158 * CALIFORNIA ACADEMY OF SCIENCES [Proc. 4th Ser. 



Genus Linognathoides Cummings 



Cummings, Bui. Ent. Res., Vol. 5, pp. 159-160 (1914); 

 Kellogg & Ferris, Anopl. & Mall, of N. Am. Mam., pp. 23- 

 24 (1915). 



In general similar to Polyplax. Abdomen without chitin- 

 ized tergal and sternal plates or with these very much reduced. 

 Pleural plates present. Spiracles small. 



Recorded from Muridae and Sciuridae (Rodentia). 



Type of the genus Linognathoides citelli Cummings. 



1 — Linognathoides citelli Cummings. From Citellus lepto- 

 dactylus and ? Cricetulns phceus (Transcaspia). 



1914. Linognathoides spermophili Cummings, Bui. 

 Ent. Res., Vol. 5, pp. 160-163, t. f. 3. 



1916. Linognathoides citelli Cummings, Ann. Mag. 

 Nat. Hist., ser. 8, Vol. 17, p. 107. 

 2 — Linognathoides inomatns Kellogg & Ferris. Type from 

 Neotoma cinerea occidentalis (California, U. S. A.). Also 

 from AL cinerea cinerea and ? N. fuscipes streatori (Cali- 

 fornia). 



1915. Linognathoides inomatns Kellogg & Ferris, 

 Anopl. & Mall, of Am. Mam., pp. 25-27, t. f. 

 10; pi. 2, f. 1 ; pi. 4, f. 7; pi. 5, f. 15 ; pi. 6, f. 3. 



1916. Linognathoides inornatus Ferris, Psyche, Vol. 

 23 (in press). 



3 — Linognathoides Iceviusculus (Grube). Type from Citel- 

 lus eversmanni (Jakutsk, Siberia). 



1851. Pediculus Iceviusculus Grube, Middendorft's 



Reise, Vol. 2, p. 498; pi. 32, f. 5 (figure labeled 



P. spermophili). 

 1874. Hcemaiopinus Iceviusculus Giebel, Ins. Epizoa, 



p. 38. 

 1880. LIcerdatopinus Iceviusculus Piaget, Les Ped., p. 



641. 

 1904. Polyplax Iceviuscidus Enderlein, Zool. Anz., 



Vol". 28, p. 142. 

 1908. Polyplax Iceviuscidus Dalla Torre, Gen. Ins., 



Anopl., p. 13. 

 1910. Polyplax Iceviuscula Mjoberg, Ark. f. Zool., 



Vol 6. pt. 13, p. 160. 



