THE CA.NADIAN ENTOMOLOGIST. 383 



On July 14 many sj)eciinens moulted for the fourth time. 



Sfage V. — Length 18 mm. The larvae in this stage are not constant 

 in general appearance as heretofore, but vary considerably in colour, being 

 pale green, brownish green, or decidedly pale brownish. Head 2.0 to 22 

 mm. wide, in the light coloured larvge pale, almost concolorous with the 

 body, and without any spots, but in the darker larvae distinctly mottled 

 and marked with dark brown, particularly on the inside upper portion of 

 cheeks. The green larvae are almost exactly the same as in Stage IV, but 

 the brownish larvae are different. In these specimens the dorsal stripe is 

 broken, and is bordered on either side with dark brown, and in the 

 incisures, es[)ecially those of the central segments, the colour is decidedly 

 yellowish. Sublateral area rather heavily dotted with black or dark brown, 

 giving a b'ackish appearance to this area just above the spiracles. The 

 stigmatal band in some of the green larvae is now inconspicuous, the upper 

 margin showing simply as a white line connecting the spiracles. In the 

 darker specimens it is much the same, but more conspicuous on account 

 of the dark colour above the spiracles, and the space occupied in previous 

 stages by the stigmatal band being flushed slightly with red. Spiracles 

 white, elongated, rimmed with black. Ventral surface of all specimens 

 paie green, marked with small white spots and streaks. Feet pale. 



On July 19 some of the larvae again moulted. 



Stage VI. — Length 27 mm., cyhndrical. Head 3.0 to 3.2 mm. wide, 

 rounded, honey-yellow, coarsely mottled with dark brown; frontal field and 

 clypeus dark brown, not mottled ; clypeus large, margined with white, and 

 running three-quarters up the face to the base of the vertical groove ; 

 mandibles tipped with black. Ground colour of body in varying shades 

 of gray or drab ; all larvae dark, none green. A few specimens are of a 

 rather ruddy brown hue. The dorsal and lateral stripes are clearly defined, 

 but less conspicuous than before. Somewhat triangular-shaped black 

 velvety patches lie above the lateral stripes and run out to the dorsal stripe, 

 where they sometimes almost meet on the anterior portion of the segments. 

 These are more conspicuous on the posterior segments, but on some 

 specimens hardly show at all. Above each spiracle there is also a 

 conspicuous black velvety field clearly defined below, which renders the 

 upper margin of the stigmatal band very distinct. The stigmatal band 

 itself is pale yellow, and much flushed with red, particularly below the 

 spiracles. Spiracles white. Ventral surface pale green, the darker 

 specimens sometimes streaked and mottled with black on the substigmatal 

 area. The ruddy specimens similarly show a red mottling. Piliferous 



