310 PROCEEDINGS OF THE NATIONAL MUSEUM vol. loi 



and east of Albuquerque. We also have one specimen from C. s. 

 major trapped just west of the Rio Grande near Bernalillo, N. Mex., 

 on February 21, 1948. 



THRASSIS CAMPESTRIS Prince, 1914 



Thrassoides campestris (Prince, 1944) Hubbard, 1947, p. 146. 



This form has been taken from Dipodomys ordii (Woodhouse), 

 collected near the U. S. Route 66 bridge over the Rio Puerco and 

 about 18 miles west of Albuquerque, on February 28, 1949, and 

 from nesting materials and food storage of Dipodomys spectabilis, 

 taken just east of Albuquerque, on March 6, 1948. 



DIAMANUS MONTANUS (Baker, 1895) 



This flea was found on Citellus varicgatus grammurus, taken at 

 the Juan Tabo Recreation Area, about 15 miles northeast of Al- 

 buquerque, on June 26, 1948. 



(?) MALARAEUS SINOMUS (Jordan. 1925) 



Since no males are present in the collection certain separation 

 cannot be made between M. sinomus (Jordan, 1925) and M. eremi- 

 ciis (Baker, 1904) . Two females have been taken from Peromyscus 

 maniciilatus, collected just west of the Rio Grande, near Bernalillo, 

 N. Mex., on March 12, 1948. 



MONOPSYLLUS WAGNERI (Baker, 1904), subspecies undetermined 



A subspecific determination based entirely on females is so un- 

 certain that none has been attempted. Five females were taken 

 from Peromyscus maniculatus, collected just west of the Rio 

 Grande, near Bernalillo, N. Mex., on March 12, 1948. 



Family HYSTRICHOPSYLLIDAE Tiraboschi, 1904 



ATYPHLOCERAS ECHIS Jordan and Rothscliild, 1915 



Numerous fleas of this species have been taken from an animal 

 and a nest of Neotoma micropus canescens, collected near the base 

 of the Sandia Mountains, about 5 miles east of Albuquerque, during 

 December 1947. 



MEGARTHROGLOSSUS BISETIS Jordan and Rothschild, 1915 



Figure 66, c-g 



Hubbard (1947) reduces this species to a subspecies of M. 

 divisus (Baker, 1898). A short description is given here of the 

 previously undescribed male. 



Head : One row of four bristles on gena, short ones alternating 

 with very long ones (these bristles are not always in a straight 

 row) , also a few small bristles above this row. Postantennal region 



