NOTES ON SOME BLOOD-SUCKING ARTHROPODS. 155 



[^incorporated in the same way. This mixture was quite effective, but the ketones 

 smelt rather strongly and discoloured clean wood-surfaces. 



Later a second formula was tried : I lb. soap, \ gal. water and 1 gal. paraffin. 

 Used pure, this killed almost instantaneously, and not a fly touched escaped. 

 Subsequently, the same emulsion, diluted to half strength, was used and worked 

 excellently, although the flies crawled about sometimes for a minute after being 

 knocked down. None, however, were seen to recover. The use of an emulsion 

 was indicated because of the danger of fire had pure oil been sprayed. The formula, 

 I may add, was purely empirical, and my only object in recording these facts now 

 is to suggest that it may be worth while to investigate the constitution of a suitable 

 emulsion spray for flies, and particularly to ascertain what should be the mini mum 

 oil content of such a mixture. A little clean boiling water should be passed through 

 the nozzle of the sprayer after use, to obviate clogging with dried emulsion. 



Lucilia sericata, Mg. 



Abundant. Reared also from larvae found in carrion on the Struma. This species 

 formed a considerable part of the daily catch in fly traps. 

 Hippobosca capensis, Olf. 



$, Lahana, off mule, ix. 

 Hippobosca equina, L. 



$, Kalamaria, vii ; ] $, Lahana, ix, off mule. Not uncommon in horse and 

 mule lines. Taken also by Capt. Carment. 

 [Olfersia ardeae, Macq. 



A number of specimens of what I believe to be this species were observed on a 

 young Purple Heron (Ardea purpurea) shot on the Giol Ajak about two miles from 

 the top of Lake Ardzan. These flies were extremely active and all evaded capture.] 

 Omitheza ?metallica, Schin. 



$, on partridge (Perdix perdix), Lahana, ix. 



SlPHONAPTERA. 



Pulex irritans, L. 



Kalamaria, Salonika, etc., on dogs. 

 [Xenopsylla cheopis, Rothsch. 



Dr. Jolly informs me that this species has been identified in Paris from examples 

 which he has forwarded from plague-stricken rats dying in Salonika.] 

 Ctenocephalus felis, Bouche. 



Kalamaria, on dogs. 



Acarina. 

 Laelaps echidninus, Berl. 



$, on young rat, Kalamaria. 

 Liponyssus saurarum, Oud. 



A dozen from under the throat-scales of Green Lizard, Lahana, 27.viii. 



For assistance in determining the above-mentioned species I am indebted to the 

 following friends : — Messrs. J. B. Collin, S. Hirst, G. A. K. Marshall, and R. Newstead. 



(C47S) 



