404 CALIFORNIA ACADEMY OF SCIENCES. [Proc. 3D Ser. 



slightly shorter than third, seventh and eighth shorter than sixth, ninth shorter 

 than eighth,— all are provided with short hairs. Eyes, three pairs, large and 

 conspicuous, one pair on dorsal and one pair on ventral aspect pinkish, the 

 pair on the side smaller and transparent. Prothorax narrow and short, meso- 

 thorax largest and well developed, metathorax shorter than mesothorax. 

 Legs long and comparatively stout, with many hairs, the three pairs of legs 

 similar, except that the front ones are directed forward, and the tarsi are the 

 longest; the four posterior legs directed backward; coxa all stout and short; 

 trochanter short and somewhat triangular in shape, closely united with femur; 

 femur nearly three times as long as trochanter and stouter; tibia longer than 

 femur and trochanter combined, more slender, with several spines along the 

 inside and one long spine at the posterior end; tarsus less than one-half the 

 length of tibia, except in the first pair, tapering toward tip, where it is ter- 

 minated by a short movable claw with an enlarged base, and by four knobbed 

 hairs. Wing, length .45 mm., width .10 mm., rather thick, transparent, nar- 

 row, and reaching to second or third abdominal segment, covered with many 

 minute hairs, margins nearly straight. Balancers were not observed. Abdo- 

 men oval in shape and almost as wide as thorax, tapering toward extremity. 

 From the ninth segment is formed the penis, and its enlarged base is kept 

 slightly within the eighth segment. The penis is in the form of a long, slen- 

 der, tapering style, which enlarges a little at the tip. 



Habitat. — Lives under sheathing bases of leaves of bam- 

 boo. The female always found with the head down. 



This interesting insect was first discovered on bamboo, 

 in Tokyo, Japan, by Mr. Takahashi, and was described in 

 1896 by Professor Cockerell,^ of New Mexico, from dried 

 specimens of full grown females with newly hatched larvae. 

 It was first found in this country by the writer, on the 

 campus of Stanford University, February 19, 1899, this 

 being the first time the male had been seen. 



1 U. S. Dept. Agri., Divi. Ent., Technical, Ser. No. 4, 1896, p. 49. 



