Cambridge.^O/* the Spiders of Neio Zealand. 203 



Canterbury, ]!^ew Zealand, several years ago, and kindly given me by Dr. 

 LI. Powell, of Chiistchurcli, N.Z. In a subseqiient 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 Camhridgea, founded upon this species by 

 Dr. L. Koch, I "Vi^as 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. 



„ „ „ „ Waikato ; length, 5 lines. 



„ ,, „ ., Canterbury ; length, 7 lines. 



„ ,, „ ,, Chatham Is. ; length, 8 -5 lines. 



Male adult „ „ „ 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. 2tt., and 

 f. 3p. 



The following is a detailed description of the male : — 



C ephalo-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 sui-face 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 



