1)0 THE CANADIAN ENTOMOLOGIST 



present, the raised spiracle being situated posterior to the upper one near tlie 

 rear margin of the segment. Length 14 mm. 



Pupa (Fig. 2). — Pale green, with long, white, subequal hairs; wing-cases 

 smooth with fringe of short hair only on margin of primaries. The ends of the 

 leg sheaths project free but unequally above the fifth and sixth abdominal 

 segments; the inner sheaths (prothoracic legs) reach to the rear edge of the 

 fifth segment, the outer ones (mesothoracic) to the middle of the sixth segment; 

 beneath these a third pair (metathoracic) projects still further, reaching nearly 

 to the rear edge of the segment. The antennal sheaths are slightly shorter 

 than the prothoracic legs. Apex of pupa sloping gently forward to base of 

 antenna? where a distinct crescentic flange or ridge is formed; a distinct sub- 

 dorsal ridge is present, becoming obsolete caudad to the second abdominal 

 segment. There is a narrow, cream-coloured dorsal stripe, a broad subdorsal 

 one along the ridge, encircling tubercles I and II, two pale broken lateral stripes, 

 slightly downwardly oblique from front to rear, the lower one broader and cross- 

 ing tubercle III, and a creamy stripe along the lateral flange. 



The tubercular setae are reduced in number as compared with those of the 

 larval stage; two white hairs arise from both tubercles I and II, tubercle III 

 shows a single hair; tubercles IV and \^ appear to have become separated, 

 both being situated on the lateral flange, the former with two, the latter with 

 two or three smaller hairs. The number of dorsal hairs is increased on the 

 two posterior abdominal segments and on the thoracic ones tubercle III shows 

 the usual two setae. There is on the prothorax a posterior row of eight setae 

 crossing the segment, a single lateral hair and a fringe of hairs across the apex. 



Apart from the difi^erent arrangement of tubercular hairs and the distinct 

 food plant, the larva may be readily differentiated from that of elUoi-ti by the 

 distinctly spiculate nature of the hair, the dull white colour of the same and the 

 fact that the hairs are finer, subequal and considerably shorter than those of 

 ellicUi; the pupa is recognized by the lack of all secondary hairs and the absence 

 of any fine hairs on the wing cases, except the single row along the lateral margin. 

 In the imago the best point of distinction seems to be the absence in the present 

 species of the dark costal streak above the base of the incision on the primaries; 

 the whole costal portion from base to apex is suffused with smoky brown but 

 there is no trace of the distinct dark costal streak which is clearly visible in 

 cUiot'.i; of course, in rul)bed specimens an exact determination is most difficult. 



Pterophcrus elliotti Fern. 

 Larva (full-grown). — Head pale ochreous. Body light green with long, 

 white, shiny, non-spiculate hairs from the tubercles, the longest being about 

 4 mm. in length. Except on the prothorax there is a distinct creamy dorsal 

 line broken in the centre of each segment by a small, round dot of the ground 

 colour; traces of a pale sul)dorsal line are visible crossing tubercles I and II, 

 especially shortly before pupation ; a somewhat broken pale lateral line midway 

 between tubercles I and III and a similar spiracular line, broken on the posterior 

 portion of each segment. Prothoracic plate indistinctly defined, the arrange- 

 ment of seta' on this segment being similar to that found in homodaci-ylus. On 

 the other thoracic segments tubercle I + 11 bears two long, central hairs and 

 three shorter ones, two anterior and one posterior. A single minutehairissituatcd 



