56 Transactions. — Zoology. 



ridge of the middle and posterior femora quite smooth. 

 Sometimes there is a sHght denticulation on the outer 

 (anterior) ridge of the posterior femora near the base. Both 

 middle and posterior femora with a pair of strong subapical 

 teeth as well as the apical pair. 



Length of the body, 92 mm.; of mesothorax, 18 mm.; of 

 metathorax, 16 mm.;" of abdomen, 49 mm.; of antennae, 

 21 mm. ; of anterior femur, 25 mm. ; of middle femur, 17 mm. ; 

 of posterior femur, 19 mm. 



The male is unknown. 



Hab. Canterbury. 



Formerly this species used to be common in the neighbour- 

 hood of Christchurch. 



Clitarchus laeviusculus, Stal (1875). 

 Smooth, and with only a few or no denticulations on the 

 anterior femora. 



Hab. Great Barrier Island, not common ; Canterbury. 



Genus Acanthoderus, Gray (1835). 

 Clitarchus, Section B, Hutton, Trans. N.Z. Inst., vol. xxx., 

 p. 164. 



The first abdominal segment is rather longer than the 

 median segment of the metanotum. 



Artificial Key to the Species. 

 Second and following abdominal segments without spines. . A. prasinus. 

 Second and following abdominal segments with spines. 



Femora not foliated . . • • . . A. suteri. 



Femora distinctly foliated. 



Colour green . . .. •• •• •• A. geisoni. 



Colour grey, variegated dark and light . . ..A. fasciatus. 



■ Acanthoderus prasinus, Westwood (1859). 

 Bacillus atro-articulus, Colenso (1885). 



Only the female is known. Antennae with 23 joints. 

 Length of the body, 94 mm. ; of mesothorax, 17 mm. ; of meta- 

 thorax, 161 mm. ; of abdomen, 51 mm. ; of antennae, 19 mm. ; 

 of anterior" femur, 24 mm. ; of middle femur, 15^ mm. ; of pos- 

 terior femur, 19|^mm. 



Hab. Great Barrier Island, a few specimens; Hawke's 

 Bay ; Canterbury. 



Acanthoderus suteri, nov. noin. 

 Clitarchus geisovii, 2 , Hutton, Trans. N.Z. Inst., vol. xxx., 



p. 165, not of Kaup. 



In this species the spines on the thorax are slender and 

 pointed, as in A. prasinus, and differ much from those of 



