370 HETEROCERA. 
examples show considerable variation. In our country it is fairly common, and the speci- | 
mens from the more northern localities are the darkest. Owing to the sexes being so 
different on the upperside, the insect has been described under four different names; 
but with the series before me I have no doubt that they all belong to one very variable 
species, 
The locality for L. nycteis was unknown to Guénée®; but Walker’ subsequently 
called examples from the West Coast of America and San Domingo by that name. 
4. Letis xylia. 
Letis zylia, Guén. Sp. gén. des Lép. vii. p. 153'; Walk. Cat. xiv. p. 1264. 
Hab. Mexico 1 *, Coatepec (Brooks), Cordova (Riimeli), Jalapa (Schaus); GUATEMALA, 
San Gerénimo, Volcan de Atitlan 2500 to 3500 feet (Champion).—VENEZUELA 2. 
This insect is common in Mexico. The wings are similarly marked in both sexes. 
5. Letis fusa. 
Letis fusa, Guén. Sp. gén. des Lép. vii. p. 151°; Walk. Cat. xiv. p. 1265”. 
Letis aptissima, Walk. Cat. xiv. p. 1272°. 
Hab. Mexico, Paso de San Juan (Schaus), Coatepec (Brooks); Panama, Chiriqui 
(Arcé, mus. D.; Ribbe), Volcan de Chiriqui (Champion).—Cotomsia, Bogota ; ANTILLES, 
St. Thomas ! 2. 
A distinct, well-marked, and apparently rare species. The specimen from an unknown 
locality described by Walker under the name of Letis aptissima® is, without doubt, 
the female of L. fusa; the latter may prove to be not distinct from Noctua magna, 
Gmel. 
6. Letis vultura, sp.n. (Tab. XXXII. figg.13,29.) 
Male. Primaries and secondaries dark ochraceous-brown; the primaries clouded with darker brown near the 
apex and on the inner margin near the anal angle, and crossed from the costal to the inner margin by five 
indistinct zigzag dark brown lines, the orbicular and reniform spots dark brown edged with black, a 
waved marginal black line extending from the apex to the anal angle; the secondaries crossed from the 
costal to the inner margin by several indistinct waved lines and with a wide dark-coloured submarginal 
band edged on the outer side with a pale ochreous line, the outer margin edged with two narrow waved 
black lines; the fringe of both wings dark brown; the underside greyish-brown irrorated with black 
scales, with the lines very similar to those above: head, thorax, and abdomen above dark blackish-brown, 
beneath considerably paler in colour; antenne and palpi dark brown; legs pale brown. 
Female. Primaries pale ochreous-brown, clouded with dark brown at the apex along the outer margin and at 
the anal angle, the basal half of the wing crossed by faint zigzag brown lines; secondaries dark brown, 
with a wide pale ochreous band extending from near the apex on the costal margin to the inner margin; 
both wings with a submarginal black waved line extending from the apex to the anal angle; the under- 
side as in the male: head, thorax, and abdomen dark brown, the collar and the base of the abdomen paler 
brown, the underside and the legs greyish-brown, the antenn@ and palpi dark brown. Expanse, ¢ 32, 
Q 32 inches. 
Hab. British Honpuras (Blancaneaux); GuatTeMA.a, Volcan de Atitlan 2500 feet 
(Champion); Panama, Volcan de Chiriqui 4000 to 6000 feet (Champion). 
