NO, 4 FLEA GENUS PEROMYSCOPSYLLA — JOHNSON AND TRAUB 53 



Micromys minuUis, by L. V. Fedorova. Around Khabarovsk it has been collected 

 by N. L. Gershkovich. 



As can be seen from our copies of Skalon's 1950 figures and the 

 above description, ostsibirica is very close to P. longiloha (Jordan, 

 1939)- ^^ idiCt, longiloha is considered below as a subspecies of 

 ostsibirica (Skalon, 1936). Since specimens of ostsibirica ostsibirica 

 are not available for study, a more complete comparison of hamifer ssp. 

 and ostsibirica ssp. is given in the discussion of ostsibirica longiloba 

 (Jordan, 1939), new combination. 



The male differs from ostsibirica longiloba in that the eighth 

 sternum (fig. 122, 8S.) is not apically subrectangular ; the posterior 

 margin being obviously oblique and the ventral margin evenly con- 

 cave ; not with this segment apically subrectangular, with the posterior 

 margin almost vertical and the ventral margin almost straight (fig. 

 85). Other details of the modified segments are apparently the same 

 as in 0. longiloba. The female is apparently indistinguishable from 

 0. longiloba (compare figs. 123 and 84). 



PEROMYSCOPSYLLA OSTSIBIRICA LONGILOBA (Jordan, 1939), 



new status 



Figures 83-86, 119 



Leptopsylla hamifer longiloha Jordan, Nov. Zool., vol. 41, p. 319, fig. 270, 1939. 

 Peromyscopsylla hamifer longiloha Hubbard, Fleas of western North America, 

 pp. 336, 337, fig. 20s, 1947. 



Head. — As in hamifer, except apical bristles on second antennal 

 segment one-half length of club in male, three-fourths length of club 

 in female (not three-fourths and one-fourth, respectively). 



Thorax and abdomen as in hamifer except : female with five to 

 seven antepygidial bristles (of two females examined, one had seven 

 on both sides, the other had six on one, seven on other; the original 

 description states that the holotype had seven bristles on each side, the 

 paratype five on each side). 



Male. — Differing from hamifer in the following points: movable 

 finger or digitoid of clasper (fig. 86, F.) roughly forming an isosceles 

 triangle, with obtuse angle at middle of posterior border. Eighth 

 sternum (fig. 85) definitely rectangular; dorsal and ventral borders 

 parallel ; bearing marginally five to six bristles, three of these set on 

 mesal surface and quite long, other two or three medium-sized, set 

 on margin itself ; one medium-sized bristle may be present anterior 

 to lowest long bristle ; several very minute hairs in posteroventral 

 corner; membranous process (M.P.) large, spiculated. Distal arm of 



