40 NORTH AMERICAN ANOPLURA 



cesses. Basal plate long and slender. Parameres long and stout. Penis 

 long and slender, with arms diverging but slightly. 



Genus ENDERLEINELLUS Fahrenholz. 



Enderleinellus Fahrenholz, Zool. Anzeiger, vol. 39, p. 56, (1912). 



Enderleinellus Fahrenholz, Reprint from second, third and fourth Jahresbericht des 

 Niedersachsischen Zool. Vereins zu Hannover (Zoologische Abteilung der 

 Naturhistorischen Gesellschaft zu Hannover), pp. 52, 58, (1912). 



Antennae five-segmented. Anterior and middle pairs of legs of the 

 same size, small, with slender pointed claws, posterior pair much larger 

 and heavier with very stout claws, the tarsi with or without a sharp pro- 

 cess at the outer, anterior angle. 



Abdomen without chitinized tergal and sternal plates or with these 

 plates but weakly developed. Second tergite and third sternite with two 

 transverse rows of hairs, remaining tergites and sternites with one row. 

 Pleural plates present on second to fifth or sixth segments. Third ster- 

 nite with a pair of widely separated chitinous plates of doubtful homology. 



This genus was established for a single species, E. sphaerocephalus 

 (Burm.), found upon squirrels in Europe. We are referring to it one 

 species, E. suturalis (Osborn), which has previously been referred to 

 Polyplax, a new variety of this species, and two new species, all being 

 from Sciurids. 



Enderleinellus suturalis (Osborn). 

 Plate IV, fig. 9. 



Haematopinus suturalis Osborn, Bui. 7, o. s., U. S. Dept. Agr., Div. Ent, p. 27, fig. 



15, (1891) ; Bui. 5, n. s., U. S. Dept. Agr., Div. Ent., p. 185, fig. 109, (1896). 

 Polyplax (?) suturalis Enderlein, Zool. Anz., vol. 28, p. 143, (1904). 

 Polyplax (?) suturalis Dalla Torre, Genera Insect., Anoplura, p. 14, (1908). 



Through the kindness of Professor Osborn we have been enabled 

 to examine specimens of this species taken from Citellus franklini (Ames, 

 Iowa). Since we are describing a variety of this species and also a new 

 species very closely related to it, we are redescribing it more fully here. 

 We may remark that Polyplax otomydis Cummings, which was stated by 

 its author to be very close to E. suturalis, is, as a matter of fact, very dif- 

 ferent, the only point in which the two species at all closely resemble 

 each other being in the common possession of the transverse suture across 

 the head. 



