A. W. Rymer Roberts 313 



of the sternite which Ues posterior to the setae bears a few shallow 

 punctures and rugae only. 



The spiracles (Plate XIII, fig. Id) differ from those of A. obscunis 

 in being actually longer (in spite of the smaller size of the larva) and also 

 in being longer in proportion to their breadth. Their sides also are more 

 nearly parallel, the spiracles of A. obscurus being widened more con- 

 siderably anteriorly. Length of the first abdominal spiracle about 

 •137 mm. and maximum breadth about -056 mm., while in the larger 

 larva of A. obscurus the corresponding measurements are -125 mm. and 

 •085 mm. As might be expected the number of teeth or corrugations on 

 either side of the spiracular orifices is also somewhat greater, numbering 

 about 51 in the thoracic and 45 in the abdominal spiracles. Malformation 

 of single spiracles occurs occasionally. Mr Terzi's figure (Plate XIII, 

 fig. le) clearly shows the nature of the malformation in one specimen 

 while another similar one has also been met with. 



Cauda short and generally not very acute : on the average it appears 

 to be slightly sharper than that of obscurus. 



Apart from the points set out above the description of A. obscurus 

 in the late larval stages would serve equally well for this species. 

 As will have been observed, the most salient differences between the 

 two species, apart from size, rest in the sculpture of the cuticle and in 

 the shape of the spiracles. The following comparative table shows the 

 nature of the principal distinctions : 



A. obscurus. 



Tergites nearly smooth, glossy: bearing 

 shallow furrows, chiefly longitudinal, of 

 variable length : punctures sparse and shal- 

 low. 



Area anterior to spiracles, both dorsally 

 and ventrally, almost smooth. 



Tergite of 9th abdominal segment almost 

 smooth, but bearing a number of shallow 

 furrows irregularly disposed: a few shallow 

 punctures towards the apex. 



Spiracles shorter, widest at anterior end. 



A. sputator. 

 Tergites rather rugose, dull: rugosities 

 irregular, frequently transverse: punctures 

 more numerous, wider and deeper. 



Area anterior to spiracles, dorsally and 

 ventrally, finely granulate. 



Tergite of !)tii abdominal segment slightly 

 rugose and punctulate: finely granulate 

 anterior to sensory pits. 



Spiracles long and narrow; scarcely wider 

 at anterior end. 



Pupa. 



In general the pupa resembles that of A. obscurus, but is smaller, 

 has the prothorax more elongate and differs in several other characters 

 to be specified below. 



In length it is about 8 mm. with a breadth of about 2-5 mm. across 

 the thorax. The anterior thoracic spines are attached just above the 



