168 CALIFORNIA ACADEMY OF SCIENCES [Proc. 4th Ser. 



1880. Hcematopinus crassicornis Piaget, Les Ped., p. 



644. 

 1908. Hcematopinus crassicornis Dalla Torre, Gen. 



Ins., Anopl., p. 11. 

 1916. Cervophthirius crassicornis Ferris, Ent. News, 

 Vol. 27 (in press). 

 2 — Cervophthirius tarandi Mjoberg. From Rangifer taran- 

 dus (Karesuando, Sweden). 



1915. Cervophthirius tarandi Mjoberg, Ent. Tidskrift, 

 Vol. 36, pp. 283-285, f. 1-4. 



Note: It is extremely doubtful if this is at all dis- 

 tinct from Cervophthirius crassicornis (N.). 



Genus Eulinognathus Cummings 



Eulinognathus Cummings, Ann. Mag. Nat. Hist., ser. 8, 

 Vol. 17, p. 90 (1916). 



Head longer than broad, antennae arising just in front of 

 half way, broader behind the antennae than in front. Behind, 

 the head is sunk deep into the thorax. Around the mouth, in 

 front, a circlet of triangular denticles. Abdomen without ter- 

 gites or sternites. Five pairs of pleurites, the anterior pair well 

 developed. First pair of legs small, second and third larger, 

 sub-equal. Hairs on the abdomen modified, long, flattened, 

 parallel-sided, truncate at tip, one row on each segment. 



Type of the genus Eulinognathus denticulatus Cummings. 



Recorded from Pedetidce and Dipodidce (Rodentia). 



1 — Eulinognathus denticulatus Cummings. From Pedetes 

 caifer. 



1916. Eulinognathus denticulatus Cummings, Ann. 

 Mag. Nat. Hist., ser. 8, Vol. 17, pp. 90-94, f. 1. 



2 — Eulinognathus aculeatus (Neumann). From Dipus sp. 

 (Djerba, Tunis). 

 1912. Hcematopinus (Polyplax) aculeatus Neumann, 

 Bui. Soc. Zool., France, Vol. 37, pp. 143-145, 

 f. 5-6. 



Genus Neohcematopinus Mjoberg 



Neohcematopinus Mjoberg, Ark. f. Zool., Vol. 6, pt. 13, 

 p. 160 (1910); Cummings, Bui. Ent. Res., Vol. 3, p. 393 



