22 PROCEEDINGS OF THE CALIFORNIA 



The young larvas, which are quite black, with very long hairs, appeared on 

 May 5th, the eggs having been deposited on April 24th. The mature form of 

 the larvae is described in Stretch's "Zygaeindae and Bombycidae of North 

 America," page 88. 



Spilosoma vestaHs. Packard. 



Egg. Laid in compact masses upon the food plant. Color, cream white, 

 surface slightly wrinkled, the wrinkles when viewed through a powerful lens 

 appearing to be a series of punctures. Eggs deposited May 15; larvae emerged 

 May 21st. 



Young Larva. On exclusion from the egg the larvae are dirty greenish 

 black, with the head large, and the hairs remarkably long. After second 

 month, the body becomes whitish green, with the head slightly pitchy. The 

 2d, 3d, 4th, 6th, 7th, 8th, 9th and 10th segments have four small blackish tuber- 

 cles, armed with whitish spines laterally, and blackish ones dorsally. The 

 5th and 11th segments have still larger black tubercles. The dorsal region 

 is darker than the sides, which generally have a yellowish tint. Feet and 

 legs, greenish white. After the third month, the whole of the lateral hairs 

 become bright chestnut brown, almost deep orange; those of the dorsal 

 region darker brown, and beyond the 4th segment anteriorly, and the 10th 

 posteriorly, the hairs of the dorsal tubercles are black; the tubercles also be- 

 come hidden by the hairs. Subsequent to the fourth moult, the whole of 

 the dorsal hairs are largely and broadly black, and the lateral series bright 

 chestnut brown. In this condition, the larva may be readily mistaken for 

 that of Spilosoma acrea. 



Mature larva. Body slate black, glossy. Dorsal bunches of spines, rich 

 velvety black; those of the lateral region, bright chestnut brown; under- 

 side, ash color. The spines are all very glossy and rich in color. 



Length, 1.75 inch. 



Food plant, various sp. of Lupinus. 



The larva? were fully fed in the early part of July, being exceedingly vora- 

 cious, though able to exist for four or five days without food, and suffering no 

 apparent inconvenience. About the 10th of the month, they began to spin 

 cocoons, mixing up with their webs the remains of leaves and stems of their 

 food, the whole of eleven larvae which I carried successfully to their last 

 stage, changing almost on the same day to the condition of chrysalis. The 

 perfect insect is usually met with in April, and in warm seasons as early as 

 March. 



Pseudohtzis eglanterina. Bdv. 



Egg. Ovate, stone color, agglutinated together, and arranged in a compact 

 mass around the stem of the food plant, generally near the extremity of the 

 branches. The eggs are attached by their smallest end, the larvas. escaping 

 from the apex. 



Mature Larva. Head black, shining, with a few short, brownish hairs. 

 Body entirely dull black. Each segment is armed with six lateral spines, 

 very finely branched, and two dorsal fascicles of spines, bright chestnut 

 color, blackish in the centre. The branchlets of the spines are all bright 



