162 THE ENTOMOLOGIST. 



Description of the Larva ofNocliia triangulum. — Length, 

 when full fed, 1 inch and 3 lines when at rest; 1 inch and 

 6 lines when extended. Head small, retractile. Body obese, 

 cylindrical, distinctly attenuated in front, tapering from 6'th 

 segment to head, the 2nd segment being manifestly narrower 

 than any of the others; the r2th segment is a little elevated 

 behind; segmental divisions well marked; each segment is 

 wrinkled transversely, and there is a distinct lateral skinfold; 

 there is a semicircular corneous plate on back of 2nd segment. 

 Colour of head wainscot-brown, reticulated with black at the 

 sides, umber-brown in front: this latter colour is bounded by 

 two black parallel lines, one on each side of the median 

 suture. Dorsal surface either dull ochreous or ochreous- 

 brown ; in either case delicately reticulated with black. On 

 each segment from 5th to 12th is a somewhat diamond- 

 shaped mark, either dull reddish brown, dull umber-brown, 

 or bistre-brown ; this is very indistinctly marked on the 5th 

 and 6th segments, and on the 12th is reduced to a triangle, 

 the apex of which points forward : through this series of 

 marks passes the slender, ochreous, medio-dorsal line, edged 

 on each side by a fine dark line ; it is usually obliterated in 

 the centre of each segment, reappearing for a short distance 

 on each side of the segmental division ; at the division itself 

 it is obliterated by its dark edgings becoming there united, 

 and forming a spot — only visible, however, when the larva is 

 in motion. The subdorsal lines are extremely indistinct, 

 ochreous, interrupted, and only visible on the posterior 

 segments ; they are bordered above by a fine brown line, 

 which ends on each segment in a slight curve at the lateral 

 angle of the dorsal diamond; sometimes the pale lines are 

 altogether absent, and their place only indicated by this fine 

 curved line; on each of the 11th and 12th segments the 

 place of this fine line is occupied by a conspicuous black 

 mark, one on each side of the dorsal line; those on the 11th 

 segment are elongated wedges in form; those on the 12th 

 larger and more decidedly triangular, the apices of the 

 triangles pointing forwards, and their bases united by a dark 

 brown line forming the anterior boundary of a transverse 

 ochreous band, occupying the posterior edge of that segment 

 and uniting the subdorsal lines. The lateral surface is the 

 same colour as the dorsal diamonds, and is delicately reticii- 



