in the Basin of the Amazons. 253 



common stem, the third and fourth separating half-way. Hind 

 wing : costal and subcostal uniting at a point close to the base, 

 then diverging again ; costal straight to the apex ; subcostal with 

 two branches ; first median branch from before the centre ; second 

 and third from lower end of cell ; disco-cellular very obscure ; 

 radial from its centre. 



34. Atopomorpha singularis, n. s. 

 Fore wing pale ochreous, varied with grey, brown, and yellowish ; 

 a curved blackish line near the base more strongly marked on the 

 inner margin ; a sinuous oblique dark line beyond the middle, 

 running nearly parallel to the hind margin, preceded by a broad 

 brownish shade, and followed by a white line ; all three more 

 strongly marked on the inner margin ; submarginal line narrow, 

 whitish, sinuous, most distinct towards the costa, preceded and 

 followed in its upper half by a brownish shade, preceded in its 

 lower half by a sinuous, ochreous, curved blotch, and followed by 

 a dark patch ; a dark blotch at the apex, underneath which is a 

 triangular ochreous-white spot ; orbicular stigma yellowish, out- 

 lined with darker ; reniform stigma hemispherical, with a darker 

 centre. Hind wing grey-brown, darker throughout the basal half; 

 the pale edging of the second line in the fore wing continued across 

 the hind wing, but straight, not sinuous ; hind margin dark fuscous 

 towards the costa, towards the anal angle ochreous yellow mottled 

 with darker, and with two dark brown patches. Fringes of both 

 wings (apparently) ochreous mottled with darker ; abdomen greyish 

 ochreous, the segments darker. Under side whitish ochreous, 

 dusted with yellowish ; both wings with a dark central spot and 

 fascia ; the hind wing with a diffuse second fascia towards the 

 hind margin, containing a darker blotch towards the anal angle ; a 

 series of marginal limules before the base of the fringes more 

 distinct than above. Expanse of wings, 30 mm. 



One $ , from Para, March 10th, 1875. 



A very peculiar-looking insect, resembling in some 

 respects a distorted Macaria ,- the junction of the costal 

 and subcostal nervures of the hind wing near the base 

 is likewise characteristic of the Geometrina ; on the 

 other hand, the presence of the two stigmata is more 

 indicative of a Pseudo-deltoid. In the absence of all 

 the mouth-parts, however, its proper position must be 

 left undecided. 



