( fioO ) 



nnmeroiis. The loun-est bristle of tlie second liimltursal segiueiit reaches to the 

 apex of the third. The iirst hindtarsal segment is one-eighth sliorter than the 

 hindtibia. The fifth segment bears five bristles on each side. The measurements 

 of the tarsi are as follows : — 



Modified Segments. — The eiglith sternite of the S is large, and bears ventrally 

 before tlie middle on each side five to eight bristles. The eighth tergite is small. 

 The clasper (PI. XV. fig. 88, CI.) is large, oblong, bearing a row of bristles at the 

 ajiical edge, and several longer ones dorsally near the base. On the innerside 

 the clasper bears a patch of short slender hairs. The finger (f) is elongate half- 

 moon-shaped, bearing a row of slender hairs at the distal edge and some very short 

 ones on the side. The ninth sternite (PI. XVL fig. 88, i.\. st.) is very peculiar, being 

 curved upwards at the end, this apical portion bearing at the distal edge long 

 thin hairs. The tenth segment is conical, being more than twice as long as broad, 

 the sternite bearing three long bristles at the apex. 



The eighth tergite of the ? (PI. XVI. fig. 89) bears one hair above the 

 stigma and another small one below it. The bristles on the ventral half are very 

 numerous, as shown in the figure. The stylet is slightly bottle-shaped, being about 

 three times as long as broad. 



Length : S and ?, 3-6 mm. 

 We have fifteen specimens o: 

 Brooks, as follows : — 



* 2 SS, Calgary, Alberta, Canada, is. August, I'.Mi] 



* 3 ??, „ ' „ „ ,. " „ 



* 3 ? ?, Neresall, British Columbia, November 190U 



* 1 S, Calgary, Alberta, Canada, 21. August, 19(M). 

 » o o 2 



* \ S, type, „ „ „ 27. 

 1 " , 1, 11 '1 11 11 II 



t 1 c?i Mabel Lake, British Columbia, 2. May, 1902. 



I 1 ? , ,1 ,1 ., 11 11 11 1 



this species, collected by Messrs. Dippie and 



I'dtoriKS ricliartlsoiii. 



11 II 



11 II 



lonyieauddtHS. 



11 '1 



II 11 



II II 



Afit.^fi'l" amrricdim. 



37. Ctenopsyllus hygini sjiec. nov. (PI. XV. fig. S:") ; XVI. fig. 93, 94). 



Head.— The head of this si)ecies is similar to that of C. hrooksi. The bristles 

 on the posterior part are, however, less numerous. 



Thorax.— The prothorax bears one row of bristles and a comb of twenty-four 

 (?)or twenty-eight (c?) spines. On the mesonotum there is one row of bristles, and 

 on the metanotum two rows. The ei)imerum and ei)isternum of the mesothorax 

 bear together fonr ])ristles. The episternnm of the metathorax bears one long 



• Collected by Mr. Ci. F. Dippie, of Calg;iry, Alberta, Canada, 

 t „ ,, Mr. Allan Brooks. 



