46 NORTH AMERICAN ANOPLURA 



Description of the Male. — Total length .51 mm., length of head 

 .14 mm., length of abdomen .32 mm., width of head .8 mm., width of 

 thorax .15 mm., width of abdomen .25 mm. 



Similar to female except in having the body more slender, and in 

 the presence of a narrow, transverse, chitinized strip in front of each row 

 of spines on the abdomen. Posterior end of the abdomen rounded. Geni- 

 talia very large and conspicuous and of a very peculiar form. Basal plate 

 divided into two slender, widely-separated rods ; parameres apparently 

 lacking, although the homology of the parts is extremely obscure. 



HAEMATOPINOIDES Osborn. 



Haematopinoides Osborn, Bui. 7, o. s., U. S. Dept. Agr., Div. Ent, p. 28, (1891) ; 



Bui. 5, n. s., U. S. Dept. Agr., Div. Ent., p. 187, (1896). 

 Haematopinoides Enderlein, Zool. Anz., vol. 28, p. 140, (1904). 

 Haematopinoides Dalla Torre, Genera Insect., Anoplura, p. 15, (1908). 



Antennae three-segmented. Middle and anterior legs small, pos- 

 terior pair larger. Abdomen without chitinized tergal and sternal plates, 

 but with the pleural plates present on the first to eighth segments, very 

 large and overlapping. 



Haematopinoides squamosus Osborn. 



Haematopinoides squamosus Osborn, Bui. 7, o. s., U. S. Dept. Agr., Div. Ent., p. 28, 

 fig. 16, (1891) ; Bui. 5, n. s., U. S. Dept. Agr., Div. Ent., p. 187, fig. no, (1896). 



Haematopinoides squamosus Enderlein, Zool. Anz., vol. 28, p. 136, (1904). 



Haematopinoides squamosus Dalla Torre, Genera Insect., Anoplura, p. 15, fig. 10, 

 (1908). 



This singular species has been recorded but once, having been taken 

 from a pocket gopher, Geomys bur sarins (Ames, Iowa). We are inclined 

 to believe that its natural host is not one of the Geomyidae, since the 

 examination of many specimens of several species of Geomyids in Cali- 

 fornia has not revealed it. Furthermore a very similar species, if not 

 indeed the same, has been recorded from a mole. We have not been able 

 to see the type of the species. 



EUHAEMATOPINUS Osborn. 



Euhaematopinus Osborn, Bui. 5, n. s., U. S. Dept. Agr., Div. Ent, p. 186, (1896). 

 Euhaematopinus Enderlein, Zool. Anz., vol. 28, p. 140, (1904). 

 Euhaematopinus Dalla Torre, Genera Insect., Anoplura, p. 16, (1908). 



Antennae three-segmented. Thorax with a pair of large spiracles. 



