106 [May, 



colour, less attenuated, lart^er, and more plump. When, however, 

 they reached their last skin the difference was much more marked, 

 the larvae of yw-y/co/or being then cylindrical, short, and plump, very 

 slightly attenuated towards each extremity, and their general colour 

 was of a warm reddish-ochreous, and more resembling the larvae of 

 lithurffi/ria than those of 'pollens, which are always of a more or less 

 cold greyish or putty colour, with very slight tints of ochreous. 'J"he 

 larvae of favicolor moreover are considerably larger than those of 

 pallens, which are also much more attenuated and more slender. 



Descriptions of LARViE takp:n at differemt periods. 



July 25th. — After second change. Head light reddisli-brown, with a darker 

 stripe on each lobe ; whole of the upper surface pale sap-green with darker dorsal 

 and spiracular stripes ; under surface mucli paler ; each segment with a few pale 

 hairs. 



August 15^A.- -Length about 14 mm. Head pale reddish-brown, reticulated 

 with darker dots ; general colour olive-brown ; dorsal stripe darker with a narrow 

 pale line in the centre, then a rather broad pale stripe widest on the middle seg- 

 ments, followed by a narrow whitish line bordered by a darker shade ; next comes 

 the spiracular stripe, which is somewhat broad and grey; the spiracles are black 

 and rather conspicuous, those on the second and twelfth segments being much the 

 largest; below the spiracles comes a yellowish- white stripe; under surface rather 

 paler; there are a few short bristles, those on the head and posterior segments 

 being the longest. 



January 10th. — Length, 20 mm. Head pale reddish-brown with a darker 

 streak, composed of minute dots, on eacli lobe ; mouth dark brown ; general colour 

 oehreous-brown tinged with pink ; dorsal line very narrow, light ochreous, and most 

 conspicuous on second to fourth segments, and bordered by a dark clouding on each 

 side, particularly on the central segments ; tlien follow sevei-al nai'row stripes or 

 lines alternately pale jjinkish-brown and dark pinkish-brown until the broad spira- 

 cular stripe is reached, this is light greyish-brown bordered above by a very narrow 

 and slightly waved pale line; the black spiracles are seated on the lower edge of 

 the spiracular stripe, except those on the third and fourth segments, which are much 

 smaller and situated a little above the lower edge ; the subspiracular line is ratlier 

 conspicuous, and light pinkish-ochreous, slightly darker along its centre ; under 

 surface ochreous-brown ; posterior pair of legs tipped with dark brown ; two minute 

 black dots (probably tubercles) placed diagonally on each segment, and a few others 

 elsewhere ; a few pale hairs or bristles on posterior segments and head, those on the 

 lower part of the head just above the mouth the longest and pointing foi'ward. 



January 2bth. — Head pale wainscot-brown, slightly shining, and irrorated with 

 minute darker specks ; a dark streak on each lobe, and a small dark blotch above 

 the mouth ; dorsal plate on the second segment of the same colour ; general colour 

 of upper surface a warm wainscot-brown ; a narrow pale dorsal line most conspicu- 

 ous on the anterior segments, and running through the dorsal plate on the second 

 segment; this is bordered on each side by a darker clouding (in some larvas this 



