134 ZYG.EXID.E AND BOMBYCID.E 



clearly distinguishable. Eyes black. Palpi brownish black. An- 

 tennas white, pectinations black, Abdomen white, with a lateral row 

 of black spots, clothed with long hairs above, which almost obscure a 

 series of dusky transverse markings. Legs white, tarsi dusky ; the 

 anterior pair have the coxce and femora clothed with bright red hairs 

 inwardly, while the tibiae and tarsi are black on the front edge. 



Anterior wings pure silky white, with the cosia very straight, and 

 four indistinct transverse rows of very minute black dots, many of 

 which are frequently wanting. The ist is basal and generally con- 

 sists of three dots, one on the costa, one on the median, and one on 

 the submedian vein ; the 2nd consists of four dots, one of which lies 

 at the base of the 4th median nervule ; the 3rd row lies across the 

 nervules and consists of geminate spots on each nervule ; the 4th is 

 submarginal and very indistinct. 



The posterior wings are also pure silky white, with a discal dot, 

 and traces of a submarginal row all black, the latter being indicated 

 by a dot near the anal angle, and another on the outer margin near 

 the apex, both of the latter being sometimes supplemented with minor 

 dots. The three principal dots are larger than any on the anterior 

 wings. 



Beneath pure white ; the principal black dots present, being two on 

 the costa and one on the discal vein on the primaries ; one on the 

 costa, one on the discal vein and one near the anal angle on the 

 secondaries. 



? . The female resembles the male except that it is larger, with 

 fewer black dots on the wings, and wants the long white hair on the 

 abdomen, which consequently shows the four black transverse bands, 

 and the black central spot on the terminal segment very distinctly. 



Expanse of Wings, $ 1.75 ? 1.90 inches; letjgth of body, i 0.70 

 ? C.80 inch. 



Habitat. — California. (Coll. Edwards, Behr, Stretch, Strecker, 

 Mus. Comp. Z06I. Cambridge. ) 



This beautiful species does not appear to be rare in the neighbor- 

 hood of San Francisco where it is found in May. The larva feeds on 

 a species of Echinocistus, and though common, is exceedingly diffi- 

 cult to raise, as they almost always die about the third moulting. In 

 its early stages the larva has a general olive greenish tint, as I am 

 informed by Mr. H. Edwards. The imago is frequently attracted by 

 the house and street lights. 



