ON SOME SCOTTISH SIPHONAPTERA 211 



trace of clouding on the discal and posterior cross veins, 

 while the base of the radial vein is always clear. In the 

 present species, moreover, the whole insect is larger, the 

 body being (in the female), 7^ mm. in length and each wing 

 9 mm. 



ON SOME SCOTTISH SIPHONAPTERA. 

 By JAMES WATERSTON, B.D., B.Sc. 



IN August 1905 Mr. Godfrey handed me a couple of Fleas 

 from Orkney, and later in the month, while I was taking Sten- 

 opteryx liirnndinis, Leach, at Coldingham, a number of those 

 insects came under observation. The Hon. N. C. Rothschild, 

 to whom they, were sent, urged me strongly to go on col- 

 lecting, and the results of a year's work are embodied in this 

 paper. 



To Mr. Rothschild's kindness in identifying my captures 

 I am much indebted. I also take this opportunity of thank- 

 ing very heartily the many friends who have sent nests or 

 small mammals for examination, and in particular Mr. Rupert 

 Cochrane, without whose help the list would be considerably 

 poorer. During the year most attention has been paid to the 

 genus Ceratophyllus, Curt., and there chiefly to forms attack- 

 ing birds. In June an effort was made to gain some know- 

 ledge of the species on Microtus orcadensis. Mr. George 

 Ellison, Liverpool, visited Orkney later on the same errand, 

 and has very kindly allowed me to incorporate his records here. 



In mentioning the following species I have tried to give 

 as many localities and hosts as possible, rather than to 

 multiply records. 



PULEX, Z. 



IRRITANS, L. vii.-viii. '05 : St. Kilda, in houses, etc. Mr. Fraser 

 later sent a number of fleas from dogs all proved to be of 

 this species, x. '05 : Model Lodging House, Edinburgh, 

 vi. '06 : Kinbuck, Perthshire. "Swarming in houses." N. B. 

 Kinnear, who forwarded a <. 



CANIS, Curt.- x. '05 : several on slides in University Laboratory, 

 no data (Dr J. H. Ashworth). 25, viii. '06 : a single <J, house 

 in Edinburgh. 



