2 M. MÀTBUMURA. 



bristles also along the posterior margin of the 10th. Anterior femur much more 

 thickened than that of the rest and without teeth. Median femur a little thicker than 

 the posterior. Wings linear, transparent, yellowish brown at the base ; strongly 

 fringed with long fuscous hairs. The number of the fringes in the primaries 91; 

 nearly without vein. The autecostal area broad ; the rudiment of the radial vein nar- 

 row, long and a little waved ; median vein can be scarcely traced. Two long bristles 

 and a number of hair holes present below the radial vein near its ending. Five 

 or more short bristles can also be seen around the large bristles. Basal appendix 

 nearly conical, with one long bristle at the apex. The tip of the primaries of the 

 female reaches lo the 8th segment, while that of the male to the 10th. 



Secondaries traversed by a longitudinal broad vein ending about the middle. The 

 number of friDges 88. 



Habitat — Yamagata. 



I have not yet received this species from any other place except Yamagata, and 

 it seems to be quite local to that region. 



Entomologically it belongs to the Order Thysanoptera, Family Ihripidœ, Group 

 Tuberifera. The tubular ovipositor of the female is very clearly seen under a 

 microscope, when the specimens are embedded in Canada balsam, after having been in 

 turpentine. It just bfgins near the apex of the 9th segment. Abdomen is very flat, 

 but the lateral margin being upturned and incurved so as to form a semitube, it seems 

 to be cylindrical when seen in profile. It is really 10 segmented, but at first sight 

 appears to be only 9 segmented, this being so because segments 1 and 2 are as if soldered 

 together, when seen in vertical view. Prothorax has the form of a trapezium, mesotho- 

 rax is very short and fused together with metathorax. Scutellum is in the form of 

 a high equilateral triangle. Two ocelli can be distinctly seen between the eyes, but 

 the other one being on the apex of the head between the antennae can not be well 

 seen. It has a large conical unjoiuted beak reaching to the anterior coxœ. Maxillary 

 palpi is two jointed, the first being very small. Labium is small and on its end has a 

 two jointed labial palpi of a comparatively large size. Antenna? is eight jointed, 

 each joint has many sensory hairs and pits. Anterior tarsus is two jointed, the first 

 joint (which is not haired) has a conical projection in an oblique direction toward 

 the tip. The second joint (one or two haired) is smaller and very much constricted 

 at the juncture. The median and posterior tarsi are tri-jointed. 



Hitherto the tarsi of all thripid insects were known to be two-jointed, but accord- 

 ing to my observation this is obviously tri-jointed. The juncture between the first 



