40 T. V. HODGSON. 



The Oviger is ten-jointed, without a terminal claw, the last four joints with an irregular series of 

 special spines. In the male, the seventh joint bears a tuft of setse, and the eighth and ninth joints are 

 articulated at a considerable angle to the preceding joints. 



The Legs are long, tarsus very small, propodus armed proximally on the ventral margin with a 

 series of stout spines, claw rather large, and accompanied by two well-developed auxiliaries. 



The Genital apertures occur in the male on the two posterior pairs of legs ; in the female on 

 all the legs. 



The species I would assign to this genus are : 



L. striatiim, Mobius, 1902. 



L. grande, Pfeffer, 1889 = Ammothea i/randis, Pfeffer. 



= Ammothea charcoti, Bouvier. 



L. yiblosum, Mobius, 1902 = Colossendeix gibbosa, Mobius. 

 L. minus, sp. nov. 



L. clausii, Pfeffer, 1889 = Ammothea clausti, Pfeffer. 

 L. australe, sp. nov. 

 L. i/laciale, sp. nov. 

 L. spinomm, sp. nov. 



I have hesitated for some time as to the position of Ammothea magniceps (Thomson) 

 from New Zealand (30). Mr. G. M. Thomson most kindly placed the whole of his 

 collection at my disposal, but unfortunately it does not contain an adult male of this 

 species, therefore the structure of the male oviger remains unknown. The transverse 

 ridges of the trunk are prominent, but there is no trace whatever of the spurs so 

 characteristic of Leionyinphon. Under any circumstances, the species cannot be 

 regarded as a true Ammothea. (Mr. Thomson is in error in describing the palp as 

 with ten joints, there are only nine.) Be the true position of this species as it may, it 

 exhibits a preliminary stage in the transition between the diminutive Ammothea and 

 the large Leionyniphon. The next step is indicated by L. clausii and L. australe ; 

 these two species are very much alike ; from these by L. minor, L. gibbosum, and 

 L. grandu to L. Striatum. It would be difficult to give L. glacialis and L. spinosum a 

 position in a linear series. They probably diverge from L. striatiim in a different 

 direction to the others. 



KEY TO THE SPECIES. 



Body traversed by three prominent pyramidal ridges, spinose or setose : 

 Lateral processes close together 



"Proboscis half as long as body, cylindrical. L. striatiim. 

 Proboscis little longer than body, cylindrical. L. grande. 

 Proboscis as long as body, conical. L. fiillosum. 

 Proboscis shorter than body, slender, pyriform. L. minus. 

 Lateral processes widely separated 

 Proboscis little shorter than body. L. ylaciale. 

 Proboscis short, not half length of body. L. spinosum. 

 Body traversed by three rounded ridges, smooth : 



Abdomen vertical, l>ase traversed by the last trunk articulation. L. rluimii. 

 Abdomen oblique, some distance behind the last trunk articulation. L. australe. 



* Known only from immature examples. 



