Lepidoptera of the Amazons. 381 
lines, the first at basal two-fifths sinuous, the second and 
third subparallel, angulated, the third submarginal, 
broken up into spots and >-shaped lines; fringe with a 
whitish basal line; antenne and crest silvery white ; 
wings below greenish white ; body silvery white ; expanse 
of wings, 7 lines. 
Rio Jutahi, 27th January, 1875. At light. 
A second specimen, apparently conspecific, though 
faded white, was obtained at Pupunha, Rio Jurua, on the 
1st November, 1874. 
The following corrections should be made to this 
family :—Geometra subvectaria, Walker, is Numia buxaria, 
Guenée ; G. factaria is N. terebintharia, Guenée, and 
G. difissa and subcelata are also species of Numa; G. 
reciprocata, viridiluteata, dimissa, luteoviridata, and sub- 
ignita are species of T'anaorhinus (of which G. confuciaria 
is the type) ; Nemoria translucidaria, Herrich-Schiffer, 
would be better placed in Amaurinia, but Thalassodes 
diserta, Walk., which is the Amaurinia rubrolimbaria of 
Guenée, should be referred to Thalera; Chlorochroma 
congenita, Walker, is the female of his C. vertwmnaria 
and = Omphax plantaria, Guenée ; C. externa, Walk., is 
also a species of Omphax. 
MECOCERIDA. 
Mecoceras, Guenée. 
85. Mecoceras nitocris. 
Phalena-Geometra nitocris, Cramer, Pap. Exot. iii. 
p. 148; pl. 275, fig. a (1782). 
Forest behind Arimanahy, 9th January; Lake Arapicu, 
Rio Trombetas, 8rd March; Boa vista, Rio Purus, 12th 
September, 1874 ; Manaos, 3rd January, 1875. 
PALYAD. 
OPHTHALMOPHORA, Guenée. 
36. Ophthalmophora formosanta. 
Phalena-Geometra formosanta, Cramer, Pap. Exot. iii. 
p- 92, pl. 247, fig. @ (1782). 
Rio Negro, 4th July, 1874. Taken at light, 
