6S 
round and round the person carrying the bird. Males which have,, 
perhaps, gone astray while seeking a female are occasionally met with ; 
thus at Brockenhurst, in the New Forest, on May 26th, 1894, a male 
was caught on the wing by Mr. C. O. Waterhouse ; and the Museum 
collection also contains another male, taken by Colonel Yerbury, at 
Porthcawl, Glamorganshire, S. Wales, on July 1st, 1903, on a hotel 
window. This species shows great individual variation in size, as 
also in coloration ; freshly caught or living individuals are often quite 
green. 
Omithomyia avicularia appears to have 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 
(Halmatums nificollis, Desm., and H. parry i, Bonn). 
Genus 
LIPOPTENA, Nitzsch. 
Lipoptena cervi, Linn. 
Plate 33, male: Plate 34, fig. 1, female. 
This species is parasitic upon several species of deer, including 
the roe, red, and fallow deer, and also, in Scandinavia, upon the elk 
(Alecs alces, Linn. 1 ; in Great Britain its chief host is the roe 
{Capreolus capreolns, Linn.). On emerging from the pupa both sexes 
possess wings, which, in the case of the female at any rate, as soon as 
the insects reach the host appear to break off close to the base, leaving 
stumps as show n in Plate 34, fig. 1. Specimens of both sexes found 
upon a roe are usually in this wingless condition, in w hich they often 
present a superficial resemblance to the " Sheep Tick " {Melophagns 
ovinus, Linn. — Plate 34, fig. 2), though they can easily be dis- 
tinguished by the possession of wing-stumps. In the autumn months, 
E 
