304 Transactions. — Zoology. 



open (but not far from being closed). The transverse nervure 

 unites with the external cubital branch far from the point of 

 separation. 



In aspect this genus resembles, even to confounding, the 

 genera Mijrmica and Aj^hcenogaster, from which it differs by 

 the antennae of 11 joints and the wings. A close examina- 

 tion, however, reveals closer affinities with the genus Monomo- 

 rium ; its wings are more identical with those of Monomoriuvi 

 (relative size of cells, &c.). The channel of the epistome, 

 which is excavated anteriorly, also indicates a tendency to the 

 spines of Monomoriuvi. 



H. striata, Smith. 

 (Trans. Ent. Soc, London, 1876, p. 481.) 

 Tetraviorium striatum, Smith (^.c). ^ 5 <y . 



To Mr. Smith's description, who placed this species, one 

 does not know why, in the genus Tetraviorium, v;ith which it 

 has not the least affinity, there is to be added : 



^ . L. 4-3mm. to 4-9mm. Mandibles strongly striated. 

 The head is shining, but not quite smooth as stated by Mr. 

 Smith. The epistome, the front, the cheeks, and the sides of 

 the eyes are longitudinally striated ; the striae of the front are 

 divergent ; the dimples of the antennae have semicircular 

 striaB. The thorax has five more or less transverse strias, 

 often rather distant, and partly elegantly distorted, which 

 gives it quite a peculiar appearance. The metanotum (basal 

 face) is very convex. The nodes of the pedicle are rounded, 

 in shape like those of Aphanog aster. 



A reddish, rather scattered pilosity on the body, with 

 almost no adjacent pubescence. On the feet a long, some- 

 what erect, coarse and distant pubescence ; no dressed hairs 

 onthetibias. On the scapes the hairs are oblique. Epistome 

 excavated in the middle, and bisinuated on the sides. 



$ . L. 7'8mm. to 8-8mm. Much stronger striated than 

 the ^ , and subopaque. Everything is strongly striated, except 

 the middle (channel) of the epistome, the declivous face of the 

 metanotum, and the abdomen, which are smooth and shining. 

 The remainder of the epistome is more wrinkled than 

 striated. Wings finely pubescent, moderately coloured with 

 blackish-brown. Nervures and marginal spot blackish-brown. 



The ^ and 5 of this curious species were collected by Mr. 

 H. Suter on the 21st October, 1889, under stones near the 

 Hermitage, Mount Cook (2,540ft. altitude). South Island of 

 New Zealand, together with Monomoriam nitidum. Smith, 

 which is abundant in the same locality. Mr. Smith {I.e.) also 

 wrongly assigned Monomorium nitidum to the genus Tetra- 

 morium, a mistake already corrected by Mayr. 



