AUSTRALIxkN OriLIO]S'ES. 



45 



are rather bright yellow. The legs ashy grey. The under side 

 is yellow from the front as far as the rear coxse ; dark brown 

 behind this on the sterna, which are bordered with paler edging. 

 Two specimens, which I take to be females, are ashy grey above 

 with pale gi'ey spines and almost wholly yellow underneath, being 

 there grey only at the extreme end ; on the npper side there is a 

 distinct rhomboidal pattern in pale grey on a dark ground. 



The cephalic part of the carapace is thickly covered with coarse 

 granulations ; it is bounded posteriorly by a distinct depression 

 separating it from the abdominal portion. The front border has 

 one long median spine, flanked on each side by five smaller 

 spines. The eye-tubercle takes its rise at a point well behind 

 tlie front margin ; it is roughly hemispherical, with the eyes 

 looking upwards, and a median horn about equal to the height 

 of the basal part on which it stands. Behind the sulcus above 

 mentioned the granulations form themselves more into longi- 

 tudinal and transverse rows, but without achieving any very 

 definite pattern. About midway between the dividing sulcus 

 and the rear end are a pair of rather large spinous tubercles, and 

 behind these four more, of which the middle two are the largest. 



The rear segments have regular rows of spinous tubercles, 

 about ten on front row to four on the back row. 



The basal joint of the mandibles is thick and bulges upwards. 

 On the basal part of the second joint are several spinous 

 tubercles. 



The^JttZpi are thick and powerfully bespined on all joints. In 

 length they just equal the body. Those of the supposed female 

 ai-e slighter and less strongly armed. 



The legs are covered with spinous granules as far as the tibial 

 joint, and the spaces between the trochanters of ii. and iii., and 

 lii. and iv. are armed with three or four spinous tubercles. On 

 the 4laws of tarsi iii. and iv. are two quite sniall side wings 

 inserted about the middle of the claw. 



I have little doubt about the sexes, but on removing the oper- 

 culum of one supposed male, there was nothing at the bottom of 

 a deep hollow but a granular mass. 



The measurements (in millimetres) are as follows : — 



Ceph. Ig. 1^, lat. 2| ; abd. Ig. 3^, lat. 3| ; mand. 2| ; palpus 5 ; 

 1st leg 7], 2nd 144, 3rd 11, 4th 13. 



These are three males and two females from Mt. Algidus, 

 Kaka.ia Gorge, South Island, N.Z. 



MONOXYOMMA TRAILLI, sp. n. (PI. III. figs. 12 a-f.) 



Colour. Male : a black-brown border along the front edge of 

 the cai-apace, along the sides, and the same colour over the I'ear 

 segments; in the median area there is a large yellowish patch. 

 On the segments large, round faint yellow spots in transverse 

 rows. The mandibles are yellow, with a black network pattern 



