40 THE CANADIAN ENTOMOLOGIST. 



covered with powdery blue over the whole lateral region up to and 

 including the subdorsal blue dots, and leaving only a kw black mottlings 

 and a subquadrate black patch on each segment laterally, bordered 

 below by an orange dash. Below the spiracles, the blue becomes nearly 

 white, and anteriorly on the segments tufts of silky white hair grow from 

 the skin. Traces of a subventral orange shade. Dorsum black without 

 a dorsal line, the usual pair of orange subdorsal lines narrow and irregu- 

 lar, heavier at the posterior part of each segment. Considerable con- 

 spicuous orange tinted hair grows on the back. 



Food-plant. — Oak ( Quercus Kelioggii). 



Habitat. — The more hilly parts of California. 



Clisiocampa ambisimilis, nov. sp. 



Larva. — Head pale blue, with numerous black spots especially at the 

 vertex ; labrum and basal joints of antennae yellowish-white ; many white 

 hairs. Body black, largely mottled with pale blue-gray at the sides and 

 a series of subdorsal blue dots, two on each segment, the posterior one 

 of which is produced downward into a transverse dash reaching the 

 lateral blue region. A dorsal bluish-white line, much broken, but 

 irregularly so ; in some specimens it is continuous from joint 3 posteriorly, 

 in others widely broken in the segmental incisures or entirely absent. A 

 subdorsal series of waved, broken, orange lines, triple or quadruple on 

 the posterior part of each segment, single anteriorly. A paler broken 

 lateral line just above the blue area. Hair quite dense, keeled slightly 

 dorsally and tufted laterally, red on the back, but silky white on the sides, 

 as in C. const rid a. 



Foodplants. — Fruit trees. 



Habitat. — Santa Cruz Co., California. 



This species occurred to me abundantly on fruit trees at Watsonville, 

 Cal., but the native food-plant was not determined. The larvae are closely 

 related to C. constricta, differing in the presence of the dorsal line (though 

 this is not constant) and in the greater restriction of the lateral blue area, 

 which does not extend up to and enclose the subdorsal dots, as it does in C. 

 constricta. The moths are very different. The $ is rusty brown, with 

 two pale lines, the 9- pale brown, with two darker lines. My specimens 

 are too poor to enable me to give characters to separate the moths from 

 C. californica, which they much resemble ; but the larvae are abundantly 

 distinct. Besides the marked difference in markings, the contrast in the 

 colour of the lateral hairs of the two species is striking. Dr. Packard has 



