58 Transactions. — Zoology. 



Male. — "The ten black spines of the head are placed in 

 three rows. On the end of the prothorax, in the middle, a 

 black spot ; and a fine line along the middle of the meso- 

 thorax. Some of the irregularly formed and placed spines are 

 black at the ends. The tubercles of the metathorax obtuse 

 and iinicolour. The leaves look short ; anal styles on both 

 sides in the middle carinated " (Kaup). Length of the body, 

 39 mm.; of mesothorax, 7i^ mm. ; of metathorax, 8^ mm. ; of 

 abdomen, 23 mm. ; of antennae, 8 mm. 



Hah. Great Barrier Island, several females ; Canterbury, 

 one female. 



Acanthoderus fasciatus, sp. nov. 



Pale-grey, variegated with darker. Femora and tibiae with 

 transverse dark bands. Posterior end of each abdominal seg- 

 ment dark. Antennae 20-jointed. Head with about ten spines, 

 one pair larger than the others. Pronotum with two pairs of 

 spines near the posterior margin, the anterior pair much 

 smaller. Mesonotum with about thirty-four thick spines 

 placed irregularly, except the posterior pair. Metanotum 

 with about twenty-four thick spines. Episterna of the meso- 

 and meta-thorax with a row of seven spines. Eight small 

 spines on the mesosternum and six on the metasternum. 

 Abdomen as in A. geisovii, the fourth, fifth, and sixth segments 

 with lateral expansions. Anal segment squarely truncated at 

 the end. Ovipositor not reaching to the end of the eighth 

 segment. Femora foliaceous ; the anterior with five teeth 

 above and seven on the outer lower margin. Middle and 

 posterior femora with four strong teeth on each of the four 

 ridges. Middle and posterior tibiae with a strong tooth on the 

 upper side, near the proximal end. 



Length of the body, 54 mm.; of mesothorax, 10 mm.; of 

 metathorax, 9^ mm. ; of abdomen, 30 mm. ; of antennae, 9mm.; 

 of anterior femur, 14 mm. ; of middle femur, 10 mm.; of pos- 

 terior femur, 10|^mm. 



Hab. Great Barrier Island. A single specimen. 



This species is allied to A. geisovii, but is distinguished 

 from it not only by its colours, but by the more numerous 

 spines on the thorax, and the stronger teeth on the legs. 



Genus Aegosarchus, Hutton (1^98). 



The first abdominal segment is considerably longer than 

 broad, nearly twice as long as the median segment of the 

 metanotum. The suture between the median segment and 

 the rest of the metanotum is not marked by spines, as it is in 

 Acanthoderus. In the male the basal joints of the tarsi are 

 not crested. 



