14 ZYGCENID^ AND BOMBYCID^ 



The precise locality in which the specimens were taken, which Mr. 

 Lorquin forwarded to Dr. Boisduval, and from which the descriptions 

 of Boisduval and Grote were drawn up, has not been preserved. Boisd- 

 uval states that he received the chrysalis from Mr. Lorquin, and that 

 they were disclosed in Paris, but does not know the plant on which the 

 larvae fed. Mr. Henrv Edwards took one specimen in July, near Yo- 

 semite Valley, California, at an altitude of nearly 8,000 feet ; and I 

 have seen one specimen captured by T. Mead, Esq., in Colorado Ter- 

 ritory, on the Rocky Mountains. It seems probable that, as we 

 become better acquainted with this genus, the species will be found to 

 have a very wide geographical range. 



7.-ALYPIA SIMILIS, (PI. 1, fig. 5, 5 .) N. s. 



3 . — Black. Head black. Eyes, prominently margined behind 

 and beneath with pale sulphur yellow. Palpi, black, roughly scaled, 

 projecting prominently beyond the front. Antennae, long, black, 

 gradually thickened towards the tips, sub-annulate with white on the 

 basal portion. Thorax, black; two minute pale yellow spots on the 

 prothorax; patagia, pale sulphur yellow. Abdomen, black, with a 

 minute basal yellow dot above. Legs, black ; tibiae of middle and 

 anterior pairs, clothed with pale orange scales; tips of the joints of the 

 tarsi whitish. 



Wings, velvety black, with faint metallic blue reflections. Anterior 

 wings, with the costa swollen, and convex centrally, owing to the 

 enlargement of the interspace above the sub-costal nervure, the cen- 

 tral portion of the enlargement being nearly destitute of scales and sub- 

 diaphanous. i\t base, a large triangular sulphur yellow patch, much 

 produced towards the inner angle, and faintly divided into two unequal 

 portions by the median nervure; a minute yellow discal spot; and an 

 outer transverse, sulphur yellow, broadly-ovate band, neatly divided 

 by the black nervules into six spots. The posterior wings have a 

 moderate, pale sulphur yellow, triangular, basal patch, unequally 

 divided by the black median vein; and an outer, transverse, sulphur 

 yellow band, broad on the costa and tapering to a point inferiorly, 

 neatly divided by the black nervules into five unequal spots. Costal 

 margin, yellowish from the base to the outer band. Beneath, as 

 above, except that the costal streak on the secondaries is more strongly 

 marked. Fringes on all the wings, long, black, and silky. 



Four males correspond exactly with the above description, the only 

 female I possess (from which the figure is drawn,) differs merely in 



