ON TWO NEW SPECIES OF PHLŒOTHRIPi?. 3 



and second joints is in an oblique direction, along which a row of short spines can be 

 distinctly seen. The second juucture is not so much in an oblique direction as the 

 first, but along it also a row of short spines can be traced ; so that the first segment is 

 in the form of a triangle, the second trapezium, and the third subquadrate. 



Phlœothrips japonica, sp. nov. 



Very closely resembles the former species, but differs from it in the following 

 peculiarities : — 



1. Length, 1.4 — 1.8 mm. 



2. Head not narrower towards the front. 



3. The 2nd joint of antennœ inverted conical, the 3rd long ovate, the 4rth 



broad ovate, the apical joint bluntly ends with many hairs, the 6th, 7th 

 and 8th much darker. 



4. The two apical joints of the body not reddish brown. 



5. Tip of the primaries of the male does not reach the 10th segment. 



6. The form and the rudimentary veins of the primaries differ. — The antecostal 



area being much narrower than that of oryza ; the radical vein broader, 

 shorter, and straight ; the median vein distinct, much longer than the 

 costal vein ; only one or two hairs may be seen at the base ; the basal ap- 

 pendix broader and a little shorter than that of oryza, with one small 

 bristle at the apex. The form of the basal junction part is not excavated 

 so much as that of oryzœ. Fringes 100. 



7. Mouth not conical, a little narrowed at the middle. 



8. The tubular sheath of the pygidium originates just from the base of the 10th 



segment. 



9. Bristles of the lateral abdomen erect and a little shorter, while that of 



the ventral side can scarcely be seen. 



Habitat — Niigata, Fukushima, Iwate, Tokyo and many other places. 



This species may possibly be identical with the European species P. /rumenta- 

 ria, Bel. which is known to attack wheat and rye, but owing to laek of gonr] de- 

 scription it can not be well determined. 



The life history of these insects is not wellknown, but according to some de- 

 scription it seems that they are two brooded in a year ; the first brood appears in the 

 latter part of June, attacking the young leaves of the rice-plants, just before being 

 planted out, they roll the leaves longitudinally, and greedily suck the juice. A great 



