42 



SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. I23 



Figs. 87-90. — Peromyscopsylla bidentata: 87, Immovable process and digi- 

 toid of male clasper; 88, seventh sternum, spermatheca, and bursa copulatrix, 

 $ ; 89, eighth sternum, c? ; 90, distal arm of ninth sternum, c?. For explanation of 

 symbols see pages 67-68. 



