CIDARIA.—HYDRIOMENA. 163 
4. Cidaria (?) damo, sp.n. (Tab. LVI. figg. 8, 3; 9, 2.) 
Male. Primaries greenish-white, white from the end of the cell almost to the outer margin, with a wide brown 
band near the base crossing from the costal to the inner margin, beyond which are several brown marks 
and small broken black lines, a submarginal broken brown band edged with a black line on the inner 
side extending from the apex to the anal angle, the veins along the outer margin each with a small 
brown streak on either side ; secondaries creamy-white, crossed below the middle from the costal to the 
inner margin by a very indistinct waved greyish line, the fringe greyish; the underside greyish-white, 
the primaries with dark markings as above, but much less distinct: head and thorax greenish-white, the 
antenne and palpi black, the abdomen and legs pale brown, the abdomen with a black spot on the 
middle of each segment.—Female. Very similar to the male, but much more deeply coloured. Expanse, 
— 13, 2 2 inches. 
Hab. Mexico, Milpas in Durango 5900 feet (Forrer), Real del Monte in Hidalgo 
(M. Trujillo). 
Allied to C. pomponia, from which it may be easily distinguished by its white hind 
wings. 
5. Cidaria cyriades, sp.n. (Tab. LVI. fig. 10, 3.) 
Male. Primaries pale green, crossed near the base from the costal to the inner margin by three brown bands, - 
which are wider in some specimens than in others, and with two brown marks close to the apex, and 
several brown spots along the outer margin close to the anal angle, the fringe alternately green and 
brown ; secondaries white, with a fine brown streak on each side of the veins round the outer margin, 
the fringe white; the underside white, the primaries with dark markings as above, but much less 
distinct: head and thorax greenish, the antenne, palpi, abdomen, and legs pale brown.—Female. Very 
similar to the male, but with the markings on the primaries rather larger, darker, and more distinct. 
Expanse, ¢ 1,3, 2 14 inch. 
Hab. Mexico, Coatepec (Brooks), Las Vigas (coll. Schaus). 
We figure a male from Coatepec. An example of the same sex in Mr. Schaus’s 
collection is rather smaller than ours. 
HYDRIOMENA. 
Hydriomena, Hiibner, Verz. bek. Schmett. p. 3822 (1816) ; Packard, in Report of the U.S. Geol. 
Survey of the Territ. x. p. 90, t. 1. fig. 6 (neuration). 
Ypsipetes, Stephens, Nomencl. Brit. Ins. p. 44 (1829); Guenée, Sp. gén. des Lép. x. p. 376; 
Walker, Cat. xxiv. p. 1266. 
This genus is represented in our region by seven species, two of which are common 
to Europe and North America. The Central American representatives are mostly 
from a great elevation. 
1. Hydriomena sordidata. (Tab. LVI. figg. 11-15, 3, 16, 9, vars.) 
Phalena sordidata, Fabr. Ent. Syst. iii. 2, p. 185°. 
Hydriomena sordidata, Pack. in Report of the U.S. Geol. Survey of the Territ. x. p. 96, t. 8. 
fige. 31, 34, 35°. 
Geometra elutata, Hiibn. Europ. Schmett., Geom. t. 48. fig. 224, t. 74. figg. 381-385 °. 
Ypsipetes elutata, Guen. Sp. gén. des Lép. x. p. 878*; Walk. Cat. xxiv. p. 1267’. 
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