Of this species I possess only one specimen; but this differs so much from the other California Lycænæ, that I consider myself justified in giving a diagnosis of it, although, as a rule, descriptions of Lepidoptera belonging to complicated and difficult groups should not be given without ample material on which to base them.
This specimen is from Mono Lake, and was collected by the Geological Survey.
15. L. Battoides.
Alæ ♂ ris supra azureæ, late nigro marginatæ tessellato limbatæ, ♀ næ fuscæ, posticæ lunulis nonnullis fulvis submarginalibus instructæ, omnium limbus tessellatus.
Alæ utriusque sexus subtus albidæ, punctis radicalibus duobus, in anticis in fasciam transversam valde refractam nigram confluentibus, linea discoidali, serie punctorum ordinariorum quadrangularium nigrorum, duplici serie submarginali, necnon margine nigro instructæ. Alæ posticæ tribus punctis radicalibus nigris et ad seriem punctorum submarginalium internam fascia fulva ornatæ, quæ nec seriem punctorum externam neque apicem anteriorem attingit.
This species was collected at an elevation of eleven thousand feet, on the head-waters of the San Joaquin River, by the Geological Survey. It represents the European L. Battus.
16. L. Enoptes, Boisd.
Hills near the Mission Dolores, and in the San Bruno Hills. This species is rather rare. It represents the European L. Aegon.
17. L. Antægon, Boisd.
The most common species near San Francisco, and found nearly everywhere through Central California. There are several generations succeeding each other through the year. A specimen I received from the head-waters of the San Joaquin River differs somewhat from this; but as I have only one of this variety, I will not venture to express a decided opinion in regard to it. It is, perhaps, an Alpine variety, and corresponding with a similar one of L. Sæpiolus, of which I received several specimens forming a series of transitions from the common type.