EDWARDSIA W- ALBUM. 189 



six or seven about the spiracles. The 3rd, 4th, 5th, and 6th abdominal 

 segments are much the same, all have a second dorsal hair, nearly, or 

 quite, 0'4mm. long. The 7th abdominal is a somewhat reduced 

 segment, with dorsal long hair, as in the preceding, but with 

 numerous dorsal lenticles, and a central transverse patch, without 

 hairs or lenticles, which is either an actual or obsolete gland. On 

 the 8th abdominal segment the large spiracles are high, and diminish 

 the dorsal area, which does not appear to possess any, or only one, 

 very long hair ; behind the spiracle is a base point, with the skin 

 tessellffi radiating from it, again an actual or vestigial gland. The hairs 

 are longer on the terminal segments, a dorsal hair on the 7th abdominal 

 being about OSmrn., and some of these on marginal flange of 8th, 9th, 

 and 10th abdominals being about 1-Omm. long. Each pad of prolegs 

 and claspers has from eleven to fourteen hooks, all in a row, but 

 alternately longer and shorter. The whole dorsal skin surface has 

 the tesselated pattern, but ventrally, especially in the incisions, it 

 passes into an arrangement of spicule (Chapman). 



Ovum (antea, p. 154). — This egg is very flattened, and at first glance, 

 to the naked eye, might easily pass for one of the Coccid scales, of which 

 several species occur at precisely the position it occupies, viz., amongst the 

 wrinkles near a bud, where a leaf has fallen off a small twig. Under 

 a hand lens, on top view, it looks very like a mince-pie baked in a 

 saucer with the margin crinkled ; seen sideways, it suggests an acorn, 

 but one more flattened down than the flattest I have seen. It is just, 

 or barely, 1mm. across, with a dark domed centre and a pale flat, or 

 even raised, margin of about O08mm. wide. On a lateral view, it is 

 0-35mm. high (little more than one-third of the width). It is cup- 

 shaped up to a height of 0-2mm. ; at this height the pale margin goes 

 right across, but there rises up from within the cup the dark 

 dome, which is 0*65mm. wide, when it first shows above the margin, 

 rises to 0-1 5mm. above it, and shows a rather flattened top for about 

 035mm. across the centre. The pale tufted base looks very like a 

 flat acorn-cup, the dark interior like the acorn projecting above it. 

 The sculpturing is somewhat difficult to describe ; it consists of the 

 added surface material as in (all ?) other Ruralid eggs. This is very 

 trifling over the summit where the egg itself may be said to be visible, 

 but is abundant as a zone of white columnar material round the 

 margin of the egg. The egg, which appears to be about 1mm. across, 

 is probably only about OSmrn., if this addition could be removed. On 

 removing the egg, and turning it over, the underside is found to be 

 covered with a network, the walls of which are very narrow, but 

 comparatively high, making the cell rather deep. The cells are about 

 O04mrn. in diameter. In the centre they are very regular hexagons, so 

 that, with the high white walls of the cells, it looks like a piece of newly- 

 made honeycomb. Towards the margin the cells are of less regular form 

 (to accommodate the curvature), and get deeper and deeper till they form 

 part of the deep marginal layer. This layer is about 0-08mm. thick, the 

 half of this nearest the eggshell is apparently a hexagonal (approximately) 

 structure, just like that over the base. The upper, or outer portion, 

 consists of thick columns of white material, wider at their apices, and 

 about as thick as the spaces they leave between them, and arising from 

 the angular points of intersection of the honeycomb network. This 

 structure ceases very suddenly, and, at a definite line, changes to the 



