Odonata from Ecuador. 29 
3. Adult. Both pairs of wing totally brilliant shining 
reddish cupreous (very slightly paler at the extreme 
base), iridescent, transparent, and without markings of 
any kind; neuration reddish, the costal vein blackish 
up to the nodus. Legs dark piceous; the femora brown 
internally. Appendages as is usual in the genus; the 
apical portion slender. 
3. Immature. Paler. The cupreous tint of the 
wings is wanting, and they are almost golden. Ptero- 
stigma pale greyish brown in yellowish veins. Neura- 
tion yellowish ; the costal vein blackish. 
?. Adult. The wings tinged as in the male, but the 
colour is less brilliant. Slghtly beyond the nodus is a 
transverse, somewhat narrow, opaque band (scarcely 
reaching the inner margin), brownish ochreous in 
colour, somewhat cuneiform, nearly straight (but ob- 
lique) in the anterior wings, slightly curved in the pos- 
terior. 
Length of abdomen, male, 34—44 mm.; female, 
29—31 mm. Length of posterior wing, male, 30—40 
mm.; female, 29—30 mm. LExpanse, male, 65—86 
mm.; female, 63—66 mm. 
Fifteen males and four females. 
This beautiful species is certainly the most remark- 
able of the genus, in consequence of the brilliant cupreous 
tinge of the wings, which in the male have no markings 
of any kind, the opaque band appearing only in the 
female. 
N.B.—There is a single very immature female in the 
collection that I refer to concinna with doubt. The 
wings are pale shining fuliginous, and the opaque band 
is pure white and less cuneiform; the pterostigma 
cinereous. 
Thore mutata, n. 8. 
Very closely allied to 7’. Aurora, Selys (of the Rio 
Napo); differs as follows :— 
The pterostigma is slightly longer and narrower (less 
dilated). The thoracic lines narrower and less bright. 
g. Adult. The band on the fore wings never acquires 
the reddish orange tint of the adult of 7’. Aurora, but 
remains milky opaque white, as in the immature condi- 
tion of that species; moreover, the band is never suc- 
ceeded by a dark coloration of the membrane (the most 
