Geometridae 
(3) Euchceca lucata Guenee, Plate XLIV, Fig. 6, £. (The 
Woodland Black.) 
The insect is distributed from western Pennsylvania and West 
Virginia to Illinois, and northward to Manitoba. It is not rare 
about Pittsburgh. 
Genus HYDRIA Hiibner 
(1) Hydria undulata Linnaeus, Plate XLII, Fig. 34, ?. (The 
Scallop-shell Moth.) 
This neatly marked species is found in both Europe and 
America. It is the only species of the genus in the United States. 
Genus PHILEREME Hiibner 
The species of this genus are all Western in their habitat. 
(1) Philereme californiata Packard, Plate XLII, Fig. 36, £. 
The specimen figured was taken on the slopes of Mt. Shasta. 
Genus EUSTROMA Hiibner 
This is quite an extensive genus found in both the New World 
and the Old. Of the nine species recognized thus far as occurring 
within the United States, we figure three. 
(1) Eustroma diversilineata Hiibner, Plate XLII, Fig. 42, £ . 
(The Diverse-line Moth.) 
The moth is not at all uncommon in the Appalachian subregion. 
(2) Eustroma prunata Linnaeus, Plate XLII, Fig. 53, £ . (The 
Plum Moth.) 
Syn. ribesiaria Boisduval; triangulatum Packard; montanatum Packard. 
The insect is found in both Europe and North America. 
(3) Eustroma atrocolorata Grote, Plate XLII, Fig. 43, £ . 
(The Dark-banded Geometer.) 
A denizen of the Appalachian subregion. It is one of the most 
beautiful of the geometrid moths found in the Atlantic States. 
Genus RHEUMAPTERA Hiibner 
A genus of moderate size, the species of which are found in 
the temperate and boreal regions of both hemispheres. 
(1) Rheumaptera hastata Linnaeus, Plate XLII, Fig. 40, £, 
Fig. 41, $, var. (The Spear-mark.) 
The species is very variable, and half a dozen forms have been 
named. The only differences existing between these forms are 
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