a B. WlMJA^IS 



227 



spines on tho costa, 17-20 on tlio fore vein, and l.'J Ki on tlie liind vein. Hind wings 

 clear, the single vein indistinct but distinguishable to near the tip of the wing. 



Abdomen. The ventral pleurites pectinate posteriorly. A very short pro- 

 jection on each side of the eighth abdominal segment (corresponding in position to 

 the much larger ones in the male). A row of short pointed tooth-like projections on 

 the hind margin of the eighth tergite. The tenth segment longer than the ninth 

 and split dorsally for about three-quarters of its length from behind. 



Male (Fig. 2). 



About one-sixth smaller than the female. All the antennal segments, especially 

 the first two, much paler than in the female. On each side of the eighth segment is 

 a short process curving backwards and upwards and ending in a blunt point. The 



Fig. 2. Kakothrips rohustus. Male, a, outlines of two forms of clear areas on the 

 third to seventh abdominal sternites. 



transparent areas on the 3rd-7th sternites are elongate, but vary slightly in outline 

 as showTi in Fig. 2 a. Otherwise similar to the female. 



Uzel's type specimen is in the Bohemian Landes Museums, Prep. No. 13, but as 

 there is no doubt as to the identity of the species the above description has been made 

 from British specimens. 



Separation from Frankliniella intonsa. 



The only other closely allied species which occurs in peas and beans 

 and with which the pea thrips might be confused is Frankliniella 

 intonsa. This can, however, be distinguished by the absence of the 



Ann. Biol, i 16 



