470 



rearing- one moth from them, which was of this white form, he 

 was convinced that this was a different species, especially as the 

 larvae had different markings from those of accepta, there 

 being more of the blackish markings on the thoracic segments. 

 Unfortunately no description was made of the larvae, nor any 

 of them preserved. More of these will be looked for on the 

 next visit to the place. 



This makes the fifth native species of Omiodes whose larvae 

 feed on grass, the others being: accepta (Butl. ), continuatalis 

 (Wall.), demaratalis (Wall), and localis (Butl). Of these, 

 accepta is the most abundant, and also feeds on sugar cane, 

 sometimes doing considerable injury. 



Notes on Proterhinus abnormis, a Leaf-Miner in Leaves of 

 Brcussaisia arguta (Col). 



BY O. H. SWEZEY. 



The larvae of Proterhinus abnormis Perkins mine the leaves 

 of Broiissaisia arguta very abundantly on Alt. Kaala, the high- 

 est mountain on Oahu. On a trij^ there ]\Iay 18, 1920, I col- 

 lected a number of the beetles. They are found between the 

 unexpanded leaves at the tips of growing branches of the tree. 

 A few were found on the under side of mature leaves, where 

 they oviposit. In doing this a small round excavation is made 

 in the under side of the leaf, or in a vein, the egg deposited 

 in the hole and covered with a little substance apparently 

 obtained by chewing up the hairs and surface of the leaf in a 

 circle about the place where the egg has been deposited. This 

 circle is quite noticeable on the under surface of the leaf (Fig. 

 la). Sometimes it is a ring 3-5 mm. in diameter, but fre- 

 quently the whole surface of the circle has been chewed over 

 and has a pale brownish appearance. There may be from one 

 to ten of these per leaf. 



The egg is whitish and very soft, about .4 mm. in diameter. 

 The irregular mines are well shown in the figure (Fig. lb). 

 The larva is yellowish when full grown and ready to pupate. 



Proc. Haw. Ent. Soc, IV, No. 3, September, 1921. 



