DOG FOREST FLY OR SPIDER FLY. 1a 
specimens found on horses and pigeons, respectively, in this island. 
The natives say that the same fly attacks both animals, but this I am 
inclined to doubt. Parasitical insects of many kinds are very abun- 
dant in these islands.’’—(A. H. B.) 
On examination of the plentiful supply of specimens forwarded, 
those from the horse proved to be similar to our Forest Fly, that is to 
say, Hippobosca equina, Linn., of which Prof. Rondani observes that it 
- not only infests horses, cattle, dogs, and other animals, in all parts of 
Kurope, but that he has noticed specimens in the City Museum of 
Genoa and the Bellardi collections which were found in Africa and in 
the Canary Islands.* 
With the Forest Flies were three puparia, of which Mr. Bechérvaise 
noted that the egg-like bodies ‘‘ were deposited by these flies shortly 
after being placed in the bottle.” These were the size and shape of 
the -puparium figured at p. 95. One was still unchanged from the 
white colour with dark emarginate extremity of the puparia just after 
deposit; the two others had partially gained the brown colour. 
Specimens of two other distinct species of Hippobosca—that is, of 
what we call in this country Forest Flies or Spider Flies—were sent 
me from British India. One of these kinds was forwarded as infesting 
dogs in the district of Cachar (Province of Assam, Further India); 
the other kind forwarded from Calcutta as common in Bengal, and, 
although found upon the dog, yet (like our own English Forest Flies) 
much more prevalent on the horse. 
Dog Forest Fly or Spider Fly. Hippolbosca canina, Rondani. 
This species is stated by Prof. Camillo Rondani to be very similar 
to Hippobosca equina, Linn.,t and very easily confused with it, but 
distinguishable amongst other characteristics by its smaller size, paler 
colouring, and likewise the scutellwm (the small transverse portion of 
the fore body immediately preceding the abdomen) being wholly above 
of an ivory-white colour, not rusty or rusty-red at the sides, but the 
central parts with a yellowish-white tinge. ‘The veins of the wings of 
a reddish, not black tint. 
* *Muscaria Exotica Musei Civici Januensis.’ Observata et distincta a Prof. 
Camillo Rondani. Fragmentum iy. p. 164 (separate impression, p. 15). Estratto 
dacli Annali del Mus. Civ. di Se. Nat. di Genova, vol. xii. 29, 30, Marzo, 1878. 
t For description of H. equina see p. 97. 
t For scientific investigation I add the distinguishing characteristics verbatim 
as given by Prof. Rondani :— 
“ Hf, canina, Rondn.—Sp. similis equine Lin. et cum eadem facilius confun- 
denda, sed distincta, statura, minore, pictura pallidiore, et precipue colore scutelli, 
