40 MR. H. R. HOGG ON SOME 



ventral surface the oral segment of coxa ii. is well developed, 

 pointing prominently forward, but is fiat and does not stand np 

 fi'om the siirface ; the mouth-parts, on the other hand, of coxa i. 

 and the palpal coxa stand up well above the surface-level. 



The mandibles are smooth, the basal segment Ij times as long 

 as wide, with two small spines on the inner side of the anterior 

 end. The paljn robust, the trochanter with three spines under- 

 neath, in front, on the outer side ; three powerful spines under 

 the femur ; two small spines under the patella ; thi-ee long spines 

 on each side underneath the tibia; three small spines on each 

 side and a large tei'minal spine on the distal joint. 



The extended sheath of the male penis is bilobed, the penis 

 itself terminated by fine bristles. 



The coxae of the anterior three legs are corrugated and 

 tubercled, that of the 4th pair smooth. 



In the female the sternum between the third pair of coxpe is 

 corrugated and narrow. 



The measurements (in millimetres) are as follows : — 



Ceph. Ig. 2. lat. 3; abd. Ig. 4, lat. 4 ; palpus ^h ', 1st leg 11, 

 2nd 14, 3rd n, 4th 13. 



One male and four females were collected \>y Dr. Cockayne 

 from Kapiti Island, off the S.W. coast of the North Island of jN'ew 

 Zealand. 



Tri^nonyx variegata, sp. n. (PI. II. figs. 8 a-c.) 



Colour. Female : pale greyish yellow, with dark brown rect- 

 a,ngular pattern reaching from the eye-tubercle to the first I'ear 

 segment, also a smaller and lighter coloured similar rectangle 

 reaching from behind the eye-tubercle to the posterior end of the 

 cephalic part, and transverse rows of yellow spots round on the 

 carapace, oval on the segments ; the under side is pale all over. 

 The legs are pale yellow, banded with dark grey; the mandibles, 

 and femoral and tibial joints of palpi are deep black, speckled 

 with small yellow spots. The eye-tubercle yellow-grey in tlie 

 middle, dark grey at the sides ; eyes orange. 



The dorsal stcrface is smooth but coi'iaceous, the spots thereon 

 flat, with short bristles, but the segmental spots slightly raised. 

 The marginal eye-tubercle, rather high and conical, has a wide 

 circular base, narrowing to a blunt point anteriorly, but there is 

 nothing either spinous or tubercular about it. The eyes are at 

 the side. There are no spines on an}' pai't of the carapace. 



The mandibles are smooth, without tubercles, the first segment 

 about twice as long as wide. 



The ^9a?jo^ are rather slight, the usual spines on the under side 

 little more than low tubercles, and none on the upper side. 



The sternum between the 3rd pair of coxse is wide and corrugated, 

 in the male, with an upper and lower division, and above this a 

 rectangular lip between the prominent oral parts of coxpe i. The 

 oral portions of coxse ii. are hardly formed at all and in no wise 

 raised. 



