071 Hyule grenfelli, Chilton. 273 



witli one another nor witli the sex, no structural difference is 

 apparent. Now tlie thoracic dorsum varies greatly ; of tlie 

 seven males, one is clear red (typical rufa), one has side-lines 

 just in front of the scutellum, one has side-lines complete but 

 no middle one (tliis is typical macrogramma by comparison 

 with Speiser's full description), one lias side-lines and a faint 

 middle one in front, one has all these lines well marked, one 

 has all the lines broad and even confluent at the middle of 

 the disc, and anotiier has the lines reddisli but a little dark 

 behind. Of tiie four females, one is quite immaculate, one 

 has only the faintest trace of the lines in red, one has the 

 lines all present but faint, the last has all present and very 

 strong. The author is quite sure that Speiser's macro- 

 graniina is a dark-lined form of rvfa. As regards the two 

 species of Loevv (j-vfa and lateralis), some doubt may arise. 

 Loevv evidently had single specimens only (i-ufa is described 

 from a ? , lateralis from a ^ ; see B. E. Z. 1874, xliv. 

 p. 194). The main difference appears to be dark flecks in 

 the antennal pits in the latter species and (possibly) less 

 hairy arista. It is impossible to be sure of the true distinct- 

 ness of these three species, and hence the author considers all 

 the red Loxoceras with entirely black third joint to be L. rufa^ 

 Loew. 



8. Rhodesia: Salisbury and Chirinda Forest {G. A. K. 

 Marshall, Camb. Coll.). Natal : Durban {F. J/u«V, Gamb. 

 Coll.). 



XXI. — Further JSotes on the New Zealand Amphipod Hyale 

 grenfelli, Chilton. 13y Chas. Chilton, M.A., D.Sc, 

 M.B., CM., LL.D., e;.M.Z.S., Professor of Biology, 

 Canterbury College, New Zealand. 



In May 1916 ^ I described a new species of Amphipod from 

 New Zealand, naming it Hyale grenfelli. Tlie type-specimen, 

 which was the only specimen at that time known, was a 

 male, and was ciiaracterized by the peculiar shape of the 

 second gnathopod and by the great dilatation and setose 

 character of the terminal joints ot the maxillipeds. I pointed 

 out that it was quite likely that this peculiar development of 



* Ann. & Mag. Nat. Hist. ser. 8, vol. xvii, p. 362. 



