BIRD-INFESTING MALLOPHAGA OF JAPAN. 



71 



Female : — Ground colour of head and thorax pale brown with blackish 

 brown marking ; abdomen yellowish ; lateral bands blackish brown. 



Head conical ; front weakly convex with a few very fine hairs ; sides of 

 head straight ; palettes medium-sized, laterally projecting ; palpi projecting 



with the apical segment ; ocular emargination 

 small, with two short prickle-like hairs ; 

 temples produced backwards and acutely 

 angled, with three hairs — a long hair anterior- 

 ly on the margin, and farther back a short 

 and a long hair situated at a somewhat dorsal 

 position. — Occipital margin deeply re-entering. 

 Colour of head whitish ; markings on border 

 of antennal fossae and on occiput blackish 

 brown, those of other parts brownish. 



Prothorax hexagonal, nearly as wide as 

 the head at temples ; anterior and posterior 

 margins concave ; two spines on lateral mar- 

 gin in front of the lateral angle which bears 

 one long hair and two spines ; a single long 

 hair on each lateral margin near the posterior 

 angle ; lateral margins unevenly coloured 

 dark brown ; submarginal bands blackish 

 brown. 



Metathorax longer than prothorax ; its 

 anterior parts rounded and covered by 

 prothorax ; posterior margin straight ; sides slightly swollen in the anterior 

 third of its length, straight behind that swelling, four or five spines scattered 

 along lateral margin ; a long hair on each posterior angle ; submarginal 

 lateral bands narrow and blackish brown, outside which bands the margin of 

 the posterior half of the segment :'s irregularly coloured with blackish 

 brown. Legs long, ralher slender and almost colourless. 



Abdomen nearly parallel sided ; with a long hair and a spine in posterior 



Fig. 2. 

 Physostomum mugimaki 

 n. sp. : female. X 28 



