THE CANADIAN ENTOMOLOGIST 399 



After remaining in the larval mines for several days the colours 

 become darker and the markings more distinct. 



Full grown larva. Length 7.5 mm. Elongate, composed of 13 

 segments, very little tapering posteriorly. Colour white except the 

 head, most of the first thoracic segment, legs and upper side of 

 anal segment, which are brownish or brownish red. Thoracic and 

 abdominal segments convex above and less so below. Head sub- 

 quadrate, flat, shining, with median dorsal line groove terminating 

 in an inverted V. Head about J^ the greatest width of the first 

 thoracic segment. Antennae 3-jointed, joints of equal length. 

 First thoracic segment 13^ times the length of the second. 

 Second and third of equal length. Thoracic segments of equal 

 width, sides arcuate. Sides of abdominal segments 1 to 8 pro- 

 duced into triangular tubercles (giving abdomen a notched ap- 

 pearance) capped with minute globular tubercles bearing several 

 minute hairs. First thoracic segment bearing a faint, median 

 dorsal impressed line with a transverse, foveiform impression on 

 either side. Dorsal surface of 2nd and 3rd thoracic segments 

 and abdominal segments 1 to 8 each with a transverse, median 

 impression and a short, oblique one on either side. Ventral sur- 

 face of abdominal segments 1 to 8 similar to dorsal surface except 

 that the transverse impressions are somewhat curved. Nine pairs 

 of stigmata, one pair on second thoracic segments, and a pair each 

 on all abdominal segments except the 8th. Each abdominal 

 spiracle situated at the base of the lateral tubercle a little before 

 the middle of the segment, the ninth pair in the dorsal surface of 

 the anal segment. Thoracic and anal stigmata larger than the 

 others. 



Pupa. Length 6.5 mm. Resembles larva in general shape 

 but is shorter and more convex. Colour reddish brown. Abdomen 

 showing lateral tubercles conspicuous in larva, each tubercle bear- 

 ing 2 or 3 long bristles. Dorsal surface of 1st thoracic segment 

 bearing 6 pairs of minute tubercles arranged in a triangle of three 

 on either side of a fine median white line, each tubercle bearing a 

 long spine-like hair. Dorsal surface of each abdominal segment 

 bears 10 minute tubercles, (4 medially and 3 lateral ones on either 

 side) each bearing a long spine-like hair. A pair of spine-like hairs 



