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



Range. — Eastern part of the United States. 



The original description of this subspecies is accompanied by a 

 drawing of the terminalia of each sex. In the female the upper lobe 

 of sternal plate VII, which is long and slender, is dilated apically. 

 The male genitalia differ from those of the other subspecies in minor 

 details. A redescription of the subspecies is given by I. Fox (25, 

 p. 63). 



Orchopeas sexdentatus schisintus (Jordan) 



Ceratophyllms sexdentatus schisintus Jordan, 1929, Novitates Zool. 35: 31, 

 pi. 1, fig. 5. 



Type host. — Neotoma sp. (wood rat). 

 Type locality. — Arizona. 

 Range. — Known only from Arizona. 



The original short description of this subspecies is here quoted in 

 full: 



Apparently differs in the $ only : the upper lobe of sternite VII broad and 

 short, the lower one absent or quite short. Exopodite of S with 5 or G spini- 

 forms. 



The Genus Opisodasys Jordan 



(Fig. 7, B) 



Opisodasys Jordan, 1933, Novitates Zool. 39: 72. Type, CeratophyUus rcsperalis 

 Jordan (by original designation). 



Frontal tubercle small to vestigial, angulate apically, and largely concealed 

 in frontal notch. Forehead with a single row of setae, the ocular row, but 

 each of other 2 rows frequently represented by a single large seta. Eyes well 

 developed, black. Labial palpus ."(-segmented, not reaching beyond apex of 

 trochanter I. Postantennal region of head with a single row of setae, the 

 posterior or marginal row: second row usually represented by a single large 

 seta. Pronotal comb with usual long, black spines. Femur I with not more 

 than a single lateral seta; coxa III without a patch or row of spinelets on 

 inner surface; segment I of posterior tarsus shorter than II, III, and IV com- 

 bined; last segment of each tarsus with 5 pairs of lateral, plantar setae, pair 

 I being displaced ventrally. Abdomen with a few apical spines, all dorsal. 

 Tergal plate VII without posterior median process. Antepyg : aial bristles 3 or 

 4 on each side in female ; 2 on each side in male. Female with a single recep- 

 taculum seminis and ventral margin of sternal plate X not distinctly angulate. 

 In male sternal plate VIII much modified, with or without apical membranous 

 appendage; sternal plate IX with conspicuous, inner, vertical processes, an 

 anterior median apophysis, and a pair of expanded, setigerous, posterior lobes: 

 movable finger of clasper large and flat, bearing 3 or 4 unequal pigmented spines, 

 which usually are directed backward or downward. 



This genus is very clearly near to Orchopeas Jordan, from which, 

 however, it is easily distinguished by the nature of the pigmented 

 spines on the movable finger of the clasper in the male. All species 

 are North American and probably all are Nearctic. 



Opisodasys enoplus (Rothschild) 



CeratophyUus enoplus Rothschild, 1909, Novitates Zool. 16: 53, pi. 8, fig. 6. 

 Opisodasys enoplus Jordan, 1933, Novitates Zool. 39: 72. 



Type host. — "California grey squirrel." 

 Type locality. — Kings River, Calif. 

 Range. — Known only from California. 



Rothschild based his description of enoplus upon a single male. 

 The species is characterized by having two pigmented, spinelike setae 



