in Insects. — The remarks of Messrs. 
Douglas and Butler, ante pp. 114, 133, have brought to my mind two circumstances 
that may be of some little interest. 
When at Norwich some years ago, I had the curiosity one day to examine the 
little bunches of dead hawthorn leaves, so common in closely clipped quickset hedges 
in the winter. To my surprise I found almost every bunch held together and 
fastened down to the twigs by a cocoon of the Vapourer (0. antiqua), and in nearly 
every case the cocoon was that of a female — evidenced by the batch of eggs spread 
regularly over it. It then occurred to me as a possible explanation, that the female 
larva must seek by preference a more sheltered or protected situation than that of 
the male. This may sometimes cause an apparent inequality in numbers between 
the sexes in the larva-state, certainly it would help to account for the difficulty of 
finding the female moth. 
