170 
THE entomologist’s RECORO. 
due to the flatness of the egg — it is nearly an eighth of the 
diameter of the egg in width, or, the inner egg is only three- 
quarters of the diameter of the shell. I have observed more 
distinctly in this species, that the moth in laying smears a 
cement on the surface on which she lays the egg, often extend- 
ing the width of the egg itself beyond the surface that the egg 
covers. The inner egg presents a series of brown spots 
(PL VIII., fig. 5), a series of very narrow marginal ones and 
two inner rows, the spots are not round, but angular, usually 
pentagonal, clearly indicating that if only a little more 
developed they would coalesce and reduce the pale area to 
rounded spots as in alni or aceris. The brown spots differ in 
different specimens, the extremes being merely indicated dots 
that might easily escape detection, and on the other hand they 
are so large as to occupy nearly as large an area as do the pale 
spots in aceris or alni. The specimen figured is about an 
average, but those with nearly evanescent spots are the least 
frequent. The ribs are 66 in number, and do not differ in 
structure or arrangement from the other species. 
The newly-hatched larva presents the same pale segments as 
alni, e.g., 3.4 and ii ; but the tendency of 10 to be pale in 
alni is not observed in megacephala. 
The head is black, the general colour rufous, except 3.4 and 
ri, which are very pale, 3 and 4 are also very small and narrow 
in the newly-hatched larva, ii is low and flat, but projects 
laterally. The tubercles are large raised bosses, paler than 
the rest of the segment, but without very defined margins. 
Each tubercle with one hair, dark basally and paler towards 
the tip, I mm. in length, the larva itself being 2 mm. The 
blackness of the hairs is very conspicuous on the pale 3rd and 
4th segments, on the nth they are shorter and paler than 
elsewhere, the size of the sub-spiracular tubercles is what gives 
this segment the appearance of width, or at least the width of 
the segment forms a boss on which the sub-spiracular hair 
(and tubercle ?) stands. The 2nd segment has a central flat 
hairless scutellum with three tubercles on either side, two in 
front and one behind. Seen laterally the larva is pale whitish 
or fuscous with a brown back from 5-10 and on 12 and 13, 
the dorsal tubercles showing as paler bosses out of the brown 
area ; on 12 and 2 the hairs exceed i mm. in length. When 
full-fed in this (ist) skin (PI. VI., figs. 5, 5a), the tubercles are 
distinctly separate and but little angled, on 12 they have the 
usual cruciform arrangement, but are small, circular and wide 
