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the leaf. I have found this species wherever the host trees were 

 found in the Koolau Mts., from Xiu to AVahiawa, Oahu. 



Gracilaria hauicola Sw. — This species very abundantly 

 mines the leaves of the "hau" tree, Fartltium tiUaceum, in the 

 mountains, and the lowlands as well, of all the Islands. There 

 are often many mines per leaf. The larvae emerge to pupate in 

 white oval cocoons on the surface of leaves and other objects. 



Gracilaria hihisceJla Sw. — I found this species quite numer- 

 ous, mining the leaves of the native Hibiscus on Mt. Tantalus, 

 and occasionally on Hibiscus hedges in Honolulu. There are 

 sometimes several mines per leaf. The mine is at first slender, 

 but eventually widens and forms a blotch. The larva emerges 

 to pupate in a white oval cocoon on the surface of the leaf. 



I have found a Lepidopterous larva mining very abundantly 

 the fronds of Pteris irregularis on Mt. Tantalus, but have failed 

 to rear any adults. I have also occasionally found a Lepidop- 

 terous larva mining fronds of PolypodiiDn spectrum, in various 

 parts of the mountains of Oahu, but have not yet been able to 

 rear an adult, so I do not know whether they belong to the above 

 genera or not. 



Opostega maculafa Walsm.- — The larvae produce serpentine 

 mines in one or more species of Pelea in the mountains of Oahu, 

 and perhaps all of the Islands. The larva is very slender and 

 elongate, and quite diiferent from the other Lepidopterous leaf- 

 mining larvae. The mines were known for a ling time, and sev- 

 eral entomologists had tried rearing them at various times ; but 

 witliout success. I have finally had the good fortune to rear a 

 pair of moths, and thus the mystery of these mines is settled. 

 The larva emerges from the mine for pupation. In my breed- 

 ing jar it spun a small brownish lenticular cocoon in moss. 



Opostega dives Walsm. — On certain species of Pelea, a 

 closely-wound spiral mine is often very abundant. The larvae in 

 these are quite similar to the preceding, and I have no doubt but 

 what this is the other described species of Opostega, though no 

 one has yet reared it. 



C re inastohomhijcia lantanella Busck. — This is the introduced 

 Lantana leaf-miner. It is very abundant now, wherever Lan- 

 tana is found. The mine is a sort of inflated blotch, usually 

 several per leaf. The cocoon is slender spindle-shaped and sus- 

 pended in the mine by a thread at each end. 



Bedellia minor Busck, and B. somnidentcUa Z. — The larvae 

 of these two specie? are said to mine the leaves of sweet potato 

 and various other vines of the genus Ipomoea.. I consider that 



