THE CANADIAN ENTOMOLOGIST. 187 



not conforming to either arrangement. Upon meso- and metathorax, 

 tubercle II. stands laterally close to tubercle I. upon the subdorsal line, 

 and tubercles III. and IV. stand in similar relation upon the sublateral 

 line ; other tubercles upon these segments well separated and situated in 

 nearly the same transverse line ; upon the abdomen, with the exception 

 of 9th and 10th segments, tubercles I. and II. stand longitudinally upon 

 the subdorsal line, II. being slightly further from the dorsal line than I.; 

 tubercles III., IV. and V. are separated, and form the apices of a 

 triangle around the spiracle, which, upon the first abdominal segment, 

 stands very near the centre of this triangle, but upon the other segments 

 it stands in line with III. and IV., and midway between them; thus IV. 

 is sub-postspiracular, while III. and V. are on the anterior third of the 

 segment ; tubercles VI. and VII. present. 



Stripes much less distinct than in later stages ; dorsal, lateral and 

 stigmatal stripes brownish gray, apparently due to numerous evenly- 

 scattered pigment spots in the epidermis ; intermediate stripes (sub- 

 dorsal, sublateral and substigmatal) pale yellow. Stripes irregular in out- 

 line, of different widths, dorsal stripe widest. Upon the abdomen 

 tubercles I. and II. stand between the dorsal and subdorsal, III. in the 

 sublateral, and IV. and V. in the substigmatal stripe ; tubercles light 

 brown in colour, each bearing a short, white, blunt spine. Stripes 

 become indistinct during this instar, which lasts four days. 



Second Instar. — During the two or three days following the first 

 moult the average length of larvae at rest increases to about 7 mm., while 

 at the end of this instar the average is about 8 mm. 



Segmentation now fairly distinct. Head rounded, colour mottled 

 light and dark greenish ; mandibles serrate, tipped with reddish brown ; 

 clypeal sutures distinctly marked ; antennae and palpi tipped with brown. 



General colour of body light green, with six longitudinal white 

 stripes alternating with dark green ones ; dorsal stripe dark, broadest 

 and darkest upon the cervical shield. Tubercles I. and II. stand in 

 edge of dark dorsal stripe, III. in upper edge of dark stigmatal stripe ; 

 leg shields with a V-shaped dark marking. 



General colour of under surface of abdomen light green. Pair of 

 vestigial prolegs upon sixth abdominal segment more prominent than in 

 first instar ; each segment bearing no prolegs furnished with tubercles 

 VI. and VII., as in previous instar. 



Soon after hatching, the larvae were divided into two lots, one of 



