( 15S ) 



of the dorsal bristlos of the himltiliia and the apical bristles of the hiiidtarsal 

 segments. 



We have a large series of this iusect, as follows : — 



(?c?,Okanagan, B. C, Ajiril 17th, 1!H|-,'. Mcpliitissjjissiyrada. (Allan Brooks.) 



^ ^ * ) )) J) T? ') )) J> JJ »1 



lU SS, „ „ March :i5th, l'.M}2. Arctomi/sJ^afiee/Ucr atarus. (Allan 



Brooks.) 



•5 ? ? , Okaiiagau, B. 0., March '^hi\i, l'.i(i2. Arcfomi/s Jlaciccntcr amrus. 

 (Allan Brooks.) 



1 ?, Sumas, B.C., March 1903. Putorins rncn/uiHcnos. (Allan Brooks.) 



1 ?, Eagle River, Sicamous, September Oth, HH)3. Vains latraiif. (G. V. 

 Dijipie.) 



4. Ceratophyllus terinus spec. uov. 

 (PI. VIII. fig. 26 ; IX. fig. 29). 



A very pale species, allied to C. divisus Baker, but differing in having a 

 very much shorter rostrum. It is distinguished, moreover, by the complete fusion 

 of the metathoraoical episteruum with the sternum, and of the epimerum with the 

 notnm, as well as by other characters pointed out below. 



Only the ? is known. 



Head. — The acute frontal tubercle is situated in a groove. The vestigial eye 

 is nearly horizontal, being halfmoon-shaped. There is a row of four bristles across 

 the eye, and another row of four immediately in front of it. The hinder part of the 

 head bears one bristle behind the base of tiie antennal groove, and two or three in 

 the middle. There is one long bristle near the ventral posterior angle, not two as 

 in (.'. igiiotiM. The rostrum is shorter than the forecoxa. 



Thorax. — The prouotum has a comb of eighteen to twenty spines. The 

 thoracieal tergites bear one row of bristles only. The mesoaotum has, moreover, 

 a very few minute hairs at the base, and three or four hair-like spines before the 

 ape.x. There are one or two bristles on the raesosternum. The metathora.x is 

 very characteristic of this species (PI. IX. fig. 21)). The metanotnm has no 

 apical si)ine. The metathoracic episternum is completely fused with tlie sternum, 

 the suture being absent. The portion of the plate thus formed which corresponds 

 to the episternum is narrow. There are no bristles on this plate. The meta- 

 thoracic epimerum is fused with the uotum ; but here the suture between the two 

 plates is vestigial in front and behind. The epimerum bears five bristles (1.3.1.), 

 sometimes six. 



Abdomen.— There is only one row of bristles on the abdominal tergites. The 

 first tergite bears four or three apical spines on each side, the second one, the third 

 also one or no spine. On the seventh tergite there are three apical bristles, of which 

 the ventral one is two-thirds the length of the middle one. The basal sternite is 

 without hairs, while the following four sternites bear three or four, and the sternite 

 of the seventh segment five, on each side. 



Legs.— The hindcoxa is rounded, its width being about three-fourths the length 

 of the meral suture. There are hardly any hairs on the hindcoxa, except at the 

 apex and at the anterior edge from the apex to the middle. Posteriorly at the 

 apex there are two bristles standing very widely apart. Tliere are no hairs on the 

 lateral surfaces of the femora. The hiudtibia has six dorsal incisions, the apical 



