100 HORSE AND CATTLE FLIES. 
attached beneath the foot. We have already mentioned that the 
Hippobosea have a similar hair appended to their tarsi.” —(C. De G.) 
This appendage is figured in situ, Plate 16, fig. 27, of the volume 
above quoted, and there shows plainly as a hair, or rather bristle, very 
much bearded with side hairs and placed between the pads (‘‘pelottes’’), 
which are widely expanded to show it, and projecting beyond them for 
about half their length. 
The appearance of this hairy bristle I found to differ greatly 
according to it being viewed in natural condition or in balsam. In 
the latter, instead of the whole length of the many hairs placed along 
the bristle being visible, only the lower portion was clearly noticeable, 
this giving the bristle itself the appearance of being set with short 
spines. The terminal extremity appeared to be not pointed, but 
ending in about five spines, or moderately sharp spine-like tubercles 
(see Plates). 
This hairy bristle is also shown, but only enough magnified to give 
a general idea of its structure, in the figure of the foot of O. avicularia 
in Walker’s ‘Insecta Britannica (Diptera),’ vol. ii. pl. xx. fig. 3d, 
after a drawing by Prof. Westwood. Also Dr. Schiner, in his descrip- 
tion of the characteristics of the genus Ornithomyia, mentions this 
appendage of the foot as projecting like a thread, and slender, but also 
beset with hair.* 
In the course of attention that was directed to the subject of Forest 
Fly in the columns of the ‘ Field,’ and also of the ‘ Veterinary Record,’ 
some notes were given from his own personal microscopical observa- 
tions of the existence of this “‘ bearded hair’”’ as a foot appendage both 
of the Forest Fly and of the “Sheep Tick” (MM. ovinws) by Mr. Thos. 
B. Goodall, F.R.C.V.S., with figures accompanying, in the ‘ Veterinary 
Record’ for May 25th, 1895, p. 686. Mr. Goodall observed :—“ In 
addition to two strong mailed claws there is a plume-shaped body 
situated between the cushions, or pulvilli, beneath the feet, and 
extending to the length of the claws. The same organ may be 
observed in the Melophagus ovinus, or Sheep Tick (which, however, is 
no tick, but a wingless fly). In the latter, however, it is more 
feather-shaped than in the Forest Fly, being, in this insect, tubular, 
and covered with hair-like scales.”—(T. B. G.) 
In the exigencies of newspaper printing, the delicacy of repre- 
sentation necessary for showing minute differences of structure can 
eee. . das Empodiwm ragt fadenformig vor, und ist oben zart, aber dicht 
behaart.’’—See ‘Fauna Austriaca: die Fliegen,’ von Dr. J. R. Schiner, ii. Theil, 
p. 646; and at p. 649 of the same work Dr. Schiner mentions regarding the Melo- 
phagus ovinus (our so-called Sheep Tick), ‘‘ Haft-lappchen”’ [that is, pads or pul- 
villi, Ep.] ‘und Hmpodium deutlich ”’; but, beyond their being ‘“ observable,’’ does 
not give description. 
