( in ) 



Modified Segments. — The deep siuns of the seventh steniite (PI. VI. fig. 12) 

 reminds one of Ceratophi/lhcs newsteadi Rothsch. The eighth tergite bears two 

 long and several short bristles below the stigma. There are two or three long 

 bristles at the apex of the segment, besides two short stont ones. The patch of 

 bristles situated near the ventral edge contains fifteen to eighteen bristles. 



Length : 27 mm. 



We have two specimens from Eed Deer, Alberta, Canada, April Htli, 1901, 

 and Angnst 21st, 1901, found on Microttis dnimmondi h\ Mr. G. F. Dippio. 



15. Ceratophyllus pollionis spec. nov. (PL IX. figs. 28, 31, 32). 



Head. — The head of this species is qnite peculiar (PI. IX. fig. 31). The 

 front is rotnndate-angnlate, especiall)' in the S . The eye is situated near the apex 

 of the genal process. There are three rows of bristles on the frontal part of the 

 head, the eye-row consisting of two bristles, of which one is situated at the antennal 

 groove and the other at the genal edge. The second row consists of four bristles, 

 the most ventral ot which stands behind the palpus. The third row, containing six 

 bristles, stands in front of the palpus. There are also some small hairs before the 

 eye. On the posterior part of the head there are a complete subapical row of 

 bristles, an oblique median row, and a few additional bristles behind the base of the 

 antennal groove. The rostrum is much shorter than the anterior coxa, the fifth 

 segment of the labial palpus being half as long again as the fonrth and twice as 

 long as the third, but shorter than the first. 



Thorax. — The pronotum bears on each side a row of five or six bristles, behind 

 which there is a row of very small hairs. The pronotal comb consists of eighteen 

 to twenty spines. The mesonotum bears, besides the two ordinary rows of bristles, 

 rather numerous hairs on the basal half, and has three long thin subapical spines, 

 of which two are dorsal, while tiie third stands near the ventral edge. On the 

 metanotum there are two rows of bristles and a row of three or four hairs situated 

 in front of them on the back. There are also one or two apical spines on each side. 

 The metathoracical episternum bears three bristles, while there is only one on the 

 sternum. 



Abdomen. — The abdominal tergites bear a few hairs in front of the two 

 ordinary rows of bristles, and the first four tergites have one or two apical spines 

 on each side. There are three af)ical bristles on the seventh tergite, the ventral one 

 not being much shorter than the middle one, while the dorsal one is about half the 

 length. The sternites of segments 3 to 6 bear in the t? a row of three or four, in 

 the ? of five or six bristles standing close together. In front of this row there are 

 a few short hairs. The seventh sternite bears a row of about five bristles in the S , 

 and about seven in the ?. 



Legs. — There is only one bristle posteriorly at the apex of the mid- and 

 hindcoxae. The hindfemur bears one or two lateral hairs on the outer side situated 

 on the basal half. The hindtibia lias a row of hairs on the outer side, there being 

 on the basal half two to four additional bristles between this row and the dorsal edge. 

 The bristles of the second, fifth, and apical doisal pairs of the hindtibia are long 

 and heavy. There are three single stout bristles between the fifth and sixth pairs, 

 the sixth pair standing close to the apical one. The tarsi bear, besides the lateral 

 liristles, numerous ventral ones which arc arranged iu two more or loss regular rows 

 on the mid- and liindtarsi. The first liindtarsal segment is four-fifths the length of 



