Watt. — Study of New Zealand Entomology. 



251 



suture. The posterior portion of the cheek bears a conspicuous black 

 streak extending from the top of the head to just above the eyes. In the 

 and meta-thorax the scutellum is not at all distinct, the surface 



meso- 



and colouring practically same as rest of body, neither chitinous nor horny. 

 Spiracles as in stadium 1. In the prothorax tubercle i is beneath but a 

 good way in front of ii. A subprimary tubercle is situated above and 

 in front of ii, and a second in front and above i. hi consists now of a 

 small single-hair-bearing tubercle, the second hair having separated and 

 become a subprimary posterior to and slightly below iii. vi has also got 

 rid of its second seta, which is subprimary and immediately in front. In 

 the 2nd and 3rd thoracic segments a very minute subprimary tubercle 

 appears immediately beneath and close to v. Tubercle iv has now made 

 its appearance in the meso- and meta-thorax, and is situated behind v 

 and iii, immediately below i. In the first four abdominals a second small 

 subprimary has appeared anterior to viii and above vii. Tubercles vii 

 and viii are now separated in the 3rd and 4th abdominals, and no longer 

 form the single triangular group with the subprimary. vii is now present 

 as a single small tubercle on the upper anterior portion of the proleg in 

 the 5th and 6th abdominal segments, vi appears in the abdominals, 

 being placed between iv and vii, but below v. 3rd stadium : Duration, 

 7th April to 12th April, six days. Length immediately after second moult, 

 in. The 8th abdominal segment bears a posterior dorsal hump. Body 



16 



tapering from 8th abdominal segment to the head ; colour green. \ In 

 addition to the dark-green medio-dorsal stripe, 2 subdorsal stripes appear, 

 one on either side of the dorsal one, and 

 each consisting of two narrow white lines, 

 the upper one slightly the broader. There 

 is an exceedingly fine white spiracular line. 

 The ventral surface of the body, together with 

 the prolegs, is a light green. The true legs, 

 eyes, and tubercles remain black. In the 

 prothorax tubercle v has got rid of the second 

 hair, which now forms a small subprimary 

 tubercle immediately beneath it. Crochets 

 on prolegs arranged in semicircle. 4th sta- 

 dium : Duration, 13th April to 17th April, 

 five days. Length after third moult, ^ in. 

 Spiracles oval. The lower belt of the double -p IG j) .p ro thorax : 3rd instar 



(note tubercle v, and com- 

 pare with 2nd instar). 



subdorsal stripes runs below tubercle ii, while 

 t lie other and broader belt runs level with 

 it, but is indented so as not to enclose 



tubercle i. 5th stadium : Duration, 18th April to 22nd April, five days. 

 Length after the fourth moult, f in. A third narrow white stripe is now 

 added to the subdorsal lines and runs above tubercle i, so that now 

 tubercles i and ii are situated in the intervals between the three sub- 

 dorsal lines. There is a broad supraspiracular line of dark-green fading 

 to the natural body-colour towards the anal end. Tubercle ii is white 

 in the last nine abdominal segments, vi is white in the 3rd to the 9th 

 abdominals inclusive, and v is white in the last abdominal. The tubercles 

 on the suranal plate are white. There is a certain amount of slight 

 variation in the colouring at this stage, but this is dealt with in full in a 

 later pargraph. The sexes can now for the first time be distinguished, 

 but this is also dealt with in the paragraph above referred to. Numerous 



