134 THE CANADIAN ENTOMOLOGIST. 



black seta and the dorso-anterior one of III is also black ; the remainder 

 are white. On the 9th abdominal segment the whole dorsal portion to 

 each side of the central line is occupied by a large tubercular patch con- 

 taining three black and one white setae, the latter situated on the lower 

 posterior portion ; below this large patch is a small tubercle with a single 

 white seta. . The anal plate is small, oval, and dark in colour, containing 

 two central setae and a marginal row of six minute white ones on posterior 

 side. Legs blackish ; prolegs similar in colour to body. Length, 3 mm. 

 Stage IL — Head black with numerous short setae; body greenish, strong- 

 ly marbled with red-brown, the marbling so arranged as to leave a stripe of 

 the ground colour extending along the body below tubercle II, giving the 

 appearance of a subdorsal line. A series of white patches, more or less 

 evident dorsally, situated between tubercles IL Thoracic plate tends to 

 break up into two anterior mounds and a single transverse posterior one, 

 the former each containing about 7 black setae, inclined forward over the 

 head, the latter with 4 long straight black setae and two white ones, ar- 

 ranged three on each side of the central dorsal line. On the prothorax 

 the small tubercle behind the plate contains two white setae ; the large 

 tubercle anterior to the spiracle 6 black setae and i white one, situated 

 anteriorly ; the lateral tubercle bears 3 white setje. On the meso- and 

 metathorax tubercle I and II contains 8-9 black setae and i small anterior 

 white seta inclined forward ; tubercle III bears two long black setae, a 

 small white one on the anterior margin and a similar one on the posterior 

 portion ; tubercle IV is small with two white setae ; tubercle V bears 7 

 setae, of which on the mesothorax 3 are black and 4 white, on the meta- 

 thorax 2 black and 5 white, the posterior black one having changed 

 colour; tubercle VII bears 6 white hairs. On the abdominal segments 

 tubercle I is minute, bearing a short white seta, II has a small white seta 

 on anterior margin inclined forward and a long central black seta sur- 

 rounded by a ring of 5 others ; there are usually 2 small white setae on 

 anterior margin of III and one on posterior portion, and further 5 long 

 black setae arising out of the central area ; tubercles IV and V contain 

 each 4-5 tine white setae ; tubercle VII is small, on leg-bearing segments 

 with three small white hairs, on others with but one or two set^, absent 

 on 9th abdominal ; the large tubercle of this segment bears about 12 black 

 setae, of which the central one is longest and points backward ; further 

 there are about 5 small white hairs around outer margin. The anal plate 

 is small, heart-shaped with about 12 minute hairs, both black and white, 

 situated mostly towards the posterior margin. All black setae are strongly 

 barbed. Legs black. Length, 6 mm. 



