228 Transactions. — Zoology. 



tubercle in the middle. Legs rather long and slender, the 

 hind femora but slightly dilated ; coxas of the fore legs spined, 

 widely separated from each other, those of the hind legs closer 

 together but separated by the first abdominal segment. Fore 

 and middle femora with an apical pair of strong, movable, 

 brow^n spines ; those of the hind legs with a short apical spine 

 on the inner side, as well as some small spines below. Tibiffi 

 of fore and middle legs unarmed above, those of the hind legs 

 unarmed below. Fore and middle tibiae with two pairs of 

 apical spines ; the hind tibiae with four pairs, of which the 

 superior intermediate pair are very broad and strong, the 

 inner and outer about equal ; the pair below them not half 

 the length of the superior pair ; the other two pairs are quite 

 small, and placed above and below the long spurs ; the three 

 lower pairs are articulated to the tibia, the upper pair are 

 fixed ; none of the spurs of the hind tibiae have hairs. First 

 and second joints of the hind tarsi with a pair of strong apical 

 spines above ; the fourth joint shorter than the first. Supra- 

 anal plate roughened, concave at the apex. Cerci rather long, 

 erect, curved, stout. Subgenital plate of the male transverse, 

 rather inflated, the apex trilobed ; styles short, the lobes bear- 

 ing them rounded, not at all prominent. 

 Locality. — Bounty Islands only. 



Ischyroplectron isolatum. Plate XII., figs. 10, 10a; Plate 



XIII., fig. 106. 

 Ceiithophihts (?) isolatus, Hutton, Trans. N.Z. Inst., xxvii, 



p. 175 (1895). 



Head smooth and shining ; antennae with short hairs. 

 Lobes of the pronotum thickly margined, especially behind, 

 their inferior margins nearly horizontal, slightly rounded ; 

 those of the mesonotum thickly margined, rounded, reaching 

 rather below the lobes of the pronotum ; metanotum not mar- 

 gined. Fore and middle femora unarmed below ; hind femora, 

 below, with six small spines on the inner and numerous small 

 denticulations on the outer edge. Fore and middle tibiae with 

 three pairs of spines below ; hind tibiae, above, with eleven to 

 thirteen distant spines, which are irregular in size ; both 

 surfaces rounded and slightly roughened. Subgenital plate 

 of male with the middle lobe narrower and shorter than the 

 lateral lobes, forming a rounded keel. 



Colours. — Brown, the thorax and abdomen variegated with 

 yellowish, the darker colour on the pronotum forming an in- 

 distinct St. Andrew's cross. Posterior margins of pronotum 

 and mesonotum brown. Head pale ; antennae dark. Hind 

 tibiae and tarsi reddish-brown. 



Length, 34mm. ^ , 29mm. ? ; pronotum, 9nnn.(^, 8mm. $ ; 

 thorax, 16mm. ; abdomen, 18mm. ; ovipositor, 20mm. ; fore 



