( loO ) 



one inclnded, aad bears on the onterside a row of five hairs, the iunerside being 

 devoid of hairs. The longer Ijristle of the sabapical dorsal pair is as long as, or 

 shorter than, the tibia is broad. The longest dorsal apical bristle of the midtibia 

 reaches bej'oiid the second tarsal segment. The tarsi have scarcely any hairs on the 

 ventral surface. The first segment of the midtarsus is longer than the second. 

 The longest apical bristle of the first hindtarsal segment reaches to the apex of the 

 second, while that of the second segment extends to the claw. The fourth hind- 

 tarsal segment is a little longer than it is broad, and the fifth is shorter than the 

 second. The first pair of bristles of the fif'tli tarsal segment is quite ventral, 

 standing in between the second pair. The measurements of the mid- and hindtarsi 

 arc as follows : — 



Modified Segments. — The apex of the seventh sternite is slanting and feebly 

 emarginate. The eighth tergite bears no bristles above the stigma and only one 

 below it, there lieiiig a ]iii(ch of bristles ventrally at the apex (PI. VIll. fig. 26). 

 The eighth sternite is sharply pointed, bearing a few extremely small hairs at 

 the apex. The anal tergite has comparatively few bristles, which are slender, there 

 being no spine-like ones as in most other species. The stylet is feebly curved down- 

 wards at the base. 



Length : ? , 2-4 mm. 



We have three ? ? of this insect from Mabel Lake, B. ('.., May 6th, l'JU2, from 

 Spermopldlus columbianus, collected by Mr. Allan Brooks. 



The fusion of the metathoracic notum with the epimerum, and of the sternum 

 with the episternnm, is a peculiar character which this species shares with C.dicisus 

 Baker. In the latter species, however, the fusion is not so far advanced, the 

 ejiisternal suture being indicated and there being a bristle present on the piece 

 tlius imperfecttly separated from the sternum. The vestige of the suture between 

 the notum and the ejiimerum is also more distinct in dicistis. In C. iynottm Baker, 

 which agrees with diciisux and the new species in having the eye vestigial, no 

 such fusion in the metathorax has taken place. 



5. Ceratophyllus bacchi spec. uov. (PI. IX. fig. 34). 



\\\' know only the S of this species. 



Head. — The frontal tubercle is distinct. There are a row of three bristles 

 and some minute hairs in front of the eye, and before that row one bristle at 

 the oral edge and another at the antennal groove. The hinder part of the head 

 bears a row of eight or nine short hairs above the antennal groove and a single 

 lateral bristle before the middle. The second bristle of the subapical row is reduced 

 to a small hair. Tiie rostrum reaches to the base of the femur, the last segment 

 being not (piite twice the length of the last but one. 



Thorax.— The jirouotum bears a comb of sixteen or seventeen spines. The 



