( le^ ) 



angle with a thin bristle above it, while the second is placed halfway between the 

 first and third. The finger is emarginate between the first and second spines. The 

 ninth sternite is similar to that of quiriiii. 



Length : S , 2-8 mm. 



We have two SS of this species, collected by Mr. G. F. Dippie :^ 



1 c?, Canadian National Park, Alberta, August 17th, 1899. Putorius longi- 

 cauil'itiiit. 



1 S, Horse Greek, Upper Colnmbia Valley, B. C, October 13th, 1903. Microtis 

 drummondi. 



9. Ceratophyllus euphorbi spec. nov. (PI. VI. fig. 11). 



Head. — In front of the three eye-bristles there is a single bristle near the 

 antennal groove, and a second smaller one further upwards. On the occiput there 

 are three bristles along the antennal groove between the long ventral subapical 

 one and the base of the antennal groove. The second bristle of the subapical row 

 is absent, the interspace between the long ventral bristle and the next being large. 

 The rostrum reaches to the end of the trochanter, the last segment being twice the 

 length of the penultimate one. 



Thorax. — The pronotnm bears a comb of nineteen spines. On the mesonotum 

 there are two rows of bristles, with a number of additional hairs on the back. 

 At the base the mesonotum bears two irregular rows of short hairs, and before the 

 apex, on each side, a row of five hair-like spines. The mesothoracical sternum 

 bears abont ten hairs. On the metanotum there are two rows of bristles and one 

 or two additional dorsal bristles close to the anterior row. The metanotum bears 

 one spine on each side. The epimerum of the metathorax has four or five bristles 

 (1.2.1., or 2.2.1.). 



Abdomen. — The tergites bear two rows of bristles and two or three additional 

 bristles on the back close to the anterior row. This anterior row is not complete 

 on tergites 4 to 7. The lowest bristle, which is small and stands above the 

 stigma, is separated from the next by a wide space. The seventh tergite has one 

 long apical bristle, accompanied on each side by a minute hair. The first sternite 

 bears one rather long bristle, the other sternites three, there being no hairs in front 

 of these bristles. 



Legs.— The forefemur has about nine hairs on the outer surface. The mid- 

 femur bears on the inner side two, the hindfemur three bristles, there being none 

 on the outer surfaces. There are two lateral rows of bristles on the outer side of 

 the mid- and hiudtibiae, and a row of five or six on the inner side of the hindtibia. 

 The first foretarsal segment bears two long slender bristles on the hinder side, the 

 apical one nearly reaching to the apex of the second segment. The lateral bristles 

 of the hindtarsus are rather hairy, the longest posterior apical one reaching beyond 

 the base of tlie subapical pair of the second segment. The measurements of the 

 mid- and hindtarsi are as follows :— 



