CAMBRIDGE.— On the Spiders of New Zealand. 203 
Canterbury, New Zealand, several years ago, and kindly given me by Dr. 
Ll Powell, of Christchurch, N.Z. In a subsequent collection from Waikato, 
N.Z., kindly sent by Captain Hutton, there were one or two others (females 
also) of the same species. Upon one of these (a very small example) the 
above new genus was founded by Dr. L. Koch, to whom I had transmitted 
the specimen for examination. More recently still, Captain Hutton has 
forwarded me an adult male and female of it found by Mr. H. H. Travers at 
the Chatham Islands, N.Z. The adult male nearly resembles the female in 
colours and markings, but is very much larger than either of the females I 
have yet seen, and differs from them notably in the development of the falces; 
in fact, the whole spider affords such a good example of the different points of 
detail in the general structure of the Araneidea, that I have decided to figure 
it in the present instance for the purpose of illustrating the structural features 
of spiders remarked upon in the previous pages. 
With regard to the genus Cambridgea, founded upon this species by 
Dr. L. Koch, I was at first rather doubtful myself as to its distinctness from 
Argyroneta, Latr. ; as, however, that able author still adheres to his opinion on 
the point, I have given this spider here under the generic name which he has 
done me the honour to confer upon it, though not having myself yet been able 
to compare it critically with Argyroneta. The following are the measurements 
of the different examples that have as yet come under my notice :— 
Female adult (type of genus and species), Waikato, N.Z. ; length, 3°5 lines. 
а. и 3 Waikato ; length, 5 lines. 
» я ^ $5 Canterbury ; length, 7 lines. 
3 » p » Chatham Is. ; length, 8:5 lines. 
Male adult $5 " = Chatham Is. ; length, 10-5 lines. 
This great variation in size is also a strong character in the genus 
Argyroneta ; as also are the development of the falces in the male, and the 
existence of the supernumerary spiracular orifices indicated in f. 2¢t., and 
f. 3p. i 
The following is a detailed description of the male :— 
Cephalo-thorax oval, moderately convex above, constricted laterally forwards, 
and rather truncate at its fore extremity ; it is of a light reddish-yellow brown 
colour, with a broad lateral band of a much deeper hue on either side, and also 
a similar longitudinal central one, divided almost throughout its length by a 
fine light reddish-yellow line. The height of the clypeus, which is nearly 
vertical, is less than half the facial space ; the surface of the cephalo-thorax is 
thinly clothed with fine adpressed light-coloured hairs, with a few prominent 
bristles in the ocular region. 
The Eyes are of tolerable size, but scarcely differing from each other in that 
