170 
PSYCHIDAE 
MANATHA NIGRITA sp. nov. (Pl. IV, Fig. 3). 
Size and general color of Eurycyttarus 
confederata G. & R. but slightly duller 
black and eyes much larger. Primaries 12 
veined, 1 b and 1 c anastomosing, former 
with single branch to inner margin, 4 and 5 
either connate or shortly stalked, 8 and 9 
stalked, 7 either from a point with 8 and 9 
or shortly stalked, 10 and 11 free from cell, 
II occasionally anastomosing with 12; secon- 
daries with 8 veins, 4 and 5 either connate 
or stalked, apparently no crossbar between 
7 and 8. Expanse 16-18 mm. 
Hasirat. Everglade, Fla. (Apr. 8-15). 
Ft. Myers, Fla. (Apr. 24-30). 7 6. Type, 
Fig. 2.  Venation of Manatha Coll. Barnes. 
nigrita. 
The species may be at once distinguished from confederata 
G. & R. by the venation, all veins being present. As is usual in this 
family, considerable variation is evident in the point of origin of the 
various branches; our Everglade specimens all show vein 7 of pri- 
maries from a point with 8 and 9; in one of the Ft. Myers specimens 
it is shortly stalked and a long series before us from Brownsville, 
Texas, of what is apparently the same species agrees with this latter. 
Hampson’s definition and figure of the genus Manatha Moore (Moths 
Brit. Ind. I. 297/8) would cover our species with the exception that 
nigrita lacks the cross-bar between veins 7 and 8 of secondaries in 
all specimens examined. Our species cannot be edwardsii Heyl. as 
that author distinctly states in the description that the secondaries 
have only 7 veins. 
The sacks were found quite abundantly in both Everglade and 
Ft. Myers on the dry stalks of last year’s grass and from these most 
of our specimens were bred. The sack is very similar to that of 
confederata but is much finer in quality, being composed of small 
pieces of grass firmly woven together, the whole thatched with short 
longitudinal pieces of the grass-stems. The larvae evidently feed on 
coarse grasses. 
