1877.] 249 



forming wedge-shaped marts, that on the 11th segment being much darker than the 

 others ; there is also a distinct yellow spot, situate on the medio-dorsal line, on the 

 posterior of each segment ; spiracles very minute, greyish-pink. 



Ventral surface dull greyish-green, irrorated with brown ; the legs have their 

 bases smoke coloured. 



By the middle of the month, all the larvae had disappeared beneath the surface 

 of the earth in their cage.— Geo. T. Poreitt, Highroyd House, Huddersfield : 

 March Qth, 1877. 



Description of the larva of Lohophora hexapterata. — For several years I had 

 been keeping by me a description of the larva of this species, taken from specimens 

 beaten by myself, or sent to me by friends at various times, but it was not until 

 1875 that I was enabled, by the kindness of Mr. A. H. Jones, to describe the egg 

 also. I received some eggs on May 30th ; the larvae hatched on June 1st, were full- 

 grown in about four weeks, and spun up during the first week of Jvily ; captured 

 larvae usually spun up a week or so later. I am convinced from experience that 

 aspen, Populus tremula, is the food, and though the larva will, for a time, eat other 

 species of poplar, it will not thrive on them. 



The egg is broadly oval in outline, flattened, and laid on its side ; the shell 

 shining, and covered all over with delicate hexagonal reticulations ; the colour at 

 first pale green, afterwards whitish. The young larva is at first pale dull wliite all 

 over, afterwards becoming greenish. When fuU-fed, the larva is about three-quarters 

 of an inch long, its figure rather stout, of even bulk, cylindrical, but showing to the 

 eye as if almost squared ; this appearance seems to be caused, first, by the absence 

 of a dorsal line, for the pulsating dorsal vessel is scarcely to be seen without a lens, 

 and so the eye catches the sub-dorsal line as forming the edge of a flat back ; and 

 secondly, by the habitual position of the larva, which, when at rest, contrives to lie 

 perfectly flat on tlie surface of a leaf, somewhat in the fashion of those species which 

 spin leaves together, though in this case I have never detected any spinning whatever ; 

 the lobes of the head are horny, and well-defined, the hinder segments taper a little^ 

 and there are two short anal points ; the skin is somewhat wrinkled ; the ground- 

 colour is pale yellowish-green ; the head dull pale green with small black ocelli, the 

 mouth reddish-brown ; the sub-dorsal line (the only ornamentation) is pale yellow, 

 below it the side is more yellowish-green in tint than the back ; the spiracles very 

 indistinct, pale yellow ; the belly whitish-green ; the segmental folds yellowish when 

 the larva is at rest, when it is in motion tliey appear green ; the anal points pinkish- 

 white ; altogether this is a very dull looking larva, having so little variety of colour. 

 When spinning, it makes a neat cocoon, three-eighths of an inch long, and just half 

 as wide, compactly woven of dark silk, with fine grains of earth, &c., stuck over it ; 

 the pupa is five-sixteenths of an inch long, cylindrical, the eyes prominent, the 

 abdomen about one-third of the length and tapering off in a curve, and ending in a 

 bifid spike ; the colour on the thorax and wings very dark greenish, on tlie abdomen 

 deep reddish-brown ; the skin rather glossy.— J. Het.lins, Exeter : Vllh January, 1877. 



The Stack Eocks.— On July 18th, we started early in the afternoon for a drive 

 along a range of rocky coast six or seven miles away, to view the sea-birds in their 

 breeding-places on the Stack and other rocks. On the road my attentiDU was 

 attracted by small Tortrices hugging the hedge-side, and alighting, I was surprised 



