Saturniidae 



genera Hemileuca and Psettdoha^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. neumcegeni 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 NeumcEgen 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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