NO. 1361. HEVISIOK OF AMERICAN SIPHONAPTEHA— BAKER. 395 



posteriorly truncate. Antennal groove reaching two-thirds the depth 

 of the head, the hind margin with a number of scattering minute bris- 

 tles. The hind margin of the head is provided with tlie usual ])ri.stles, 

 the disk of the vertex with one heavy bristk^ ])eliind middle of antennal 

 groove. Second joint of antenna with al)out a dozen l)ristles which 

 extend beyond third joint. I^abial pali)i extending to more than half 

 of anterior femora. 



Thoracic nota each with one row of 10 to 12 large bri.stle.s and one of 

 smaller. The pronotal ctenidium contains 21 slender spines. 



Al)dominal tergites with three di.stinct rows of bristles, the princi- 

 pal row of 10 to 18 bristles, the minute hairs between these last ver}^ 

 inconspicuous. Antepygidial spines three on each side, two larger 

 unequal and one smaller near the median line. Abdominal sternites 

 with three rows of bristles each, th(» far greater number occurring in 

 the principal row, which has 18 to 20 l)ristles. The eighth tergite 

 laterally bears numerous rather distant short bristles. Just beneath 

 the p3"gidium on either side occur five strong bristles. 



The style is very thick and swollen, with two long stout bristles on 

 the apex, and four or live just before the apex. The substylar flap 

 has several long l)ristles at tip and a luimber of short, stout ones on 

 lower margin. 



Hind coxfc without minute teeth inside. Hind femora with a I'ow of 

 about 10 minute bristles on the side. One of the apical spines on the 

 second hind tarsal joint e([uals in length joint III and half of I Y together. 

 Spines on last tarsal joint of the typical { 'enttophylhix tyi)e. Lengths 

 of hind tar.sal joints in the proportion 20-13-9-5-10. Length 4 nun. 



Male: Head flattened on top as usual. Pronotal ctenidium of 22 

 spines. Eighth abdominal tergite with a number of heavy l)ristles on 

 the upper po.sterior portion, in three rows of 1 each, and with the 

 hind margin incurved. Lateral portion of the ninth tergite with a 

 broad rounded upper lobe, with two widelv separated k)ng bristles 

 over the attachment of claspers. Upper daspers more than twice 

 longer than wide, somew'hat sickle-shaped, but broad and o1)tuse at tip. 

 the hind margin with a few' weak l)ristles. 



Length, 3.25 mm. Color, rich ])rown. darker dorsally. 



%A'.— Cat. No. fllioa. r.S.N.M. 



CERATOPHYLLUS CALIFORNICUS. new species. 



riatf XVII, li-r.-^. .vs. 



There is in the collection one female specimen of a tiea coUei'ted at 

 Mountain View, California, on a field mouse, by Mr. Edward Ehrhorn, 

 which differs from any other mouse flea yet described. 



Head evenly rouiuled from occiput to mouth, the fioutai notch 

 rather low and inconspicuous. Gena with three stout bristles below, 

 the upper row represented by two biistles. one smallei- than the other. 



