244 PROCEEDINGS OF THE NATIONAL MUSEUM vol. loi 



Size. — Seven measurable females varied from 770/x, to 952ju, in body 

 length; the mean was 856. It was impossible to obtain an accurate 

 measurement of body width. Three males were 700//,, 686ju,, 658ju, in 

 length ; the width of the first two specimens was 364ju,. Two nymphs 

 measured 630/li and 616/a in length; the latter was 350ju, in width. 

 Hirst (1916) gives the length of the female as l,100ju, the male 760ju,, 

 and the nymph 750ju,. 



Distribution. — Cosmopolitan; reported from England and South 

 Africa by Hirst (1914) and from Maccuarie Island in the Australian 

 Antarctic region by Womersley (1937). There are specimens in the 

 U. S. National Museum collection from France, Holland, Italy, Portu- 

 gal, and China. It has been taken in the United States at Ward, 

 Colo., and in New York. 



Hosts. — This species is apparently a facultative parasite. Hirst 

 (1914) reported it from wild rats and raised numerous specimens on 

 laboratory mice and rats. He also reported the species as taken from 

 a bat in South Africa, from a mole's nest in England, and as free 

 living in England. Specimens examined were found in a variety of 

 habitats: Wlieat straw, flax tow, rice straw, rice hulls, in sod, and 

 associated with the clothes moth. It has been taken only three times 

 in the United States : Once from a nest of Tamiasciurus fremonti at 

 Ward, Colo., once associated with clothes moths in New York, and once 

 on a rug in the same State. I have examined specimens as follows : 

 On Tigridia bulbs, Holland, intercepted at quarantine at Philadelphia, 

 Pa., May 13, 1946; wheat-straw jacket, France or Germany, at Cleve- 

 land, Ohio, August 10, 1945 ; in sod, Scotland, at New York, August 

 10, 1944; with flax tow, "Pacific area," Cleveland, Ohio, July 24, 1945 ; 

 in wheat straw, Italy?, at Cleveland, Ohio, December 20, 1944; in 

 straw jackets, Portugal, at Los Angeles, Calif., January 14, 1944; on 

 rye-straw jacket, Scotland, at Buffalo, N. Y., September 29, 1938; in 

 rye-straw packing, Portugal, at Portland, Oreg., July 8, 1944; in rice 

 hulls, China, at Chicago, 111., September 4, 1924; associated with 

 clothes moth, New York, November 1928; in Tamiasciurus fremonti 

 nest, Ward, Colo., July 2, 1940; on rug. New York, April 12, 1930; 

 on Marrubium, vulgare., Italy, at New York, May 25, 1936 ; on Juncus 

 sp., Portugal, at Boston, Mass., July 5, 1944. 



EUHAEMOGAMASUS LIPONYSSOIDES (Ewing) 



Figure 50 



Haemogamasus liponyssoidcs Ewing, Proc. Biol. Soc. Washington, vol. 38, pp. 

 139-140, 1925.— ViTzTHUM, Zool. Jahrb. (Abt. Syst.), vol. 60, p. 402, 1931. 



Euhaemogamasus liponyssoides (Ewing) Spencer, Proc. Ent. Soc. British Co- 

 lumbia, vol. 37, p. 15, 1941. 



Female. — Dorsal shield sculptured; widest at level of coxae III. 

 Usual pair of apical setae clearly largest on shield, flanked by two 



