144 MR. A. D. MICHAEL ON UNRECORDED 



they approach closest to it than at the lateral margin. Genital opening large 

 and almost round, but truncated at the posterior end ; its anterior end is 

 opposite about the centres of the coxse o£ the fourth pair of legs. Anal 

 opening large, only divided from the genital by a thick chitinous ridge ; it is 

 almost triangular, but has curved sides, convex outward. The anal plates are 

 long and narrow, and there is a second pair of chitinous sclerites resembling 

 them nearer the lateral edge of, but still within, the anal opening. There is 

 a division of, or split in the chitin of, the ventral surface running from the 

 coxa of the fourth leg to the antero-lateral corner of the anal opening on each 

 side of the body. 



Nymph. This stage would easily be recognized from the adult ; it is of 

 course far less chitinized and has monodactyle claws. It has the apophyses 

 on the edge of the notogaster much lighter and less chitinized, but also much 

 larger and longer than those of the adult, and the hairs which they bear 

 are much longer ; there are also three additional pairs of these apophyses and 

 hairs along the anterior part of the lateral edges of the notogaster, which 

 make the nymph somewhat resemble the European species JSothrus spiniger. 



HaWtat. Several specimens from the Ruahine Range, Fielding, and 

 Maunga Karetu. 



NOTHRUS IJNGUIFERA *, sp. n. 



This species so closely resembles iV. copliinarius that it may easily be 

 mistaken for it, and it seems unnecessary to fully describe it ; the principal 

 differences from N. copliinarius are : — 



1. The greater length of the body. 



2. The smaller comparative breadth of the notogaster only, and the greater 

 bulging of the side of the abdomen. 



3. The fact that the posterior part of the lateral edge of the abdomen is 

 convex, not concave. 



4. That the notogaster is divided into three longitudinal strips of which 

 the median is as wide as the two lateral and is plain, while the two lateral are 

 strongly dotted or granular. 



5. That the apophysis at the postero-lateral angle of the notogaster is much 

 smaller and is slightly bulbous at the distal end, and that the adjoining one is 

 attached to it, and that there are not any other apophyses on the notogaster. 



* Unguis, a claw ; fero, I bear. 



