65 



round and round the person carrying the bird. Males whicii have^ 

 perhaps, gone astray while seelcing a female are occasionally met with ; 

 thus at Brockenhurst, in the New Forest, on Ma)' 26th, 1894, '^ male 

 was caught on the wing by Mr. C. O. Waterhouse ; and the Museum 

 collection also contains another male, taken b}- Colonel Yerbury, at 

 Porthcawl, Glamorganshire, S. Wales, on July 1st, 1903, on a hotel 

 window. This species shows great indi\idual variation in size, as 

 also in coloration ; freshly caught or living indi\'iduals arc often quite 

 green. 



Ornitliomvia avicularia appears to ha\e been carried by birds all 

 over the world ; the Museum possesses specimens from, among other 

 localities, Tristan. d'Acunha I., in the South Atlantic ; Launceston, 

 Tasmania ; and New Zealand. The species also occurs in New South 

 Wales, where, as also in Tasmania, it exhibits a remarkable change of 

 habit, since it is parasitic on the kangaroos known as wallabies 

 {Haliiiatitrns i-nfiioUis, Desm., and H. pariyi, Kenn). 



CjrENUS 



LIPOPTENA, 'Nitzsch. 



Lipoptena cervi, Linn. 



Plate 33, male : Plate 34, fig. i, female. 



This species is parasitic upon several species of deer, including 

 the roe, red, and fallow deer, and also, in Scandinavia, upon the elk 

 {Alces alecs, Linn.) ; in Great Britain its chief host is the roe 

 {Capnolus caprcolns, Linn. j. On emerging from the pupa both sexes 

 possess wings, which, in the case of the female at an)- rate, as soon as 

 the insects reach the host appear to break off close to th-e base, leaving 

 stumps as shown in Plate 34, fig. i. Specimens of both sexes found 

 upon a roe are usual!)- in this wingless condition, in which they often 

 present a superficial resemblance to the " Sheep Tick " (^Melopliagus 

 ovinits, Linn. — Plate 34, fig. 2), though the)- can easily be dis- 

 tinguished b)' the possession of wing-stumps. In the autumn months, 



E 



