DR A. WILLEY IN THE LOYALTY ISLANDS, NEW BRITAIN, ETC. 63 



Anal legs longish and slender, the femur nearly four times as long as broad, armed 

 with only 8 spines, including the apical process, arranged from above downwards as 

 follows: 3, 2, 1, 2 ; protarsus unspined. Protarsus of pre-anal leg and of all in front 

 of it with a single spur. 



Measurements in millimetres. Total length of body and head 78, of antennae 22, 

 of anal leg 24, width of body 8, of head 6, of anal tergite 5. 



Loc. New Britain. Two examples. 



This species differs from previously described forms in the fine granulation of its 

 tergal plates. Apart from this feature it may be recognised from the preceding species 

 by having only 8 spines on the anal legs. 



Dr Willey also obtained an example apparently referable to this species from 

 Narowol, in the Solomon Islands, and the British Museum has others from the Duke 

 of York Island, which Mr Butler confounded with specimens of E. platycephalus, 

 describing the two as Heterostoma brownii. The type of brotvnii, however, seems to 

 be cospecific with that of H. platycephalus. 



Order. GEOPHILOMORPHA. 

 Family. Diceleophilidae, Cook. 

 Genus. Mecistocephalus, Newport 1 . 

 Proc. Zool. Soc. 1842, p. 178. 



(9) Mecistocephalus punctifrons (Newport), 

 loc. cit. 



Loc. New Britain. 



(10) Mecistocephalus lifuensis, sp. n. 

 Colour yellow, head and maxillipedes castaneous. 



Head-plate sparsely punctured, a few larger punctures amongst the smaller ; two 

 posterior grooves prominent ; basal plate, maxillipedes and 1st tergite also sparsely 

 punctured. Each maxillipede armed internally with 5 tubercular teeth. 



Sterna, except the posterior, marked with median groove, which at the anterior end 

 of the body is Y-shaped. Sternite of anal segment broad at the base, triangularly 

 pointed posteriorly. 



Pleurae moderately inflated, furnished with only about 20 large scattered pores. 

 51 pairs of legs. Length 34 mm. 

 Loc. Lifu (Loyalty Islands). 



1 This genus of Newport's was primarily based upon the following species: ferrugineus, maxillaris, punctifrons 

 and guildingii. The first of these, ferrugineus, was subsequently, that is to say, in 1847, taken out as the type 

 of Pachymerium, and carries with it the second species, maxillaris. This left the two following species punctifrons 

 and guildingii to represent Mecistocephalus, and the former was practically selected as the type by Wood (1869), 

 and Meinert (1h70). Thus by the process of elimination punctifrons will stand as the type of Mecistocephdus, 

 of which Lamnonyx of Cook will be by this method a synonym. 



