634 PROCEEDINGS OF THE THIED ENTOMOLOGICAL MEETING 



year 1911, some of the mulberry-tree fields in Taihoku-Clio were 

 affected by a great emergence and some serici-culturists suffered from 

 scarcity of leaves. 



Only one control-measure, mineral oil spraying, is recommended 

 by us. 



No. 13. — Tettigonia ferruginea var. apicalis, Walk. (OJio- 

 Tsu mag uroyokoba i . ) 

 This widely-distributed Jassid is commonly found throughout the 

 Island of Formosa, but the emergence is not abundant annually, and 

 I have never seen this in injurious numbers. It is generally known by 

 agriculturists and entomologists that this species 'attacks sugar-cane, 

 mulberry-tree, orange-tree, Paulownia sp,, and the tea-plant. 



^ ^ No. 14. — Geisha distindissima, Walk. [Ao-Hagoromo.) 



This Fulgorid also very commonly occurs throughout Taiwan Island, 

 but is not very abundant. It attacks orange, tea, etc., but the injuries 

 are, however, very slight, so that the natives almost always take no care 

 of this pest. 



No. 15. — Brachytrypes porfentosus, Licht. {Taiivan-0-Korogi.) 

 This large brown cricket is our most familiar burrowing species, 

 found commonly through the Island, and its occurrence is rather abun- 

 dant, especially in sea shore districts or on sandy high-land. 



In September the female cricket burrows into the soil, about one 

 or two feet below, until she reaches the hard soil, where she deposits her 

 eggs (about 40) which usually stand in a bunch at intervals of about 

 9 mm. and never in contact with one another. In one burrow only a 

 single egg-mass is almost always found, but two or three masses may be 

 deposited by a single female. The eggs hatch in about a month after 

 deposition. Newly-hatched larvae usually live together in a burrow, 

 but soon after they separate and come out of the burrow. Thus each 

 larva burrows under the soil-surface about three to six inches, and Uves 

 in its hole. At night, it comes to the surface and seeks its food, the 

 leaves and young shoots of plants, which it eats or draws into its burrow. 

 During its wandering for food, here and there, the young cricket often 

 loses its burrow and is forced to begin to form a new burrow for its dwel- 

 ling place. This reburrowing is sometimes probably repeated again. 

 The burrow of this species is not straight but generally curved twice or 

 more, and it is rather elliptical, about six to twelve inches in the long- 

 diameter or about from three to six inches in the short-diameter. The 



