AUGIADES SYLVANUS. 137 



27th, 1905 (Raynor). A £ was observed to deposit an egg on the 

 underside of a blade of Brachypodium sylvaticum, July 24th, 1904, at 

 Lausanne, the larva appeared in eight days. On the afternoon of July 

 22nd, 1905, I again witnessed a 2 deposit an egg on the underside of 

 a blade of grass, that was probably Molinia caerulea, another egg was 

 subsequently found in a similar situation. Both these ova hatched on 

 July 30th, one of them certainly (and probably both) having been only 

 eight days in the eggstage(Sich). In confinement, the eggs are laid openly 

 and singly (Hellins) . In the Harwich district, Mathew has often seen the 

 females laying their eggs on Dactylis ylomerata and other coarse grasses. 



Ovum. — The egg is a little more than a hemisphere, the convex 

 side being apparently a portion of a sphere, the attached side plane. 

 Diameter 0-96mm., height 0-54mm. The colour is creamy-yellow 

 with a slight greenish tinge, getting rather orange towards maturity. 

 The sculpture is an irregular network, for the most part hexagonal, 

 the cells about 0-025mm. in diameter ; the lines separating them very fine 

 and narrow. Each cell is marked with 20 to 30 small dots arranged 

 in some degree in lines, whether these dots are thickening, or thin- 

 nesses, or alterations in texture does not appear. In the arrangement 

 of the cells one important point appeared, viz., that though the cells 

 are irregular and quasi-hexagonal over the top, near the base they 

 are arranged in vertical rows and differed only from the ordinary 

 arrangement of vertical (primary) and transverse (secondary) ribs, in 

 that the vertical ribs are not more marked than the transverse, and that 

 neither affect the form of the egg ; they are also very numerous, the 

 vertical ribs about 100 or rather over. The vertical ribs zigzag as is 

 frequent, i.e., the transverse ribs alternate in adjacent rows, they are 

 closer together than the vertical ones. The micropyle is surrounded 

 by an irregular rosette of eleven cells, each very narrow, but about half 

 as long as the others, they are followed by others rather longer, but it 

 is not till seven or eight rows (or circles) of cells outwards that a 

 distinct narrowing, making them radiants from the micropyle, fails to 

 be evident (Chapman. July 1st, 1901). The upright egg would 

 have been spherical but was much flattened at base. Under a lens 

 the micropyle appeared as a slight depression on the summit of the 

 egg, with a minute raised point in the centre. The general surface 

 under a low power appears smooth with lines running irregularly in 

 all directions over it like veins in marble. The surface-sculpture 

 really consists of a raised network enclosing polygonal cells, with small 

 raised bosses at some of the angles, these cells become more elongated 

 as they approach trie micropyle. The micropylar rosette consists of a 

 dozen very elongated cells with the outer ends rounded. When first 

 laid, the colour of the ovum was grey, but in some lights it looked 

 green from the reflection of the leaf on which it was laid. Its 

 diameter l-03mm., height 0'7mm. Very little change took place in 

 the colour, but on the sixth day a black spot appeared in the centre, 

 and two days later the larva appeared, the egg stage having only lasted 

 eight days (Sich, July 24th, 1904, and July 22nd, 1905). Other 

 descriptions are to be found (1) By Hellins, Buckler s Larvae, etc., i., 

 p. 196 (1886). (2) By Tutt, Ent. Record, etc., x., p. 15 (1898). Tonge 

 notes of the eggs figured in our pi. i., viz., fig. 4 from Maldon, and fig. 3 

 from Bourg St. Maurice, that the former has its greatest diameter 

 l-01mm., the latter l*20mm. 



Habits of larva. — The newly-hatched larva devours a portion of 



