210 



Mr. Fullaway reported finding 20 per cent of the eggs of 

 Caryohorus and Bruchus ■prosopis on algeroba pods parasitized 

 by a Trichogrammid (IJscana semifumipennis Girault).* This 

 parasite is thought to have been introduced at the time he was re- 

 ceiving weevil parasites from Texas a few years ago. 



A New Endemic Fern Weevil of the Genus Heteramphus. 



BY OTTO II. SWEZEY. 



On January 14th, 1912, while following up the ridge on the 

 west side of Palolo Crater on the trail leading to the summit of 

 Mt. Olympus, fronds of ferns of the genus Elaphoglossum were 

 observed to be mined by some insect. Examination of several 

 mines resulted in the finding of one adult beetle, a pupa, and 

 several larvae. The fronds of the ferns of this genus being 

 broad and entire are quite suitable for the work of leaf -miners. 

 Three species of Elaphoglossum were found to have the fronds 

 mined. Larvae of the miner were first found in E. micraden- 

 ium, but later in E. gorgoneum, and reticulatum also. The adult 

 beetle found was in its own mine, where it had transformed to 

 the adult stage and had not yet emerged, furnishing on the spot, 

 proof of what insect was responsible for the mines. 



On January 21st the same locality was again visited, and 

 more of this miner collected in all stages. It was found that 

 this weevil existed wherever these particular ferns were found 

 all the way up Mt. Olympus, and then down the ridge between 

 Palolo and Manoa Valleys, as evidenced by the mines in the 

 fern fronds. Many of these mines showed the exit holes of some 

 parasite. Searching for the parasite, finally a parasite pupa 

 was found in one mine and in another a weevil larva was found 

 to have a tiny parasite larva feeding on it. Attempts to rear 

 these to maturity failed, but from mines in fern fronds col- 

 lected, five parasites emerged, one each on the following dates : 

 February 2, 5, 8, 12, 13. These were Ompliale metallicus, a 

 small Chalcid which parasitizes many Lepidopterous leaf- 

 miners in the Hawaiian Islands. 



Several adult weevils also emerged from mines in these 

 fronds somewhat later. On comparison these were found to 

 differ from the previously known species, some of which are 

 known to inhabit the trunks of tree-ferns, and Dr. Perkins has 



*Trans. Am. Ent. Soc. XXXVII, No. 1, p. 23, 1911. 

 Proc. Haw. Ent. Soc, II, No. 5, July, 1913. 



