84 



N. S. ENTOMOLOGICAL SOCIETY 



to the twig <m which they have been feeding, then throw them- 

 selves back, spinning out a silken thread as they go, until they 

 have reached an angle which compares with that of the adja- 

 cent twigs and fruit spurs, holding to the main twig by the hind 

 claspers only. In the later larval stages they even become 

 the color and have lenticel-like markings resembling the bark 

 of a twig, making it almost impossible to detect the insect 

 when at rest. 



Description^ Instars. 



First Instar. Head, dark brown in color, mouth parts of 

 a lighter shade, clypeus and antennae whitish. A longitudinal 

 dorsal and ventral stripe, reddish brown. The lateral surface 

 is white. Short setae scattered sparsely over the entire body. 

 General body color brownish. Larvae when first hatched 2.4 

 m. m.-2.7 m. m. in length. Head, .35 m. m.-.38 m. m. wide. 



Second Instar. Mouth parts dark brown. The dorsal 

 and ventral stripes, also the white lateral surface of previous 

 instar have disappeared. Body covered with short scattering 

 setae. General body color dull black. Length after first 

 moult 4 m. m.- 6 m. m. Head, 712 m. m.-.75 m. m. wide. 

 Otherwise similar to preceding instar. 



Third Instar. Entire body unicolorous, dark shining 

 bronze to black. Length after second moult, 10 m. m.-15 m. 

 m. Head, 1.14 m. m.-1.2 m. m. wide. Otherwise similar to 

 preceding instar. 



Fourth Instar. Head with scattering setae. Epicranium 

 full and rounded. On the dorsal surface of the second thoracic 

 segment a hump appears bearing a transverse row of yellowisl 

 warts which become concolorous with the body shortly after 

 moulting. Situated on the dorsum, where the fourth and fifth 

 abdominal segments meet, are two large warts which project 

 laterad. In addition there is a transverse row of warts, similar 

 to those on the second thoracic, on the dorsum where the 

 leg claspers and anal plate joins the body. Prolegs with hooks 

 of equal length with the series interrupted in the middle. The 

 entire body is covered with lenticel-like markings which gives 

 the insect the appearance of a twig when at rest. General 

 body color, greyish brown when freshly moulted, becoming 

 more unicolorous later. Length after third moult has been 

 cast, 17 m. m.-25 m. m. Head, 1.89 m. m.-1.93 m.m. wide. 



Fifth Instar. Body unicolorous ashy brown. Length 

 after freshly moulting, 30 m. m.-32 m. m. Head, 2.9 m. m.-3.0 



