28 HETEROCERA. 
2. Cathegesis tridentella, sp. n. (Tab. I. fig. 24.) 
Antennae cinereous, annulate with brownish. Palpi with the median joint slightly tufted above at its apex, 
the terminal joint longer than the median, slightly recurved, divergent ; cinereous, banded with grey ish 
brown at the end of the median joint, on the middle of the terminal joint, and again narrowly before 
the apex. Head brownish cinereous; face scarcely paler. Thorax brownish grey. Forewings brownish 
cinereous, shaded with greyish brown along the costa, except at the base and on the apical fifth ; this 
darker shading is diffused downward as far as the middle of the fold, and in a broken and diluted form 
reaches the dorsum and extends outward to above the tornus, where it is terminated by a pale anteapical 
band sinuate inward below the costa and outward above the tornus, the somewhat pale apical space 
containing three dark fuscous tooth-like streaks; cilia pale cinereous, with a greyish brown shade 
running along their middle. Exp. al.13 mm. Hindwings broader than the forewings, trapezoidal, scarcely 
sinuate below the apex; brownish grey; cilia pale cinereous, with a darker shade running through 
them before their middle. Abdomen brownish grey, anal tuft inclining to ochreous. Legs pale brownish 
cinereous, 
Type 3 (65743) Mus. Wlsm. (Godm-Salv. Coll.). 
Hab. Mexico: GUERRERO: Amula, 6000 ft., VIII. (H. H. Smith). Unique. 
SYSTASIOTA, gen. n. 
(cvoraowrns =a partisan.) 
Type: Systasiota leucura Wlsm. (Tab. I. fig. 25.) 
uw 49 i) 








J. H. Durrant, del. 
8. Systasiota leucura Wism.  ¢. 
Antennae 2, simple ; basal joint without pecten. Labial Palpi slender, recurved, smooth; the terminal and 
median joints about equal in length. Mawillary Palpi rudimentary. Haustellum well-developed. Ovelli 
present. Head and Thorax smooth. Forewings elongate, widening somewhat outwardly, costa subsinuate, 
apex caudate, termen sinuate, tornus rounded: newration 11 veins; 7 and 8 coincident, to costa ; 2 and 3 
stalked. Hindwings 1, apex obtuse, termen subsinuate: neuration 8 veins; 3 and 4 short-stalked ; 
5 radial; 6 and 7 truncate. Abdomen smooth. Legs smooth; hind tibiae slightly hairy above. 
Derived from Holophysis W1sm., which it much resembles in general structure and 
appearance ; it differs in the coincidence of FW: 7-8, and the caudate apex. 
Drepanoterma W\sm. differs in its longer antennae, and more developed palpi with 
shorter terminal joint. 
