1907.] 



]1 



of claval area ; wings hyaline, the venation pale fuscous ; vertex strongly ridged at 

 lateral margins, and with a faint central pale carination ; pronolum angularly emar- 

 ginate at posterior margin ; face strongly tricarinate ; clypeus medially and laterally 

 carinate ; first joint of antennae long and broad, broadly centrally ridged on each 

 side, second joint more than half the length of first ; apical spine to posterior tibiae 

 long and robust ; (egminal veins more or less granulose. 



Long. excl. tegm., 4 to 5 mm. ; exp. tcgin., 11 to 14. mm. 

 Hah : Darjiling, 3100 feet. Found attacking Bamboos. 



Steene House, Selhurst Road, 



South Norwood, S.E. : 

 December Qth, 1906. 



V/<r/ 



A NEW BRITISH FLEA. 

 BY THE HON. N. CHARLES EOTHSCHILD, M.A., F.L.S. 



Ceratophyllus borealis, sp. nov. 

 A pale species. The rostrum reaches to the apex of the fore coxa. The meso- 

 notum has numerous small hairs between the base and the 

 post-median row of bristles. The mesothoracic epimerum bears 

 four bristles (2, 2), the metathoracic epimerum having five 

 (2, 2, 1), a small hair in addition standing at the stigma. 



The first abdominal tergite, like the metanotum, has three 

 rows of bristles, and anterior of them there are a few more 

 hairs. 



The other abdominal tergites bear three rows of bristles 

 on each side, the anterior one consisting of four or five bristles 

 only, on each side, there being anteriorly of it one or two more 

 hairs representing a fourth row. 



The sternites of segments 3 to 5 bear a row of three or 



four bristles and a row of a few small hairs. The sternite of 



the sixth segment has a row of five bristles. The hind femur 



bears a lateral row of three or four bristles on the inside, besides the subapical bristle. 



The principal differences between this species and its allies are in the shape of 



the seventh sternite (fig. VII st.). This is truncate, with the upper angle produced 



into a lobe. 



We have one female specimen of this species, for which we are 

 indebted to Mr. Nurmau H. Joy. It was taken on the Island of St. 

 Kilda iu July of this year, and probably came from the nest of a 

 gannet {Sula hassana). 



Tring Park, Tring : 



December, 1906. 



