Modified Segments, — <i . Tlio eighth strniite is sliort, tini;'('r-like, niid lii'iirs 

 from three to six verj' long bristles at the apex and often some small hairs 

 proximally of them (PI. VIII. fig. 'Si, viii. st.). The process of the claspur is 

 triangular, being short and broad. The finger has an almost evenly rounded distal 

 margin. It bears one long hair above the middle and three shorter ones fartiier 

 down, besides a number of smull ones, as shown in the figure (PI. VJII. fig. 23). 

 The two hairs at the junction with the clasper stand rather widely apart from one 

 another. The manubrium is curved ui)wards at the end and sharjily pointed. 



?. The seventh sternite of the ? is trnneate, being very feebly emarginate. 

 The bristles of the eiglith tergitc arc distributed as shown in the figure (I'l. \'ill. 

 fig. 22). 



Length : S, 2-8 mm. ; ?, 3'1 tu ;1'4 mm. 



We liave a large scries of this species from : — 



1 S, Bantf, Alberta, Canada, July Uth, Is'.ili. Mountain ( 'hipnninU. ((i. V. Dippie.) 



9 2 9 



■^ + ■*■ J V n )» J? )> 11 11 11 11 



11 11 l-'tb, „ ,, ,, „ 



„ Aug. 2r'>tli, „ Says' Mountain Chipnmnk. „ 



11 11 ^1 n 11 11 11 11 



„ July 5th, „ Mountain (Jcipher. „ 



11 11 11 11 11 11 11 



„ 2Sth, ,, Spciiiiopliiliix rohiinbiaiitis. „ 

 1 3, Canadian National Park, All)erta, Aug. IGth, ISDO. (O. p. Uippie). 

 1 i, Alberta, Canada, Oct. 21st, IDilO. I'Ntnriits Ifliu/iriuiJii.t/iH. ,, 



■^ * J 11 11 11 11 11 11 11 11 



1 (?, San Francisco, Mts. Flagstaff, Ariz(nia, July 2flth, 1897. Sciuruii alirrti. 

 (Dr. Kunze.) 



4 ? ?, San Francisco, Mts. Flagstaff, Ari/.ona, Jidy iJ'ith, 18'.»7. Sciurua nhi'rti. 

 ^Dr. Kunze.) 



5 ii, (iolden,P,. (_;., June 18th, 10ii-2. YelidW-licilied Jhirinot. (W. AVeninann.) 



'*■♦¥) )' » 11 )i )) 11 11 '-' 



3. Ceratophyllus acamantis spec. uov. (PI. VlTl. figs. 24,2.")). 



Head.— There is a distinct frontal tubercle. The eye-row consists of three 

 bristles, of which the u]ij)er two stand close togetiier, the second being sometimes 

 replaced by a small hair. Anterior to this row there is one bristle at the oral edge, 

 and in most malea a hair at the antennal groove. On the hinder part of the head 

 there is only one lateral bristle besides the subapical row, the bristle standing in 

 the middle above the antennal groove. The rostrum is very long, reaching to the 

 apex of the anterior femur. 



Thorax. — The jironotal comb consists of eighteen to twenty sj)ines. The 

 mesonotum liears laterally at the base one row of minute hairs (tliese liairs being' 

 much more numerous on the back), and has on each side a row of six or seven 

 slender subapical spines. The metanotum bears, like the mesonotum, two rows of 

 bristles, the first row containing less tluin ten on the two sides together. There are 

 two apical spines on each side. The metathoracical ej)isternum bears three bristles, 

 seldom four, while the sternite possesses only one. On the epimerum there are 

 three or four bristles. 



Abdomen. — There are two rows of bristles on each tergite, Tcrgitcs 1 to 4 have 



