226 



along the trail up Pniialuu Ridge, Oahu. It is a very unusual 

 habit for the larvae of this group of flies. They usually feed in 

 rotten wood, beneath dead bark, beneath leaf-sheaths of banana 

 and other plants, also at the roots of plants. I have found no 

 records of any as leaf-miners. Pupation of this species takes 

 place within the mine. I reared several specimens, but none in 

 good enough condition for description. When I next visit the 

 place I shall obtain more of them. 



FAMILY AGROMYZIDAE. 



Agromyza diminuta (Walk.) — This is a very common intro- 

 duced insect. The larvae mine the leaves of many plants and 

 weeds, as: beans, peas, radish, melons, Bid-ens, Nasturtium, 

 Sida. Datura. ludigofera. Solanum, Sonrhus, etc. They emerge 

 to pupate in the ground. 



Agromyza n. sp. — I reared one specimen from a mine in a 

 leaf of Lahordea memhranacea, on Mt. Olympus, Oahu. I found 

 quite a number of mined leaves. The mine is conspicuous, show- 

 ing by its deep black color. It is very large in comparison with 

 the insect producing it. The larva emerged and formed its pu- 

 parium on the surface of the leaf. 



Agromyza n. sp. — I reared several specimens from mines in 

 leaves of Cocculus ferrandianus, on the trail from Nuuanu val- 

 ley up to the back end of the Pacific Heights Ridge, Oahu. The 

 plants sometimes have nearly all of the leaves mined. The 

 larvae emerge and form their puparia on the surface of the leaf. 



Agromyza ( ?) n. sp. — I have found a miner in the fronds of 

 a fern Marattia douglassi. It is probably another species of 

 Agromyza, but I have not yet succeeded in rearing adults. 



No native species of the family Agromyzidae have as yet 

 been described. I consider these three last species as native, 

 since they occur on native plants in the mountains. 



COLEOPTERA. 



FA^riLY PROTERIIIXIDAE. 



Proierhiuus cxcrucians Perkins. — I have found this species 

 Very ab\mdantly mining the leaves of Broussaisia arguta. along 

 the Olympus— Konahuanui trail, Oahu. This is quite an ex- 

 ceptional habit for a Proterliinus, as those whose habits have 

 been known heretofore are mostly bark beetles, or feed in dead 

 wood, dead fern stems, etc. 



