ACADEMY OF SCIENCES. 121 



Regular Meeting, October 16th, 1876. 



Dr. Blake in the Chair. 



Donations to the Museum: From C. F. Kirchner, specimen of 

 silver ore; from G. A. Treadwell, variegated copper ore, from 

 Mexico; from Dr. J. L. Ord, three specimens of Monterey mar- 

 ble; from C. D. Gribbes, specimens of coal, gypsum, conglome- 

 rate, terra alba, gum demar, catechu and chrome iron; from 

 Henry Edwards, specimen of serpentine; from J. W. Glass, two 

 specimens of quartz containing asbestos, also specimen of cat's- 

 eye; from Wm. McGillwray, Indian mortar and pestle from Big 

 Panoche Valley; from R. H. Stretch, a cabinet containing about 

 600 specimens of minerals. 



A special vote of thanks was given to Mr. Stretch for his fine 

 donation. 



Pacific Coast Lepidoptera.— No. 18. Description of a New 

 Species of Heterocampa (Larva and Imago). 



BY HENRY EDWARDS. 



The following interesting species was detected by me in the fall of last 

 year, feeding upon willows, in the neighborhood of Mt. Shasta, making the 

 second of the genus now known to inhabit California: 



Heterocampa salicis, n. sp. Hy. Edwards. 



Larva, Mature. Ground color, bright golden yellow with subdorsal, longi- 

 tudinal bands of clear white. Head, bright vermillion red, rather small, 

 grooved in centre, with a small fovea in front. Second, third, and fourth 

 segments, with broken black lines, those on the sides occasionally edged with 

 white, each segment with two long spinous tubercles. Fifth segment, bright 

 vermillion red, much swollen dorsally, and beariug eight spinous tubercles. 

 The remaining segments are all striped longitudinally with slightly waved 

 black lines, broken up on the sides into a series of dots. Anal segment, with 

 ten warty spinous tubercles, without white, and all the lines obsolete. Feet 

 and legs, yellow, spotted with black. Mouth parts, black. Spiracles, very 

 small, black. Each of the warty tubercles is furnished with a single dirty 

 white hair. 



Length, 1.25 inch. 



