498 LORD WALS1NGHAM ON THE [Nov. 17, 



This genus partakes of the characters of Amo?*bia, Clem., and 

 Platynota, Clem., resembling the first in the different neuration of 

 the male and female, and the latter in the presence of a costal fold 

 in the male. It is also allied to Cerorrhineta, Z., which agrees with 

 Platynota in neuration, hut differs in the structure of the antennae 

 and in the shape of the fold. 



Zeller's type of Tortrix (CEnectra) exustana ( 2 ) is before me, 

 and it is unquestionably the female of Tortrix colubrana, Z., of which 

 the type (J) is also in my collection. Both specimens are from 

 Colombia. The differences in the neuration apparently misled Zeller 

 in supposing them to be distinct, and caused him to refer them to 

 diffeient genera. 



Ptychamorbia catenana, sp. n. 



Antenna: ( 5 ) with the basal joint somewhat enlarged,, simple ; 

 dark reddish brown. 



Palpi projecting more than the length of the head beyond it ; 

 second joint smooth, somewhat thickly clothed above ; apical joint 

 moderate, exposed ; reddish brown. 



Head and thorax reddish brown. 



Fore wings ( 5 ) much arched at the base, straight beyond, apex 

 somewhat produced ; apical margin indented, not oblique; anal angle 

 rounded. Neuration : 12 veins, 7 and 8 from a long common stem, 

 enclosing the apex. Tawny reddish-brown with a very ill-defined 

 basal patch, wider on the dorsal than on the costal margin ; an ill- 

 denned fasciaform shade commencing at one third from the base on 

 the costal margin runs obliquely outwards to the middle of the wing, 

 thence depressed to the dorsal margin scarcely beyond the middle ; on 

 this fascia are some obscure grey metallic spots ; the apical portion of 

 the wing is of the same darker shade as the fascia and contains two 

 curved lines of grey metallic spots, the first running parallel with the 

 central fascia from beyond the middle of the costa to the anal angle, 

 the second again parallel beyond it ; the space between these and 

 the apex is also studded with similar spots ; cilia pale ochreous, 

 with a tawy-brown line along their base. Underside unicolorous 

 shining brownish ochreous. 



Hind wings much excised on the costal margin before the apex* 

 Neuration : 8 veins, 3 and 4 from a point, 5 bent over and nearly 

 tcuching the base of 4. Brownish ochreous, the apex shaded with 

 fuscous scales ; cilia shining pale ochreous, with a brownish shade 

 along their base. Underside unicolorous shining brownish ochreous. 



Abdomen ochreous. 



Legs ochreous ; hind tarsal joints shaded with fuscous. 



Exp. al. 20-28 millim. 



Hab. West Indies — St. Vincent (windward side, 2 specimens, 

 Smith), 



Brazil — Espiritu Santo (Schmidt). 



I have little doubt that the male of this species will be found to 

 possess but 11 veins in the f>re wings, as in T. eolubrana, Z. This. 



[8] 



