NO. 4 FLEA GENUS PEROMYSCOPSYLLA — JOHNSON AND TRAUB II 



Figs. y-io.—Peromyscopsylla hesperomys hesperomys: 7, Modified segments, 

 d'; 8, seventh sternum and spermatheca, $; 9, modified segments, ?; 10, im- 

 movable process and digitoid of male clasper. For explanation of symbols see 

 pages 67-68. 



