412 PROCEEDINGS OF THE NATIONAL MUSEUM. voi,.xxvii. 



bristle, anterior to this a second large one, and still anterior to the 

 second two smaller ones. The hind margin of metanotum and first 

 four abdominal tergites each with two small teeth on either side. The 

 rows of larger bristles on abdominal tergites number al)out as follows: 

 1—14, 11—24, 111—22, IV— 16, V— 18, VI— 2(», VII— 18. Antepy- 

 gidial bristles, three on each side, the central one in each group extend- 

 ing l)eyond pygidium; the outer in each group five-sixths as long 

 as the central, the inner slightl}' more than a third as long. Posterior 

 rows of bristles on abdominal sternites with from eight to sixteen 

 bristles; an anterior row is represented by one or two median bristles. 

 The end of the abdomen is very bristl3\ Beneath the pygidium on 

 either side stand four stout bristles. The tenth tergite is unusually 

 well covered with medium sized and small bristles. 



The style is short and unusually stout, not twice longer than ])road, 

 thickest at middle, but little narrowed at the tip, where there is a long 

 bristle; back of the apical are several shorter bristles. The substylar 

 flap is almost hidden in long strong bristles, and the lateral portion of 

 eighth segment bears man}^ 



The hind coxa? are without minute teeth on the inside. The hind 

 femur has a row of al)out twelve strong bristles on the side. A bristle 

 on either side of apex of second joint of hind tarsi extends beyond third 

 joint. The spines on fifth tarsal joint are arranged in the typical 

 CeraiophyU us. manner. 



Length, 3.75-4 mm. Color, clear brown. 



Male: Head flattened above in the usual manner. Antennal groove 

 reaching upper margin of head. But one long bristle occurs in the 

 antepygidial groups, the other two being aborted. Hind margin of 

 eighth segment above with about eight stout spines, and in front of 

 these are scattered a number others of equal size. Lateral portion 

 of ninth segment with its lobe short, thick at base, and rapidly tapered 

 above to an obtuse point. Apparently only one bristle occurs over 

 the insertion of the claspers. Upper claspers with a stout pedicel, the 

 limb rather large, somewhat reversed thumb-shaped, the rounded hind 

 margin with al)out Ave small bristles. The ventral style is long and 

 dilated toward the tip, where there are two long bristles, the lower 

 margin bearing a row of several smaller bristles. 



Length, 2.75 mm. 



Type.~OAi. No. 6910, U.S.N.M. 



CERATOPHYLLUS PROXIMUS, new species. 

 Plate XIX, figs. 1-5. 



From southern California come only females of another spermophile 

 flea, which difl'er in various characters from any spermophile flea pre- 

 viously examined. Mr. H. G. Hubbard collected it at Palm Springs. 



Female: Head normally rounded from occiput to mouth, with a dis- 



