the HydroptilidcB. 143 
" The head slightly inflated, with two rounded tubercles 
close to the occiput. Antennai slightly more distant than 
is usual in the species of this genus, stout, as long as the 
body. Wings very narrow, pointed. Legs rather strong, 
the posterior pair long. The colour is wholly of a luiiform, 
rather dark, blackish-brown ; the Avings brownish, with 
brown pubescence, and with long grayish-brown fringes ; 
the feet dark brown, with grayish hairs on the posterior 
thighs. (The individual has lost its abdomen, but is other- 
wise in good condition.)" 
" Madeira." [After Ilagen.] 
The specimen is now in rather worse condition. Besides 
the abdomen, it has lost its head, one antenna, and both 
of its intermediate legs. The joints of the antennre are 
rather longer than is usual. The wings are as broad as 
those of a Phrixocoma ; the inner margin of the anterior 
Aving appears to be destitute of an appendage, and, ac- 
cording to Dr. Hagen, the ocelli are Avanting. A figure 
of the neuration of the Avings sent by him in a letter to 
Mr. M'Lachlan (from A\diich I obtained information of the 
Avant of ocelli), exhibits conformity to the neuration of 
Orthotrichia angustella, excepting in the presence of a 
cross-veinlet in the middle of the anterior wing. I am 
inclined to consider this only a point of secondary import- 
ance, liaAang met Avith a similar specific difference of neura- 
tion in the genus ItUytrichia. Therefore I have no doubt 
that H. atra is referrible to Orthotrichia, because the 
absence of ocelli, the form of the antennas and anterior 
wings, and the neuration of the wings, do not admit of its 
being otherAvise disposed of. 
Dr. Hagen, in his letter above alluded to, states that 
a Madeiran species of Hydrojitilida Avith ocelli Avas for- 
merly present in Mr. Wollaston's collection. The only 
specimen Avas of small size, and Avas lost by an accident in 
the course of Avorking. 
Mr. M'Laclilan possesses anotlier specimen of an un- 
described Orthotrichia from the same island. Being un- 
able to figure the appendices I do not describe it. 
Genus OxYETHiRA, nov. gen. 
Neuration, PI. II. 5 ; 5 a, posterior Aviug. 
Derivation. — (Gr.) Oxu-etheiros, Avith sharp-pointed 
hair. 
Imago. Antenna; in the male half as long as the Avings, 
