[868.] 83 
Genus Oligoneuria, Pict. 
Type, O. anomala, Koll. Mss. ; Pict. 
The typical species has two simple ulnar ribs, and two simple* vasa 
.nterna. 
Distrib. — Brazil, 1 sp. 
Section B, 0. Bhenana, ImhofF. 
The robust anterior and the slender second ulnar ribs are bipartite, 
rhe divisions (veins) of the second rib closely accompany the first and 
:he third ribs respectively. From this last a slender vein is sent to the 
nternal margiia. Between these ribs and veins a very coarse reticula- 
;ion is obscurely indicated. The anterior vas internum accompanies 
;he third ulnar rib and its vein : the posterior is very short, and has 
}wo strong veins and a feeble one. The ulnar ribs are connected 
jogether by a few cross-veinlets. The ^ has four-jointed forceps, 
vhose proximal joint is upwards of twice the length of the remaining 
;hree together. 
Distrib.— Central Europe, 2 sp. 
Section C, O. Trimeniana, McLachlan. 
The first and the third ulnar rib is bifid ; the second is obsolescent 
md bipartite, as in 0. Bhenana. The anterior division of the second 
•ib emits a veinlet nearly parallel with the posterior division of the 
irst rib, which vanishes before it attains the outer margin, and is met 
)bliquely by the cross-veinlets of an obscure coarse reticulation that 
)ccupies the space between the two most prominent ribs. There are 
,wo simple vasa interna. 
Distrib. — Natal, 1 sp. ( ? only known). 
Genus CAMP8UBUS,t nov. gen. 
Syn. Palingenia, Burm., Pict., part. 
Type O. latipennis, "Walker. 
Distrib. — The Amazons, 6 sp. 
The first ulnar rib is bipartite ; its bifurcate anterior division includes 
I simple supplementary vein; its posterior division separates into an 
mterior simple, and a bipartite veinlet. The second ulnar rib is bipar- 
ite, and is produced over the third rib to anastomose with the common 
* I am inclined to regard the first of these an ulnar ; but hare followed aboTe M. Pictet's explana- 
ion of the neuration, not having seen the type. 
t Campsurus (Qr.)— Kampse-oura = bent-tailed. 
