76 CIRCULAR, 1G 8, U. S. DEPARTMENT OF AGRICULTURE 



with the rostrum. As with many other weevils an additional hole 

 is usually made immediately below this, which, however, does not 

 contain an egg. Oviposition extends over a period of about two 

 months. The egg, larval, and pupal stages average 6, 22, and 6 days, 

 respectively. The adults feed upon the young foliage to some ex- 

 tent following emergence, but they become dormant about June and 

 continue so until the following season. 



The chrysomelid Gdleruceila distincta (185) is a common pest 

 of strawberry in central Japan. Three or four generations are pro- 

 duced each year, and the winter is passed in the mature larval stage 

 among weeds bordering the gardens. The damage is due to the feed- 

 ing of both larvae and adults upon the foliage. 



MISCELLANEOUS TRUCK-CROP INSECTS 



Of the insects attacking hop vines in northern Japan three may 

 be mentioned as of some importance, these being Psylliodes puncti- 

 frons, Pyrausta nubilalis, and Vanessa io geisha. The well-known 

 hop aphid, Phorodon humili (77), occurs in this section, but its feed- 

 ing here is of minor importance as compared with the injury it 

 does to the crop in western North America. 



The weevil Scepticux insularis which is known primarily as a pest 

 of sugar beet in Chosen, has become seriously injurious to peanut 

 in Chiba Prefecture, Honshu (44)- J n(J l°ss to this crop in 1910 

 was estimated to be 17 per cent. In this section there is a single 

 generation each year, the adults appearing in April and May and 

 persisting until September. They feed upon the buds and fresh 

 shoots of the young plants. 



The hepialid moth Palpifer sexnotatios is, according to Maki (86), 

 a serious pest of taro in Taiwan, 50 per cent of the crop often being 

 damaged, Several broods are produced each year. Fumigation 

 with carbon disulphide is .suggested as a means of control. 



The acarid mite Rhizoglyphus echinopus attacks various vege- 

 tables as well as bulbs, cereals, orchids, and grape. The nymphs 

 bore into the tissue of bulbs, often causing decay, and into the roots 

 of grape in greenhouses. According to Yagi (203), 10 generations 

 are produced each year, the cycle during the summer being completed 

 in from 10 to 20 days. This species is a serious pest in many coun- 

 tries. In Australia it is recorded as attacking many kinds of stored 

 vegetables and fruits, and when the attack is upon growing roots 

 and seedlings it usually results in the death of the affected parts. 



Burdock (Arctium lappa) is grown generally in Japan as a vege- 

 fcable, and its insect enemies are therefore of some importance. 

 Those of most consequence are Podhma pedestris sapporc.nse, Macro- 

 siphwm gobonis, and Clearws supercUiosus. According to Murata 

 and [keda (111) the last-named species has a single generation each 

 year, the adults passing the winter in sheltered places and emerging 

 early in the spring. Oviposition occurs in May and June and the 

 larvae bore into the roots. The egg. Larval, and pupal stages cover 

 10. 50, and 9 days, respectively, and the adults go into hibernation 

 almost immediately following emergence. 



TEA INSECTS 



According to Shiraki (17 J) and Sonan (175), the most injurious 

 insects upon tea in Taiwan are Andraca bipunctata, Euproctis con- 



