70 CIRCULAR 16 8, U. S. DEPARTMENT OF AGRICULTURE 



confused, only in wing color, and the latter is found only in Sak- 

 halin. Matsumura (96) considers them to be identical. 



Luperodes (Alonolepta) suturalis ab. nigrooilineatus is a common 

 pest of soybean in northern Japan, the adults feeding upon the 

 foliage from June to August. One brood is produced each year, 

 but the early stages are as yet unknown, and possibly occur upon 

 other food plants. 



The pea weevil, Bruchus (Mylabris) pisorum (dorsalis Fab.) 

 (74-9), is a serious pest of field peas in the various islands of Japan 

 and occurs also in Taiwan and China. A single brood is produced 

 each year, and the winter is passed in the adult stage in the seed or 

 in sheltered places. The beetles become active about the time the 

 blossoms develop in the spring, and the eggs are laid singly upon 

 the developing pods. The larva pupates within the mature seed. 



The two scarabaeids most common on legumes in Japan are Ano- 

 ■mdla ritfocuprea and PopiUia japonica. The first feeds particu- 

 larly upon soybean and red bean. In Hokkaido, however, this 

 species does not normally attack beans. Matsumura (95) states that 

 the life history extends over three years, the adults appearing about 

 the middle of June. As regards PopiUia japonica. a report on this 

 species has recently been published (12) by the writer and others 

 in which full data are given regarding food plants, habits, etc. In 

 central Honshu a full generation is produced each year, whereas in 

 Hokkaido the greater part carry over to the second year. Of the 

 economic crops attacked, pole beans and grape occasionally are 

 slightly injured, but soybean very seldom. These attacks occur only 

 in case the more favored food plants are lacking. In cases of heavy 

 infestation of either of these species the hand collection of adults 

 is the most practical means of control. 



The coccinellid EpiJaclrna aftnis (169) is recorded as an impor- 

 tant pest of beans, as well as of eggplant, in Taiwan. 



The pentatomid Coptosoma punctissimum (95) attacks both soy- 

 bean and red bean, and extensive damage is frequently done by the 

 feeding of the nymphs during June and July. There is one brood 

 a year, the adults appearing in September and passing the winter 

 in that stage in rubbish. The eggs are laid during the early spring 

 and hatch in about one week. 



A cecidomyiid (Johnsono/nyia sp.). is recorded by Kuwayama 

 (76) as very injurious to soybean in Hokkaido. The larvae are 

 most noticeable late in August, at which time they bore into the 

 leaf petioles. A single generation occurs annually, the adults ap- 

 pearing in late July and August. 



Lioihrips glycinicola Okam.. in conjunction with several other 

 species of the order, is at times very injurious to soybean in north- 

 ern Japan and Chosen. The injury is particularly serious during 

 periods of hot and dry weather. 



INSECTS AFFECTING IRISH POTATO 



Of the pests of potato the most important are the three species of 

 Epilachna. which attack, in addition to potato, various other vege- 

 tables, melons, beans, etc. E. nipponica (105. lift) is found in Hok- 

 kaido, Honshu, and Chosen, and. in the colder sections particularly, 

 often causes complete defoliation. There is one generation a year 



