18 MISC. PUBLICATION 5 00, U. S. DEPT. OF AGRICULTURE 



Chaetopsylla lotoris (Stewart) 



(Fig. 4, E) 



Trichopsylla lotoris Stewart, 1926, Insecutor Inscitiae Menstruus 14 : 122, 1 fig. ; 

 I. Fox, 1940, Fleas of the Eastern United States, p. 33, pi. 8, figs. 35, 37, 

 and 38,' and pi. 9, fig. 42. 

 Chaetopsylla lotoris Wagner, 1936, Canad. Ent. 68 : 195. 



Type host.—Procyon lotor (L.) (raccoon). 



Type locality.— Olcott, N. Y. 



Range.— Eastern part of the United States. 



This flea probably has the raccoon as an exclusive true host. That 

 it should have existed so long on such a common and well-known host 

 as the raccoon without discovery is remarkable. It is particularly 

 significant that the host is related to the bears and that Chaetopsylla 

 setosa Rothschild occurs on our black bear. 



Chaetopsylla setosa Rothschild 

 Chaetopsyllus setosus Rothschild, 1906, Canad. Ent. 38 : 321, figs. 41 and 42. 



Cotype hosts. — Cards latrans Say (coyote) and Euarctos americanus 

 (Pallas) (black bear). 



Cotype localities. — Eagle River, Sicamous, and Mabel Lake (British 

 Columbia), Canada. 



Range. — Known only from Canada. 



The original description of setosa was based only on the female. 

 A single male, taken from Vrsus horribilis bairdi (grizzly bear), and 

 considered as possibly this species, was described and figured bv 

 Wagner (83, p. 335, fig. 2) in 1936. 



The Genus Arctopsylla Wagner 



(Fig. 4. D) 



Arctopsylla Wagner, 1930, Katalog der palaearktischen Aphanipteren, p. 40 ; 1933, 

 Konowia 12: 94. Type, Ceratophyllus tubcrculaticeps Bezzi (by original 

 designation). 



The genus Arctopsylla was proposed by Wagner in 1930, but with- 

 out description. It was described by him in 1933. 



Frontal tubercle vestigial. Antennal club pointed apically. Eyes present, 

 well developed. Labial palpus long, extending to or beyond apex of trochanter 

 I, with 7 to 10 segments. Postantennal region of head with 3 rows of setae, the 

 posterior row submarginal. Pronotal comb absent. Upper sclerite of metepi- 

 sternum not distinctly separated from metepisternum proper but separated from 

 metanotum by an internal sclerotized ridge. Metepimeron not fused along 

 upper part with metepisternum. Abdomen of gravid female but little distended. 

 Antepygidial bristles not differentiated from the others. Sternum VIII of 

 male large, broad, unmodified ; sternum IX much reduced but otherwise not 

 greatly modified. 



Arctopsylla ursi (Rothschild) 



(Fig. 4, D) 



Pulex ursi Rothschild, 1902, Ent. Rec. and Jour. Variation 14 : 62, pi. 2, fig. 1. 

 Arctopsylla ursi Wagner, 1930, Katalog der palaearktischen Aphanipteren, p. 40 

 (as a synonym of A. tuberciilaticeps (Bezzi) ). 



Type host. — -Ursus horribilis Ord (grizzly bear). 



Type locality. — Calgary, Alberta. 



Range. — Known only from Canada and Alaska. 



