26 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. I23 



Aedeagus (figs. 109, 110). — Essentially as in hesperomys but with 

 following differences: crochets (CR.) broader throughout their 

 lengths, but of same general type; distolateral lobe (DL.L.) about 

 three times as long as broad. Central thickening (C.TH.) weakly 

 sclerotized, inapparent. 



Female. — Posterior margin of seventh sternum (fig. 40) with a 

 fairly deep sinus ; above sinus with a subrounded lobe ; below sinus, 

 margin somewhat oblique, straight. Anal stylet about two times as 

 long as wide ; with two apical bristles, one longer than other, or with 

 one long apical bristle and one shorter ventral subapical bristle. 

 Spermatheca (fig. 40, SP.) as in hesperomys. 



Length. — Male 1.8-2.25 mm.; female 2.5-2.8 mm. 



Types. — Holotype, male, and allotype, female, U.S.N.M. No. 28919, 

 from Neotoma fuscipes Baird, Los Angeles, Calif. 



The apparent range of this species is coastal and southern California. 



Records of Specimens Examined 



United States. California: Los Angeles County (Peromyscus calif orniciis 

 insignis) ; Monterey County (P. calijornicus) ; San Diego County (Dipodomys 

 sp., "mouse"). 



PEROMYSCOPSYLLA DRACO Hopkins, 1951 

 Figures 43-48, 108 



Leptopsylla adelpha Rothschild, in Jordan and Rothschild, Nov. Zool., vol. 22, 



p. 304, fig. 4, December 1915 (nee Rothschild, Ectoparasites, vol. i, p. 58, 



fig. 63, June 1915). 

 Ctenopsylla adelpha Wagner, Akad. Nauk S.S.S.R. Zool. Inst., Parazitol. 



Sbornik (Mag. Parasitol. Mus. Zool. Acad. Sci.), Leningrad, vol. i, p. 147, 



pi. 13, fig. 90 (part), 1939. 

 Peromyscopsylla adelpha Jellison and Good, U. S. Publ. Health Serv., Nat. 



Inst. Health Bull. 178, p. 121 (part), 1942. — Hubbard, Fleas of western 



North America, p. 336 (part, female is hesperomys adelpha), 1947. 

 Peromyscopsylla draco Hopkins, Ann. Mag. Nat. Hist., ser. 12, vol. 4, p. 541, 



1951. 



Head (fig. 43) . — Similar to hesperomys except : frontal angle much 

 more marked, head less rounded above and below this angle than in 

 hesperomys (fig. i) ; genal lobe (G.L.) less than one-half length of 

 lower genal spine; second segment of antenna with row of apical 

 bristles usually less than one-half, sometimes three-fourths, length of 

 club ; in female three-fourths length of club. 



Thorax. — As in hesperomys, except mesonotum without erect 

 bristles dorsally. 



Abdomen. — As in hesperomys. 



