L60 / ran suctions. — Zvoiogij. 



small and transversely elliptical, and is produced below and in 

 front of the eyes into small rounded projections. Last six seg- 

 ments of thorax of about equal lengths, and shorter than the 

 first ; last three with the postero -lateral angles acute, produced. 

 Abdomen mucn narrower than the thorax, and narrowing 

 considerably posteriorly ; lateral margins nearly straight ; last 

 segment subtriangular, with apex truncate ; posterior margin, 

 and the posterior portions of the lateral margins, perfectly 

 straight. Surface smooth and shining, iipparently with very 

 short setae at intervals. Colour, mostly black, or very dark 

 brown, with markings of light yellow or white. 



Inner antenna small, but able to be seen in dorsal view. 

 Outer antenna, with the first three joints increasing in length ; 

 third, as long as the first and second together ; fourth, half as long 

 again as the third, and about three-fourths as long as the fifth. 

 Third stouter than the fourth, which is stouter than the fifth. 

 Flagellum as long as the fifth joint, and tapering gradually ; 

 clearly divided into five joints, and the last, which is longer than 

 any of the others, bears indistinct marks as if divided into two, 

 the extremity bearing a pencil of straight setae. Whole antenna, 

 thickly covered with very fine seta?, and having larger seta? at 

 the distal ends of the second, third, and fourth joints. Thoracic 

 legs, increasing considerably in length posteriorly, bearing many 

 long, stiff seta?, particularly on the carpus, near the distal end 

 of which the longest is situated. Dactylos bearing a peculiar 

 seta longer than the dactylos itself ; it is stout at base, and soon 

 splits up into two branches of about equal size ; the branch 

 remote from the dactylos giving off numerous sub-branches on 

 the side near the dactylos ; the other branch splitting into 

 several branches, which still further subdivide towards the end. 

 Posterior pleopoda rather large, two-thirds as long as the 

 abdomen ; inner ramus articulated to the inner margin of the 

 peduncle anteriorly to the outer ramus, slender, and about 

 three-fourths as long as outer ramus, which narrows rapidly 

 towards the extremity ; both bear a few seta? at the end, and 

 are thickly covered with very short seta?. 



Length : - 8 inch. 



Hab. — Spar bush, Southland. 



I have named this species after Mr. G. M. Thomson, from 

 whom I have received much kind assistance. 



In general appearance, and in the form of the outer antenna, 

 it differs considerably from the species common in many parts 

 of the South Island, which I have previously identified with 

 Philygria rosea, and it is much larger than the ordinary speci- 

 mens of this species ; though I have one specimen of P. rosea 

 from Kinloch, Lake Wakatipu, quite as large as any of my 

 specimens of I', thomsoni. In some details, however, I find the 

 two are strikingly alike. This is particularly the case with the 



