62 THE ENTOMOLOGIST S RECORD. 



due to the hours spent with Chaiioine Favre, Pi'ofessoi- Blachier, 

 Colonel Agassiz, Messrs. Pison, Sloper, Wullschleyel, Lemann, and 

 others, who have put time and information and collections at my 

 disposal. 



Some New Nearctic Fleas {ivith plate). 



By The Hon. N. C. ROTHSCHILD, B.A., F.L.S. 



Pitlex ursi, sp. nov. (Fig. !•). — The rostrum reaches to the middle of the 

 trochanter, and the end segment of the palpus is about twice the length of the 

 preceding one, being a little longer in the male than in the female. The head, 

 which is clothed with short hairs, is feebly but evenly rounded in the male, but 

 angled in the female. There are four long bristles between the eye and the maxilla, 

 standing in a row, preceded by a series of three shorter ones. Near the posterior 

 edge of the head there is a series of long bristles, and between these and the 

 antennal groove there are two series of four and three (or three and two) somewhat 

 shorter ones. The prothorax bears no comb, having only a subapical series of 

 bristles ; the meso- and metanotum bear in addition to the subapical bristles, a 

 postmedian series. The metathoracic episternum bears a number of bristles, and 

 the epimeron is furnished with a subapical series of nine, which are placed close 

 together, the series being preceded by one or two less regular rows. The plates 

 of the abdominal segments are small, the tergites bear two rows of bristles, 

 sometimes exhibiting some irregularly placed hairs in addition ; the series is 

 reduced in number, however, on the distal segments. The seventh tergite lacks 

 the dorsal apical hairs usually present in so many species. The eighth tergite of 

 the female is completely divided in the mesial line, it is, moreover, large, dilated 

 ventrally, and rather densely clothed with hairs above and below the stigma, as 

 well as upon the broader ventral portion. The anal tergite of the female lacks 

 the two processes usually present in Ptdc.r and other genera. The eighth 

 sternite of the male does not essentially differ from the seventh, while in the 

 female it is I'educed to a mere chitinous strip. This resemblance between the 

 seventh and eighth sternites in the male of the present species is most peculiar ; 

 in fact, in this character, the present species differs from all other members of the 

 group Siphonaptera that I know of. The sternites bear a single row of hairs. 

 The mid- and hind-coxa? are densely clothed with hairs in front. The femora 

 bear two stout spines at their ends, and in addition to the rather long hairs on 

 their dorsal edges, there is a more or less regular longitudinal ventro-lateral series 

 on each side. The tibiae bear six pairs of very stout spines at their dorsal edges, 

 and exhibit, besides, a lateral row of bristles. The tarsi are clothed with stout 

 bristles, their segments being short, except the apical one — the fore-tarsus, the 

 first four segments gradually decrease in size, the first being a quarter longer than 

 it is broad ; the bristles on all of these four tarsal segments are subapical ; the 

 first segment, moreover, has, in addition, an externo-lateral pair of bristles in the 

 middle ; the for.rth segment is calyx-shaped, with strongly rounded sides. The 

 iiiid-tar;;u3 is similar to the pro-tarsus, except that its first four segments are 

 somewhat longer, the first segment being about half as long again as it is broad. 

 The basal segment of the hind-tarsus is about twice as long as it is broad, the 

 fourth segment is barely different in size and shape from that one of the mid- 

 and pro-tarsus. The end segments of all the tarsi are of nearly equal size, being 

 about twice as long as they are broad ; they have four stout spines on each side and 

 an apical hair, with two apical ventral bristles in addition. A portion of the genital 

 armature of the male is drawn in fig. 1. The clasper (c) is broad, roun<led ventro- 

 distally, and covered with numerous bristles at its ventral and distal edges, with a 

 few on the disc as well. The manubrium (m) curves slightly downwards at the 

 end, while the movable finger (f) is small and shaped like half a crescent. 



I have received a large series of this fine new species from Mr. G. 

 F. Fippie, taken from the Grizzly Bear [Ursun hurribilis) on April 29th, 

 1901, -45 miles west of Calgary, Alberta, Canada. 



Ti/jjItlopsyUa ijrdiulU, sp. nov. (Fig 3). — A very large species. The head, the 

 frontal and dorsal portions of which are covered with short hairs situated in 

 punctures, bears two genal spines of unequal length. The pro-notal comb consists 

 of 20 teeth. The first four abdominal tergites bear rudimentary combs of two or 



