54 MISC. PUBLICATION 5 0, U. S. DEPT. OF AGRICULTURE 



Amphalius necopinus (Jordan) 



Ceratophyllus necopinus Jordan, 1925, Novitates Zool. 32 : 110, fig. 37. 

 Amphalius necopinus Jordan, 1933, Novitates Zool. 39 : 74. 



Type host. — Ochotona schisticeps muiri (Grinn. and Stor.) (cony). 



Type locality. — Pine City, Mono County, Calif. 



Range. — Known only from California. 



The very striking characters of the claspers of the male at once 

 distinguish this species from all other American fleas. These char- 

 acters are represented in a figure which accompanies the original 

 description of necopinus. 



The Genus Nosopsyllus Jordan 



(Fig. 3) 



Nosopsyllus Jordan, 1933, Novitates Zool. 39: 76. Type, Puhx fasciatus Bosc 

 (by original designation). 



Frontal tubercle small, angulate apically. Forehead with a single complete 

 row of setae, the ocular row. Eyes black, not reduced. Labial palpus of 

 medium length, scarcely reaching apex of trochanter I. Postantennal region of 

 head with a single row of setae, the posterior marginal row. Pronotal comb 

 with the usual long, dark-brown spines. Femur I with several lateral setae ; 

 coxa III without a row or patch of spinelets on inner surface ; segment I of 

 hind tarsus a little shorter than II and III taken together; apical bristles of 

 segment II of tarsus III not extending beyond apex of segment IV ; tarsal 

 segment V of tarsus III with 5 pairs of lateral plantar bristles, none being 

 shifted ventrally. Abdomen with few apical spines, all of which are dorsal 

 or nearly so. Tergal plate VII without posterior median process. In female, 

 anal sternal plate angulate in middle; a single receptaculum seminis present, 

 the head of which is more strongly rounded above than below. In male, sternal 

 plate VIII very small, witbout setae, and entirely contained inside of sternal 

 plate VII; sternal plate IX with almost straight inner vertical processes, a 

 conspicuous, anterior, median apophysis, and a pair of long, flat, setae-bearing, 

 posterior lobes, each of which is divided into proximal and distal parts by a 

 deep, ventral emargination ; clasper with rather small manubrium, 2 large, 

 acetabular bristles, and a broad, flattened, distally out-curved, movable finger. 



This genus is particularly noted for the extreme reduction in size 

 of the nonsetigerous sternal plate VIII of the male. All its con- 

 tained species were originally confined to the Old World. Two of 

 them have been introduced into America. 



Nosopsyllus fasciatus (Bosc) 



(Fig. 3) 



Pulex fasciatus Bosc, 1801, Paris, Soc. Philomath., Bui. des Sci. 2: 156. 

 Ceratophyllus oculatus Baker, 1904, U. S. Natl. Mus. Proc. 27: 396, pi. 19, figs. 



10-14. 

 Ceratophyllus canadensis Baker, 1904, U. S. Natl. Mus. Proc. 27: 407, pi. 20, 



figs. 1-4. 

 Ceratophyllus calif ornicus Baker, 1904, U. S. Natl. Mus. Proc. 27: 395, pi. 17, 



figs. 5-8. 

 Nosopsyllus fasciatus Jordan, 1933, Novitates Zool. 39: 76. 



Type host. — u Myoxus nitela.^ 



Type locality. — Unknown. 



Range. — Found in all or nearly all temperate countries and in 

 many others. 



The three species given as synonyms above were each described 

 from a single specimen, and in the case of canadensis the host was 



