Mites Injurious to Domestic Animals. 89 



There are a number of species of Liponyssus, most of them 

 being parasitic on bats and rodents, a few on reptiles and on birds. 

 Two species (L. bursa and L. sylviarum) are parasitic on the domestic 

 hen. Another species (L. bacoti, Hirst, fig. 65), is parasitic on rats, 

 and is widely distributed in the warmer parts of the world, some- 

 times attacking man. 



Liponyssus bursa, Berlese, 1888. 

 (Figs. 66, 67 a, 68 a, 69 a and 70.) 



The tropical fowl mite apparently replaces Dermanyssus gallinae 

 in the warmer regions of the world. It is very widely distributed 



FIG. 75. 



Sternostomum rhynolethrum (p. 92). A mite living in the nasal cavities 

 of geese. Female from above. (After Berlese.) 



in Africa, also occurring in Mauritius, the Comoro Islands, China, 

 India, Texas, the Bahamas, Colombia, Buenos Aires, and in 

 Australia. Sometimes it occurs in very large numbers on nesting 

 hens. Several cases of this fowl mite attacking man have been 

 recorded. L. bursa has been found on the common sparrow, and, 

 like L. sylviarum, possibly it is conveyed from one locality to 

 another by this host. When the name Dermanyssus gallinae is 

 met with in reports by entomologists dealing with the parasites of 

 the domestic fowl in tropical countries, it is probable that L. bursa 



