Watt. — Study of New Zealand Entomology. 249 



within the intestine. The alimentary canal is dark on account of the 

 foodstuff within, and gives the larva the appearance of possessing a dark 

 medio-dorsal stripe. The body is cylindrical, the 5th, 6th, and 10th 

 abdominal segments bearing prolegs which are well developed ; the crochets 

 in each are arranged in an almost complete circle. Spiracles small, 

 circular, brown, very inconspicuous. Trachial tubes white and easily seen. 

 The body is clothed with a minute pile, the individual hairs of which 

 are short and bristle-like, and appear to be black-tipped, but require a 

 quarter-inch objective to be distinguished. It appears as though the 

 membrane between the segments were more thinly clothed than the rest 

 of the body, if not entirely smooth. The tubercles are all very conspicuous, 

 and bear simple hairs. The head is well rounded and of medium size. 

 The clypeus and portion between it and the cheeks seems slightly lighter 

 in colour. Mouth parts brownish. Eyes conspicuous. Four fairly long 

 hairs are placed on either cheek between the eyes and clypeus, the two 

 uppermost being situated just below and at either end of the central facial 

 suture, the remaining two are below and slightly anterior to these ; the 

 area within the eyes bears 3 smaller hairs in triangular formation, and 

 an 8th verv minute one is situated directly beneath the 5th eye. There 

 appears to be ontogenetic relationship existing between these and the 

 primary tubercles on the thoracic and abdominal segments. A black 

 chitinous dorsal shield is present on the prothorax ; it is trapezoidal in 

 form, the anterior margin being of greater width than the posterior one. 

 The front portion of the shield carries 4 long hairs directed out over the 

 head, and 4 smaller similarly directed hairs rise from the hinder portion. 

 Excepting a slight swelling of the dorsal portions of the last two thoracic 

 segments above the general surface of the skin, there is no evidence of any 

 meso- or meta-thoracic shield. The 3rd thoracic and 1st, 5th, and 7th 

 abdominal segments are each divided into two subsegments, the posterior 

 subsegment in the last thoracic and 1st abdominal segments being the 

 greater and bearing the primary tubercles. The subsegments of the 5th 

 abdominal are separated by a diagonal suture directed from above 

 anteriorly, the anterior subsegment being the greater and bearing the 

 tubercles. The posterior subsegment of the 7th abdominal is very narrow, 

 but bears tubercles i and iv. The spiracles are situated laterally, slightly 

 below and slightly anterior to the central portion of the segments, but 

 in the 1st thoracic near the hind margin. Tubercle i is included in the 

 prothoracic shield, but is placed beneath ii in the meso- and meta-thorax, 

 being shifted above in the abdominal segments. In the 2nd and 3rd 

 thoracic segments ii is very minute, more so in the meta- than in the meso- 

 thorax, and is also included in the dorsal scutum of the prothorax. A 

 small subprimary tubercle is situated between i and iii in the meso- and 

 meta-thorax. Tubercle iii is well developed, and surrounded by a pigmented 

 area, greatest in the 1st abdominal. It bears a single stout hair, except 

 in the prothorax, where it consists of 2 hairs, fairly minute. Tubercle iii 

 is pre-spiracular, except in the 1st abdominal, where it is post-spiracular ; 

 in the other abdominal segments is immediately beneath i, and in the 

 prothorax beneath the posterior margin of the scutum, v is a small single- 

 haired tubercle, subspiracular but anterior . to iii; in the prothorax it is 

 greatly enlarged, is supraspiracular, anterior to iii, and bears a minute 

 secondary hair at its base, iv is absent in the thoracic segments, but is 

 post-spiracular in the abdominals and above v, and slightly subspiracular. 

 vi is a large two-haired tubercle on the prothorax, but on the meso- and 



