Saturniidae 
genera Hemileuca and Pseudoha^is, the antennae of the males 
are singly bipectinated. In the. former genus the females have 
bipectinated antennae; in the latter the females have the antennae 
serrate, or very feebly pectinated. 
Genus COLORADIA Blake 
(i) Coloradia pandora Blake, Plate X, Fig. 8, $ . (The 
Pandora Moth.) 
The range of this insect is from the eastern foot-hills of the 
Rocky Mountains to the Cascades, and from Montana to Mexico. 
Genus HEMILEUCA Walker 
Eight species of this genus are known from our territory, 
four of which we figure. H. electra Wright has the hind wings 
more or less red with a black border. H. grotei is a black 
species with a white collar, and a series of narrow white spots 
covering the middle of the wings, three on the fore wing, and 
those on the hind wing composing a narrow median band. 
H. neumoegeni is a beautiful insect with snowy white thorax and 
reddish brown abdomen. The wings are snowy white with 
orange discal marks crossed by two black bands on the pri¬ 
maries and one on the secondaries, the inner line of the primaries 
being relieved externally by an orange spot bordered with black. 
H. hualapai Neumoegen has the wings dull pink, either without 
markings, or crossed by two pale lines. The form with the pale 
transverse lines has been dubbed sororius by Henry Edwards. 
(i) Hemileuca maia Drury, Plate XI, Fig. i, $. (The 
Buck-moth.) 
Syn. proserpina Fabricius. 
In the fall of the year, when the leaves are falling and the 
days are still mellow and warm, the Buck-moths may be seen 
flitting through the air at noonday. They especially frequent the 
edges of groves of oaks. Upon the twigs of these trees, as well 
as occasionally upon willows, wild cherry-trees, and hazels, they 
deposit their eggs in clusters, as represented in Figure 44. The 
larvae, which are gregarious and have stinging spines or bristles 
upon the somites, hatch in the latter part of April or in May, 
according to latitude, and after undergoing five molts, pupate in 
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