BELIDEUS FLAY 1 VENTER. 
Long-tailed Belideus. 
Petaurista flaviventer, Desm. Mamm., p. 269. 
Didelphis Petaurus, Shaw, Gen. Zool., vol. i. p. 496. 
Petaurus (Belideus) flaviventer, Waterh. Nat. Lib. Mamm., vol. ix. (Marsupialia), p. 286. 
australis, Shaw, Nat. Misc., vol. ii. pi. 60. — List of Mamm. in Brit. Mus. Coll., p. 83. 
Didelphys volucella, Meyer, p. 26. 
Petaurus Cunninghami, Gray, MSS. B.M. 
Sciurus Novce-Hollandice , Meyer. 
Didelphys macroura, Shaw, Zool. of New Holl., p. 33. pi. xii. young. — lb. Gen. Zool., vol. i. p. 500. pi. 113. young. 
Petaurus macrourus, Waterh. Nat. Lib. Mamm., vol. ix. (Marsupialia^, p. 288. young. 
Mr. Waterhouse, who has paid considerable attention to the Marsupialia, in speaking of this animal, says, 
“The Hepoona Roo of White’s Journal, the original also of Shaw’s Didelphis Petaurus, is still in existence 
in the Museum of the College of Surgeons ; it proves to be the present species, and not the P. Taguanoides, 
as has always been supposed. This ought therefore to be regarded as the type of Shaw’s genus Petaurus, if 
authors are right in attributing that genus to Shaw ; but I do not perceive that he ever regarded the 
animal in question as constituting a genus, or that he applied the name in a generic sense.” 
This fine species is common in all the brushes of New South Wales, particularly those which stretch 
along the coast from Port Philip to Moreton Bay. In these vast forests, trees of one kind or another are 
perpetually flowering, and thus offer a never-failing supply of blossoms upon which the Long-tailed Belideus 
feeds ; the flowers of the various kinds of gums, some of which are of great magnitude, are the principal 
favourites. Like the rest of the genus it is nocturnal in its habits, dwelling in holes and in the spouts of 
the larger branches during the day, and displaying the greatest activity at night while running over the 
small leafy branches, frequently even to their very extremities, in search of insects and the honey of the 
newly-opened blossoms. Its structure being ill adapted for terrestrial habits it seldom descends to the 
ground, except for the purpose of passing to a tree too distant to be attained by springing from the one it 
wishes to leave. The tops of the trees are traversed by this animal with as much ease as the most level 
ground is by such as are destined for terra firma. If chased or forced to flight, it ascends to the highest 
branch, and performs the most enormous leaps, sweeping from tree to tree with wonderful address ; a slight 
elevation gives its body an impetus, which with the expansion of its membrane enables it to pass to a con- 
siderable distance, always ascending a little at the extremity of the leap ; by this ascent the animal is pre- 
vented from receiving the shock which it would otherwise sustain. 
It is now very generally believed that the Petaurus macrourus is only the young of Petaurus flaviventer ; I 
have therefore placed the former name as a synonym. 
General colour either greyish or yellowish brown ^ head clouded with black, particularly lound the eyes, 
at the base of the ear, on the muzzle and chin ; a black mark extends from the occiput along the middle of 
the back ; the fore and hind legs and the side membrane blackish brown ; edge of the membrane and under 
surface of the body buff; basal half of the tail yellowish brown, the remainder black. 
The sexes are alike in colour. 
The accompanying Plate represents the animal a trifle less than the natural size. 
