RELATIONSHIP OF CALLIMORPHA HERA AND EUTHEMONlA RL'SSULA. 27 



observation. Within a day or two I added notes to the description 

 of the egg of C. hera, made, when properly mounted, under a two- 

 thirds lens. 



Eggs. — Callimorpha hera. — The eggs are laid side by side very 

 regularly, in parallel rows. The batches, however, vary greatly in 

 number, some comprising as many as a hundred eggs. When newly 

 laid the egg is very pale yellow in colour, inclining to pearly-white 

 under the lens. In shape it forms not quite two-thirds of a sphere. 

 The egg-shell appears at this stage to be quite smooth, except in the 

 micropylar area, which shows an indistinct polygonal reticulation. 

 [Described August 6th, from eggs obtained from a $ captured at St. 

 Michel de Maurienne.]] On August 28th, I made further notes from 

 eggs obtained between August 16th-18th, at Susa (in Piedmont). The 

 shell is covered with an irregular polygonal reticulation, some of the 

 divisions being quadrangular (diamond-shaped), others pentagonal, the 

 latter being the more frequent shape of the cells. The micropylar 

 area is not depressed. The shell is perfectly transparent, and the 

 embryo can be distinctly seen within. The embryo escapes at the 

 upper side of the egg, by eating an oval hole in the shell. After it 

 has escaped, the larva eats away the rest of the egg-shell, which is 

 highly iridescent. 



Knthemonia rnssula. — The eggs are laid side by side in contact with 

 each other in small clusters. Each egg forms rather less than two- 

 thirds of a sphere, with a very flattened base. It is of a pale yellow 

 colour, very shiny and pearly-looking under a microscope, the surface 

 being covered over with a very fine and delicate irregular polygonal 

 reticulation, tending to hexagonal and pentagonal divisions. The 

 micropylar area is very slightly depressed, but with the exception of 

 the reticulation being finer, the polygons formed smaller, and the 

 arrangement stellate in character, there is very little difference 

 between the appearance of this and the remaining surface of the egg. 

 [The description was made under a two-thirds lens on August 24th. 

 from eggs laid by a 5 captured at Aix-les-Bains on August 20th] . On 

 August 29th, I noticed that the eggs had become dark grey in 

 appearance. The embryo was observed, under a lens, to be fully 

 matured, and the shell shiny and transparent. Just before hatching, 

 the dark hairs form distinct rings round the basal half of the egg. On 

 August 30th the eggs began to hatch. 



Larvae. — C. hera. — The newly-hatched larva of C. hera is quite 

 white in colour, with the exception of the very pale brownish head, 

 the intensely black ocelli, and a pale flesh-coloured tint tinging the 

 transparent dorsal prothoracic plate. The hairs are quite white, and look 

 as if divided into distinct segments, contracted at their union with the 

 adjacent segments. These glassy- looking hairs rise from transparent 

 glassy-like tubercles, which occupy a very great part of the body surface. 

 An hour after the hatching of the larva the head is pale brown, not 

 so wide as the prothorax, into which it is slightly retractile ; ocelli 

 black ; the face sprinkled with pale brown hairs. The body is of a 

 creamy colour, with large grey tubercular patches, the dorsal almost 

 semi-circular in shape. Dorsal vieir. — The prothorax is tumid, with a 

 large brown lunular, dorsal plate, along the front edge of which are 

 four large tubercular warts in a straight line, and four smaller ones 

 (forming a curve) behind ; each tubercle bears a grey hair. The 



