272 THE CANADIAN ENTOMOLOGIST 



show a considerable augmentation of seta?, of which a single black 

 central one from each dorsal tubercle is very long, the individual 

 setae thus forming a double dorsal row, the hairs increasing in 

 length towards the anal segments where they are pointed rear- 

 wards and tend to become white in the upper half; the central 

 seta of tubercle III is almost as long and these form a similar 

 lateral row pointing sidewards. Besides these long black setae on 

 the meso- and metathorax tubercle I has 3 shorter black setae 

 and several minute white ones; tubercle III has three white setae; 

 tubercle IV of the previous stage is only represented by a faint 

 chitinous patch, but immediately below it and posterior to V is a 

 minute white seta; tubereles V and YII have each about 5 white 

 seta?. On the prothorax the prothoracic plate has the setae on 

 the anterior margin arranged in two groups, each containing four 

 black setae, pointing forwards, and several shorter white ones; 

 the seta? of the posterior margin are as in the preceding stage 

 with the addition of two minute white ones behind the two central 

 black seta?. Behind the corner of the plate are two small white 

 setae; the lateral tubercle on the anterior margin is large with 

 two long black setae and 4 or 5 short white ones, laterad to this is a 

 tubercle with one central black and 4 white setae. 



On the abdominal segments tubercle I has a single short white 

 seta, tubercle II 5 black seta? grouped around the long central one, 

 with occasional white setae intermingled; tubercle III with a longer 

 black seta and 5 short white ones which tend to become blackish 

 on the rear segments; the other lateral tubercles with about 4 or 5 

 white setae each. 



Stcii^e III. — Head as before. Body with dorsal area lilack, 

 shading into paler laterally, with velvety black patches on anterior 

 dorsal portion of each segment and along edge of centro-dorsal 

 stripe which is broad and whitish-yellow; subdorsal stripe as 

 before, but tending to break up into spots; lateral area browner 

 than the dorsal area, mottled with ochreous around base of tubercle 

 III and with pale subspiracular band as before. 



Prothoracic plate with two well marked anterior warts each 

 containing numerous long black and shorter white setae pointed 

 forwards; the posterior row of seta? consists of 4 black ones with 



