THE CANADIAN ENTOMOLOGIST. 431 



Rusticus acvioji, Boisd. — Abundant in spring and fall. The larva 

 feeds on Hosackia. This species is much given to variation, and I think 

 good series from various localities would show that a number of so-called 

 species are but forms of this. 



Cyaniris ladon, Cramer, var. piasiis, Boisd. — This is one of the 

 earliest and commonest butterflies in California, where it replaces the 

 Atlantic ladoJi (psetidargiolus, Boisd. and Lee). The caterpillar feeds on 

 the flowers of the California Buckeye (^sculus calif oniicus). Feb. to July. 



Everes aviytitula, Boisd. — Common in May and June. Frequents 

 the flowers of yEscidus^ which is most probably the food-plant. 



Brephidium exilis, Boisd. — Abundant, except in the hills, from May 

 to June. The food-plant is Atrip/ex. 



Hesperiid.e. 



AfitJiomaster agricola, Boisd. — Rather common on flowers in August 

 and September. 



Aiithomasttr pratiiicola, Boisd. (?) — Several specimena taken at Black 

 Mountain in September and October appear to belong to this species. 



Hylephila campesirts, Boisd. — Not rare in early fall. 



Polites sabuleti, Boisd. — Flies from May to September. 



Phycanassa melane, Edw. — May to October. Not common. 



Thanaos propertius, Lint. — Flies in early April and May quite 

 abundantly. 



Thanaos ditus, Edw. — Common. 1 am in doubt as to the correct 

 identification of this and the preceding. 



Hesperia ericetorum, Boisd.— Rare. I have seen but a single speci- 

 men taken in this county. 



Hesperia iesse/lata, Scudder. — Common everywhere. The fact that 

 the life-history of tessellata has been fully described by French in his 

 Butterflies of the Eastern United States (Supp., p. 404), appears to be 

 overlooked. In this locality the larva feeds on Alalva boreaiis, and I 

 have found eggs, pupse and larvae in all stages. Much irregularity is 

 exhibited. On October 14th I observed a female ovipositing, and col- 

 lected a number of eggs. Two eggs hatched October i8th, and on the 

 20th two more. The remaining two did not hatch until the middle of 

 December. The larva emerges from the egg by eating out a round 

 circular hole at the apex. The pupa is formed in the leaves. 



Hesperia ccespitalis, Boisd. — Occasional in the mountains, from April 

 to July. 



