206 fate entomologist's REcoftb. 



transverse ribs, about 40 in number, faint pittings occurring between 

 these. The micropyle forms a small darker-coloured crater at the 

 very apex of the egg. [Egg described April 2Gth, 1897, under a two- 

 thirds lens.] 



(roHi'pti'ri/x rluoiini. — The egg is described by lleilins as follows : — 

 "Laid singly, generally on a rib of the underside of a leaf of llhamnus 

 frani/ula, but one leaf, which I picked, had two eggs on the underside 

 and one on the upper. The shape of the egg is flask-like, cylindrical, 

 set on end, about 1"3 mm. high, •■4 mm. in diameter at the base, 

 •5 mm. at the widest, narrowing to -15 mm. at the top ; the shell is 

 very delicate and glistening, with twelve longitudinal ribs or flutings, 

 and fine intermediate parallel lines ; colour silvery-green at first, 

 turning at last to yellow" {Larr. of Brit. Butts., vol. i., p. 146). I have 

 mislaid my own description of the egg, made in 1898, and can only 

 find the following note : — " Just before hatching, the egg of (x. rhamni 

 turns to a dull brownish-grey colour, whilst the markings on the 

 embryo appear, under a two-thirds lens, as a black spiral running 

 up the egg from the base. The base is distinctly flanged, i.e., has a 

 flat outside rim, owing probably to the weight of the egg affecting its 

 fluid condition when laid. The apex is roimded." 



[jcucopJuisia (luponclH'U. — The eggs are attached to a leaf-stalk of 

 the food-plant. " The egg is pale yellowish when laid, gradually 

 turning a darker yelloAV " (Merritield). It is a tall slender egg, of 

 Pierid appearance, someAvhat fusiform in shape, the basal attachment 

 being wider than the apex, the latter being turned a little to one side. 

 The basal attachment is circular and transparent, and the egg is of a 

 deep orange colour (under the lens) above the transparent base. There 

 are eight prominent longitudinal ribs, extending from base to apex, 

 although occasionally two unite just before reaching the summit of 

 the egg ; they are bright silvery in appearance. The slender trans- 

 verse ribs (50 in number) are very conspicuous where they cross the 

 longitudinal ribs. The micropyle at the apex is placed in a very 

 conspicious depression, which fills up the whole of the apex. [Eggs 

 laid May 5th, by females received by Mr. Merrifield from Dr. Chapman, 

 from Digne ; sent to me by Mr. Merrifield, May 11th, and described 

 under a two-thirds lens on May 12th.] 



LciicdjiJutsia sinapis. — One egg laid on the upper-side of the petal of 

 a flower of LatJii/nis, and a second on the under-side of a leaflet near 

 the apex. They both stand out at right angles to the surface to which 

 they are attached. The egg is of a pale yellow colour, the surface 

 very shiny, somewhat fusiform in shape, but narrowing much more 

 rapidly towards the apex than towards the base. The base is moder- 

 ately wide, and from it the egg slowly increases in size, until it reaches 

 about one- third from the apex, where it narrows off somewhat rapidly 

 to the apex, which consists of a shallow depression, at the base of 

 which the micropyle is placed. Looked at from above, the egg 

 presents the appearance of a circle, bearing angular (12 and 11) 

 points on its circumference. These are the longitudinal ribs, which 

 are somewhat conspicuous, and run from the base to the apex. The 

 surface is very finely ribbed transversely, about 42 ribs between the 

 base and apex. The number of longitudinal ribs appears to vary ; in 

 the two eggs examined, they numbered 11 and 12 respectively. There 

 is not such a well-developed base as in the egg of L. diiponcheli, nor 



