ANTHROCERA FlLIPENDULjE. 521 



as two or three tiers are laid above the basal one, and the eggs become 

 at last placed very irregularly. Eggs laid July 24th, 1898, by ? 

 taken at Aix-les-Bains, began to hatch August 7th. About three days 

 before hatching they became dark coloured. Under a lens, this 

 darkening is seen to be due to the dark heads of the larvae showing 

 through the transparent shell, the embryo being distinctly bent back 

 in the form of a letter U inside the shell. The body of the unhatched 

 larva is yellowish, but the dark heads quite overwhelm the rest of the 

 colour of the larval embryos when viewed in mass. The full-grown 

 embryonic larva is small, and occupies only about a third of the space 

 within the shell. This suggests that the transparent pole of the egg 

 is really devoid of yelk." Hofmann figures the egg with a well-marked 

 polygonal reticulation. 



LARVA. Bacot says that he observes no difference between the 

 neuiij -hatched larvje of A. palustris, A. lonicerae, A. viciae and A. fili- 

 penthdaei The structure appears to be the same, and the arrangement 

 and position of the tubercles are identical. The description of A. 

 lonicerae in its first instar, therefore, practically applies (so far as 

 structure and the arrangement of the tubercles are concerned) to all 

 these species. When the larva has reached the hybernating stage, in 

 its third instar, it is of a pale yellowish or creamy colour, with complex 

 tubercular warts. Dorsal view : The head is retractile, placed ventrally, 

 the prothorax hidden by the mesothorax. The abdominal segments 

 are shiny, whitish, glassy in appearance, and separated from each 

 other by distinctly yellowish segmental incisions. The central area is 

 without tubercles, a broad longitudinal band of the pale ground colour 

 extending from the mesothorax to the anal segment. On either side 

 of this, but not distinctly raised above the segment, is a wart, clearly 

 divisible into an anterior and posterior portion, each with five black 

 tubercular points, forming a circle, with one similar one placed cen- 

 trally ; each point bears a long, yellowish, finely branched hair, with 

 a dark tip, the central one distinctly stouter. In the front part of each 

 segment, reaching to the segmental incision, and opposite the outer 

 and posterior half of the large dorsal tubercle, is a small roughly 

 quadrangular blackish patch, and a shade, slightly darker than the 

 ground colour, unites these so as to give the idea of a faint longitudinal 

 line ; pale longitudinal bands of the ground colour separate the dorsal 

 and supraspiracular warts, the latter of which, as well as the projecting 

 subspiraculars, can be seen in a dorsal view. The projecting, black, 

 tubular-looking spiracles on abdominal segments 1-2 are very conspicuous. 

 Lateral view: The ground colour is distinctly yellowish or cream-colour. 

 The prothorax is, however, glassy-looking, and the raised supraspi- 

 racular parts are also pale and glassy-looking ; each of the latter 

 carries ten black tubercular points (the central one very large), 

 each bearing a similar hair to those of the dorsal warts, but paler. 

 The prothoracic spiracle and the eight abdominal spiracles are jet 

 black, each consisting of a projecting tube-like structure, placed on a 

 little whitish cushion, and exceedingly conspicuous. The sub- 

 spiracular warts are very striking in this species, consisting of a ring 

 of six red-brown tubercular points, placed in the form of an almost 

 complete circle, with a larger central one, two similar minute but 

 separate points being placed directly below the lower edge of the circle ; 

 each point bears a glassy white minutely branched hair. There are 



