Johnston and Harrison. — Mallophaga from the Kermadecs. 367 



Lipeurus languidus Kellogg and Kuwana (1902, p. 475, pi. 29, fig. 8). 



Two females and one male of this species were taken from Pelago- 

 droma marina Lath. The species was originally described from Galapagos 

 Island, where it was taken from Oceanites gracilis and Procellaria tethys, 

 as well as on a number of other hosts to which it had obviously 

 straggled. 



Lipeurus exiguus Kellogg and Kuwana (1902, p. 479, pi. 30, fig. 2). 



One female from Pelagodroma marina Lath. The species was origin- 

 ally described from Oceanites gracilis from Galapagos. 



Degeeriella oliveri n. sp. 



A few males and one female of this species were collected from Numenius 

 variegatus Scop. The form resembles fairly closely D. actophilus of 

 Kellogg and Chapman (1899, p. 78) from Calidris arenaria Linn, from 

 California, and, in a less degree, D. inaequalis of Piaget (1880, p. 176) 

 from Numenius arquatus Linn, from Europe ; but differs 

 markedly in detail from either. From both the forms 

 mentioned our species differs in the proportionately greater 

 length of the head in front of the antennae, and also in 

 the relations of the chitinous framework of the clypeal 

 parts. The signature does not extend across the width of 

 the clypeus, as in Kellogg's figure of D. actophilus, and 

 its rounded posterior angle projects strongly into a clear 

 uncoloured space, which is thus not a transverse bar, but 

 a more or less horseshoe-shaped clear area. Dorsal to the 

 signature, the clypeal bands of either side are produced 

 as a deeply sinuous structure crossing the anterior margin 

 of the head. 



From D. inaequalis, to which it approximates in size, 

 it is easily distinguishable from the fact that the sides 

 of the abdomen are convexly subparallel to the 6th 

 segment, and then taper somewhat to a broadly rounded 

 9th segment in the male, while Piaget's species has 

 the abdomen much swollen at the 4th and 5th segments, 

 and tapering considerably before and behind. Also, the Degeeriella oliveri 

 last segment of the abdomen in the female is barely <? . 



notched, and not markedly bifid, as figured by Piaget. 



From D. actophilus, besides the differences in the head region already 

 indicated, it may easily be distinguished by its greater size, 1-85 mm., as 

 against 1-6 mm. 



We figure tho male, of which the measurements are : Length, 1-85 mm. ; 

 breadth, 0-37 mm. ; head, 0-49 mm. by 0-3 mm. The female differs 

 chiefly in the shape of the abdomen, the sides of the last two segments 

 converging abruptly, and meeting almost at right angles, with a slight 

 notch in the apex ; and in the generally lighter colour of the transverse 

 bands of the abdomen. It measures : Length, 1-88 mm. ; breadth, 

 0-44 mm. 



We have named this species in tribute to Mr. W. R. B. Oliver, one 

 of the leaders of the expedition. 



Fig. 3. 



