266 Transactions. 



specialized cells of the dorsum, it seems possible that the gills and discs 

 are connected by a system of air-tubes relating to suction alone, and that 

 the opening and closing of the disc is aided by the use of the valve-gateway 

 at the anterior margin of the disc. The mechanics of the disc action, 

 however, need further research. 



Pupae. 



Bezzi (1913, p. 80) describes the pupae as " oval in shape, convex and 

 strongly chitinized dorsally, where the colour is black, and flat and whitish 

 ventrally. The prothoracic respiratory appendages project forward in the 

 form of two horns, enclosing the delicate respiratory organs." The following 

 notes can be added : When examined under a high power the black dots 

 resolve into small brown raised bosses (fig. 150). Dark markings appear 

 at the lateral margins, where they curl over to form the rim of the cradle 

 for the enclosed occupant (figs. 147 and 149). A group of light-brown spots 

 appears on each segment, half-way between the centre and the margin, 

 but these are only visible on slide specimens (fig. 149). Each respiratory 

 appendage consists of 4 plates. 



The presence of Blepharocerid larvae in the vicinity of Dunedin and 

 Queenstown brings the area of distribution considerably farther south 

 than the 40° mentioned by Bezzi (1913, p. 71). Dunedin is nearly 46° S 

 latitude. Altitudes : Dunedin, about 600 ft. ; Queenstown, 2,000 ft. ; 

 Arthur's Pass, Otira, from 1,260 ft.; Ohakune, 2,018 ft.; Purau, about 

 sea-level. 



I have to express my keen appreciation of the kindly interest taken in 

 my work by Dr. Chilton, Mr. Gilbert Archey, and many other friends, and 

 of the valuable help they have given me in my attempt to increase, however 

 slightly, our knowledge of the New Zealand representatives of this family. 



Literature cited. 



Bezzi, M., 1913. Bull. Soc. Ent. Ital, vol. 44, pp. 1-113. 



1914. Ibid., vol. 45, pp. 115-29. 



Chilton, C, 1906. Trails. N.Z. Inst., vol. 38, pp. 277-78, pi. 46. 



Edwards, F. W., 1915. Ann. Mag. Nat. Hist., ser. 8, vol. 16, pp. 203-15, figs. 1-22. 



Lamb, C. G., 1913. Trans. N.Z. Inst., vol. 45, pp. 70-75, figs. 1-9. 



Note. 



_ In regard to my enumeration of the wing- veins, Dr. Tillyard has kindly 

 pointed out the improbability of any fusion of B and M in the Blepharo- 

 cerida.e. The error is mine, and bears no relation to the evidence for 

 wing-reduction in New Zealand forms. 



