Notes on a parasitic moth. 
by 
U. Nawa. 
First assistant in Nawa's entomological laboratory. 
Although several species of parasitic insects belonging to the 
Hymenoptera and Diptera, ete. All well known, it was not until I 
made the observations recored below that I was aware of such 
insects belonging to the Repidoptera. 
In October 1892 I captured a small moth on Mount. Kinkwa 
(in the vicinity of Gifu), with which I was absolutely unfamiliar 
at the time. In the beginning of August 1898, mr. Y. Nawa 
found on Mount. Yord, some curious larvae covered with white 
substance, and living on the outside of the abdomen of Pomponia 
japonensis, these he brought back to our laboratory and bade me 
observe them closely, Where upon I put them into the breeding 
cage and observed them every day. After a few days they spun 
small cocoons, from which the moths which issued were found to be 
same as those of the species mentioned above, Afterwards the 
same kind of moths*were collected in several prefectures of Japan; 
viz, Shiga, Toyama, Tottori, etc. According to my observations 
the cicadas on which the laryae most lived were the Pomponia 
japonensis, in less degree the P. maculaticollis; and least of all the 
Graptopsaltria calorata. 
The larva appears at first sight a maggot, because its legs are 
very short and the prolegs can barely be traced. The head is very 
small and in colour pale yellow; the other parts of the body are 
pale redish-brown; but when full grown the body is covered with 
fine white hairs, which appear like a mass of cotton wool, which 
protect from rain. The larvae live on the ventral thorax and 
