4U2 TIIK CANADIAN" KNTOMOI.lHilHT. 



position of iii is occupied by a very minute tubercle, whilst venirad and 

 posterior to this a ttibercle corresponding in size to iii of otiier nbdoniinal 

 segments is present, preceded on the anterior margin by another minute 

 tubercle. Anal plate hcartshai)ed, bordered with several seta-bearing 

 tubercles. Legs black. Prolegs with prominent lateral chilinous plate, 

 especially well developed on anal claspers. I^ength. 3 mm 



Stage II. — Head red, oval, the lobes extending dorsaliy mucii abnvc 

 the clypeus. which is quite small. IJetween the lobes is a distinct suture ; 

 width of head, 1.5 mm. Body cylindrical, olive brown, turning later red 

 brown ; skin granulated ; all tubercles and spines shiny black ; cervical 

 plate usually, anal plate always black. The mesothoracic spine is now 

 2.3 mm. long and covered with minute bristles, the apex is slightly bifur- 

 cate, but the long setae of previous stage are lacking. Tubercle i is 

 represented by a double row of short conical, sharply-pointed spines along 

 the dorsum, ending with a single one on the 9th abdominal segment; of 

 these the pair on the metat'.iorax are slightly larger than the others. 

 Tubercle ii is very minute and scarcely visible; other tubercles conical, 

 smaller than i. Spiracle round, black ; anal piate, legs and prolegs as in 

 preceding stage. Length, 9 mm. 



Stage III. — Head orange-red, with fine network of darker lines, 

 sparsely covered with very minute setje Width, 2.3 mm. Body biick 

 red ; skin granulated, with a well developed lateral fold ; cervical plate 

 black, well defined, with the four tubercles of previous stages and 

 numerous other minute black granules. Mesothoracic spine slightly 

 recurved, 5.5 mm. long, covered with short secijndary spines ; the dorsal 

 rows of spines are also slightly spiculate near their bases ; tubercle ii has 

 now practically disappeared, and can scarcely be di5tingui.-»hed from the 

 granulations ; other spines short, conical, slightly spiculate ; dorsal spine 

 of 9ih abdominal very prominent ; anal plate fringed laterally by row of 

 .spines ; spiracles oval, black, with small central slit. Prolegs with several 

 minute black tubercles on the upper portion and black lateral plate, which 

 is much reduced on anal claspers, being restricted to small patch on 

 anteiior margin. Length, 19 mm. 



Stnge IV. — Head as in previous stage, with deep furrow between 

 lobes; width, 3.2 mm. Body brick red, granul.ite. The cervical and anal 

 ))lates are no longer black, but of same colour as body, and not very 

 apparent. In late stages traces of a yellow subdorsal stripe, situated 

 laterad of tubercle i, and yelhiw patches about spiracles, are present. 

 Mesothoracic spine S mm. long, strongly spiculate ; other spines as in 



