54 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. I23 



ninth sternum (fig. 83) with a few short apical bristles (as in bi- 

 dentatus) ; posterior margin with three widely spaced marginal 

 bristles, these quite long; patch of basal marginal bristles; laterally 

 with quite small scattered bristles, all restricted to sclerotized portion. 



Aedeagus (fig. 119). — Much as in hamifer. Armature of inner tube 

 reduced, inapparent. Crochets {CR.) much longer than in hamifer, 

 longer than S.I.T. Microverrucae or spicules limited to a small sub- 

 dorsal margin of lateral lobes; the spicules definitely longer than in 

 hamijer. (M.D.L. not visible in only specimen studied, and hence 

 deleted from figure.) 



Female. — Posterior margin of seventh sternum (fig. 84) with long, 

 narrow, subacute lobe followed ventrally by deep, rounded sinus; 

 ventral lobe broader, not extending quite as far posteriorly as dorsal 

 lobe. Anal stylet about 4^ times as long as broad, bearing one long 

 apical bristle and two shorter ventromarginal bristles. 



Holotype. — Female, from Microtus, i-mile camp, Valdez Creek 

 Trail, Alaska. 



The range of ostsibirica longiloba is probably Alaska and north- 

 western Canada. 



Records of Specimens Examined 



From Anchorage, Alaska : One male and two females from Microtus sp., 

 Aug. 10, 1950. One male from Clethrionomys sp., no date given, R. Rausch. 



PEROMYSCOPSYLLA BIDENTATA (Kolenati, 1863) 

 Figures 87-90, 120 



Ctenopsyllus bidcntatiis Kolenati, Hor. Soc. Ent. Rossicae, vol. 2, p. 38, pi. 3, 



fig. 9, 1863. 

 Ctenopsylla (Ctenopsyllus) bidcntata Wagner, Hor. Soc. Ent. Rossicae, vol. 27, 



P- 351, 1893. 

 Ctenopsyllus hidentatus Rothschild, Ent. Month. Mag., vol. 45, p. 185, 1909. 

 Ctenopsyllus sobrinus Rothschild, Ent. Month. Mag., vol. 45, p. 186, p. 2, 



fig. 3, 1909; Nov. Zool., vol. 16, p. 332, 1909. 

 Ctenopsyllus bidentatns Rothschild, Ann. Sci. Nat., Paris, zool. ser. 9, vol. 12, 



p. 215, 191 1. 

 Ctenopsyllus monoctenus Kolenati, in Rothschild, Nov. Zool., vol. 18, p. 56, 



191 1 (sinks bidentatus and sobrinus). 



Ctenopsyllus sobrinus Dampf, Schr. Phys.-okon. Ges. Konigsberg, vol. 52, p. 277, 



1912 (claims monoctenus not available because not binary). 

 Ctenopsyllus hidentatus Jordan and Rothschild, Ectoparasites, vol. i, p. 62, 



1920 (state monoctenus Kolenati, 1856, is new name for sciiiri of authors). 

 Leptopsylla bidentatus Jord.\n and Rothschild, Ectoparasites, vol. i, p. 113, 

 fig. Id, 1920, 



