48 N. S. ENTOMOLOGICAL SOCIETY 



Description of Stages. 



First Instar. Rather long and narrow, widest at second 

 abdominal segment. Lengthwise of the body are four rows 

 of large, black tubercles; subdorsal, supraspiracular, subspir- 

 acular and pedal. All are wanting on the anal segment, while 

 the supraspiracular is absent on the thoracic segments. 

 There is also a larger, flattened, black tubercle on the lateral 

 margins of the thoracic segments, those on the meso and me- 

 tathorax being the largest. Each tubercle is surmounted by a 

 short, black spine, except the larger ones on the thorax which 

 have two. 



Legs, corneus, 5-jointed, the margins bearing a few short 

 hairs, and the tarsi terminated by a hooked claw. 



Color, dark brown, prothoracic shield almost black and 

 anal segment lighter. Head, antennae and mandibles, black. 

 Legs, black, except the trochanter, which is dark brown. 



Length of body, L35 m. m. — 1.43 m. m. Greatest width 

 .567 m. m. — .612 m. m. Width of prothoracic segment, .513— 

 .540 m. m. Width of head .405 m. m.-.459 m. m. 



Second Instar. With the exception of size and an addi- 

 tional row of small, flat, black dots, one on each of the abdomin- 

 al segments, between the subdorsal and supraspiracular rows 

 of tubercles, this stage is similar to the preceding one. 



Length of body, 2.70 m. m. — 2.78 m. m. Greatest width 1.26 

 m. m. — 1.35 m. m. Width of prothoracic segment 1.17m.m. — 

 1.21 m. m. Width of head .945 m. m. — .999 m. m. 



Third Instar. General appearance practically the same 

 as the first, the difference being very slight. In addition to 

 size and color, there is an extra subdorsal tubercle on the meso 

 and metathorax. 



Color, light brown, with a faint black line lengthwise of 

 the dorsum, and a wide broken one on the lateral margins, 

 covering the supraspiracular tubercles, also the larger ones on 

 the meso and metathorax, but leaving the segmental margins 

 lighter. Head, legs and thoracic shield, black. 



Length of body, 4.59 m. m. — 4.67 m. m. Greatest width 

 1.83 m. m.-1.89 m. m. Width of prothoracic shield 1 26 m. m. 

 1.35 m. m. Width of head 1.08 m. m. — 1.17 m. m. 



