146 Transactions. — Zoology. 



to reddish-brown on the hind tibiae ; changing to yellow on the 

 face, front tarsi, and greater part of antenna?. Head short, 

 fore part vertical. Eyes prominent, rounded, and blackish- 

 brown in colour, as is also the slightly-polished vertex. 

 Maxillary palpi long and slender ; the fourth joint somewhat 

 longer than the third ; the fifth appreciably longer, and dis- 

 tinctly subclavate. Labrum prominent ; labial palpi clavate 

 at the tip. Antennae extremely long and slender, being more 

 than six times the length of the body ; the first joint much 

 thickened, the rest smooth and even, being entirely free from 

 the minute knobs and spines that occur on the antennae of 

 Macrojjatlms fascifer. Prothorax well covered with shield, 

 which is broadest behind, the lower border being slightly 

 reflexed. Mesothorax and metathorax presenting broad, even 

 segments ; the eight abdominal dorsal segments much 

 narrower, closely set, and gradually diminishing in size 

 towards the extremity ; cerci of moderate length and beset 

 with fine hairs, especially towards the base. Abdomen short, 

 slightly compressed. Legs slender, extremely long, and very 

 spiny; hind femora greatly swollen towards the base; knees 

 nodose. The four anterior femora have spines beneath, but 

 the number is uncertain : thus, of the first pair the right-hand 

 femur has four spines, and the left-hand femur five spines ; of 

 the pair behind, the right femur has two on one side and five 

 on the other, whilst the left femur has three on each side ; 

 the hind femora, on their channelled posterior surface, have 

 twelve to thirteen sharp spines, set well apart, on one side, 

 and tw T enty-three to twenty-five small closely-set ones on the 

 other side. So also with the tibiae : the first pair have each 

 five extremely fine spines, or rather spurs, on each side, the 

 apical ones being the longest ; of the next or middle pair the 

 right-hand tibia has three on one side and four on the other, 

 whilst the left-hand tibia has three on one side and two on 

 the other. The hind tibiae are armed with a regular double 

 series of sharp, slightly-decurved spines, exactly resembling 

 the thorns on a rose-bush, those towards the base being 

 extremely minute, and the apical or terminal ones very long ; 

 the right-hand tibia has twelve on one side and fourteen on the 

 other, whilst the left-hand tibia has twelve on one side and 

 eleven on the other. It will be seen, therefore, that the 

 number of spines is a very uncertain character. The body, 

 without the appendages, measures exactly lin. in length and 

 0'4in. in its widest part ; the hind femora measure 2in., and 

 the hind tibiae 2 , 25in. ; the cerci, which are slightly curved 

 upwards, measure 03in. ; and the antennae 6"25in. 



I have made this Weta the representative of a fourth group 

 of Walker's genus Macropatlms. It may, however, be neces- 

 sary to make it the type of an entirely new genus. It differs 



