Bird=infesting Mallophaga of Japan. 

 (Genus Physostomum) 



By 



Seinosuke Uchida. 



Genus PHYSOSTOMUM Nitzsch. 



Kellogg, Mallophaga, Genera Insectorum, 1908, Fase. 66, p. 71 ; 

 Mjöberg, Atkiv for Zoologi, 1910, Bd. 6, p. 58. 



I. Physostomum mystaae Nitzsch. 



Denny, Monogr. Anopl. Brit., 1842, p. 241, pi. xxm, fig. 6 ; Giebel, 

 Insecta Epizoa, 1874, p. 254, Taf. win, Fig. 2, 3 ; Piaget, Les Pediculines, 

 1SS0, p. 602, pi. L, fig. 2. 



A single female collected by Mr. N. Kuroda from Turdus f meatus in 

 Tokyo. 



2. Physost omum frenulum Nitzsch. 



Giebel, Insecta Epizoa, 1S74, p. 256, Taf. xviu, Fig. 6. 

 Two females and two youngs collected from Rcgitlns regulus japonensis 

 in Prov. Shinano, April 4, 1914. 



3. Physostomum diffusum var. palliti urn Kellogg. 

 Kellogg, New Mallophaga 11, 1S96, p. 519. 



One male specimen from Mont ifr indilla brunneinucJia collected in Prov. 

 Shinano, Feb. 13, 1914. 



The specimen, although a male, agrees perfectly with Kellogg's de- 



