LIFE-HISTORIES. 299 



when first laid, suvface very sliiny, and (witli a two-thirds used as a 

 hand lens) looks almost smooth ; a faint reticulation, however, is 

 visible, bat a higher power is needed to make out the nature thereof, 

 (Described August 4th, 1899, from eggs laid quite loosely on the same 

 day by a female captured at Simplon.) 



EmyiJla cam] Ida (? ciibrum var.). — Eather more than half a sphere ; 

 the surface very finely and minutely reticulated ; not very shiny ; 

 colour orange-yellow ; the micropylar area does not appear to be even 

 slightly depressed [Laid (and described) August 4th, 1899, side by 

 side in short regular rows, by a 5 caught at Simplon] . On the 6th 

 they had become reddish-brown, and by the 7th purplish-brown ; the 

 surface very bright and shiny ; by the 9th the darkening had increased, 

 having become chocolate-brown in tint, whilst the surface shone like 

 silver ; a small circular apical area represents the micropyle, and 

 forms a minute rosette, which has not the same polish as the rest of 

 the surface of the egg. 



IJtJtrma f/rixeola. — An unfertilised egg of L. i/risrola, received from 

 Mr. Bacot, is dark reddish-brown in colour, the surface strongly pitted 

 at the shoulder, becoming regularly reticulated polygonally below the 

 shoulder, with a deep apical micropylar depression, at tlie bottom of 

 which is a minute central cellular structure (the micropyle), surrounded 

 by radiating lines, extending up the sides of the depression. — J. W. 



TuTT. 



Hi/Iiip/iila jiraainana. — l-Omm. in diameter, almost exactly or all 

 but a hemisphere, very similar in shape to the egg of an Acronijcta. 

 When laid very pale greenish or colourless and quite transparent. At 

 the summit is the micropylar cup 0-13mm. in diameter very nearly 

 smooth, but with a central cell surrounded by a circle of petals reaching 

 very nearly half-way to margin of cup. The margin of the cup is a 

 raised ridge, rather sharp, formed by the first circle of secondary ribs, 

 and is thus seven or eight angled. From the seven or eight angles 

 start the primary ribs to the egg margin. Inside the rim of the cup a 

 few lines of ribbing can be made out but so faintly that the impression 

 that the interior of the cup is smooth is nearly correct. The ribbing 

 is doubled at once by an intermediate rib arising from the centre of 

 the first secondary rib below the cup. The seventh secondary rib, 

 below this again starts another intermediate rib, so that if there 

 were seven primary ribs at the top, these would become 14 and then 28. 

 As a matter of fact there is some variation. A specimen actually 

 counted as 13 and not 14 and in another 32 marginal ribs counted. 

 There may be more or less than 7 ribs starting at the top and these do 

 not always afford a new rib in tlie interval. Half-way down the egg 

 however, Avhen the 14, bscame 28, there is almost absolutely no 

 variation in the intermediate rib being found. The secondary ribs 

 towards the margin below the last increase of ribs are 7 and then 

 follows a slightly swollen flange in which the egg rests, this is part of 

 the egg and not a gluey extraneous material. The primary ribs are 

 high and very sharp, the valley between them hangs in a catenary 

 curve to a depth of about one-third its width, the secondary ribs are 

 equally sharp, crisp, narrow, but hardly rise above the surface. When 

 the egg matures it becomes yellowish and separates from the shell 

 sufficiently to have a colourless marginal zone, whilst the top of the egg 

 down to the marginal ribs becomes of a rich chocola,te-brown, with 



