NO. 1361. REVISION OF AMERICAN SIPHONAPTERA—BAKEJi. 4( )*> 



live or six luistlcs on second antennal joint shorter than third joint. 

 Disk of vortex hack of middle of antennal gToove with one laro(;, 

 stout bristle and two small ones. Hind margin of head with the 

 usual bristles, a small supernmnerary bristle occurring just below the 

 large one at each lower angle. Labial palpi (>xtending to one-fourth 

 of anterior femora. 



Pronotum with a transv(a-se row of about twelve unusually stout 

 bristles on posterior third and on hind margin a ctenidium of about 

 twenty stout spines. Meso- and metanotum each with two rows of bris- 

 tles on postei'ior half, the posterior row of about ten larger bristles, the 

 anterior of a somewhat greater number of smaller ones. Metanotum 

 and first three al)dominal tergites each with a small tooth on either side 

 of hind margin. Metathoracic- epiphysis with one ])ristle on hind mar- 

 gin; anterior to this a row containing one large and two smaller ones; 

 still anterior to this row occur two small bristles. Abdominal tergites 

 each with two rows of bristles, the posterior row of about fourteen 

 larger ones, the anterior of fewer and smaller ones. Middle sternites 

 each with four bristles on either side. Antepygidial spines three on 

 each side, the middle one of each group extending to the end of the 

 })ygidium, the inner and outer scared}" half the length of the middle 

 one. Beneath the pygidium on either side occur two large bristles 

 and one small one. The hind margin of eighth segment lateralh' is 

 lined with about six large bristles. 



Style stout, the length not twice the width at base, rapidly narrow- 

 ing to the apex where there is a long bristle; proximad of the apical 

 bristle there is another on the upper margin and'also one on the lower 

 margin. Substylar flap obtuse, with two stout bristles near the apex, 

 and four or five short, stout ones on the lower surface. 



Hind coxa? without minute teeth on inner surface. Hind femur with 

 two small bristles on the side. Apical spines on second hind tarsal 

 joint shorter than the third joint. The third joint of hind tarsi has 

 three groups of spines on either side. First pair of spines on fifth 

 joint of hind tarsi inserted on a line with the others, but bent inward. 

 Lengths of hind tarsal joints in the proportion 25-15-10-5-10.5, 

 licngth, 3.25 mm. Color, clear l)r()wn. 



Male: Head flattened above as usual, the front gently rounded. 

 Antepygidial spines with the central one of each group as in the 

 female, l)ut the inner and outcn- aborted. On the sides the eighth seg- 

 ment is obtusely extended posteriorly, the upper margin of this por- 

 tion with about five stout bristles, none on the lower margin, but a 

 luunber on the disk. Lateral portion of ninth tergite with a slender 

 thumb-shaped h)})e, which is twice longer than wide, the two bristles 

 over insertion of claspers standing very close together. 



The upper claspers are large, subrectangular a})Ove the thick pedicel, 

 the rectangular portion about twice longer than wide and twice the 



