NO. 4 FLEA GENUS PEROMYSCOPSYLLA — JOHNSON AND TRAUB 49 



PEROMYSCOPSYLLA HAMIFER CUNEATA, new subspecies 

 Figures 124-131 



Types. — From Korea : Holotype male, allotype female, from Apo- 

 demus agrarius, Chip'or-i, Oct. i6, 1952; two paratype females from 

 Microtus fortis pelliceus, Oct. 23, 1952 ; one paratype female, Ch'ong- 

 yang-ni, Oct. 2, 1952 ; one paratype female, Oct. 14, 1952. All col- 

 lected by Field Unit of the Commission on Hemorrhagic Fever, 

 United States Army. Holotype and allotype deposited in the collec- 

 tions of the U. S. National Museum. Paratypes in the collection of 

 Robert Traub. 



Diagnosis. — Differs from other subspecies of hamifer in that the 

 bristles on the second antennal segment are one-half the length of the 

 club in the male ; three-fourths the length of the club in the female ; 

 not three- fourths and one, respectively. Male further separable from 

 h. hamifer and h. vigens in having three long bristles on the eighth 

 sternum, not four or two, respectively. Otherwise very similar to 

 other subspecies of hamifer except as follows : 



Head (fig. 124). — Bristles on second antennal segment one-half 

 length of club in male, three-fourths length of club in female. 



Male. — Eighth sternum (fig. 129) with apex squared; row of three 

 long bristles present on upper half, set well in from margin ; one small 

 bristle below and in line with this row ; plus three small apical bristles 

 on upper half of posterior margin. As in other subspecies, character- 

 istic bristle on posterior margin of process (fig. 131, P.) set well above 

 middle of margin. Movable finger (F.) definitely wedge-shaped, 

 dorsal margin straight ; anteroapical and posteroapical angles similar ; 

 posterior margin almost straight ; anterior margin gently concave. 

 Distal arm of ninth sternum (fig, 128) much as in h. hamifer, with 

 four large bristles at middle of ventral (posterior) margin ; laterally 

 with small scattered bristles on sclerotized portion. 



Aedeagus (fig. 126). — As in the other subspecies, except spiculation 

 on lateral lobes (L.L.) confined to a very small area well above level of 

 insertion of crochets (CR.), and lacking striations below. 



Female. — Lobe on posterior margin of seventh sternum triangulate 

 in holotype (fig. 127, /S.) ; somewhat longer and narrower in para- 

 types (fig. 130). Anal stylet and spermatheca (fig. 125) as in other 

 subspecies. 



Length. — Holotype, 2.0 mm. ; allotype female, 2.5 mm, ; paratype 

 females 2.7-2.8 mm. 



