122 



fjune, 



marginal band, tlie mesotergal bosses and the scutellum densely cliitinised 

 and covered witli small oval pits. Rostrum very short, S-segmented, reaching 

 the mid-coxae. Wings normal aphidine, all veins well-marked. Abdomen 

 with 6 bands of strong chitin, interrupted into a broad central and a narrow 

 marginal area, the chitinised areas covered with small oval pits. Cornicles 

 mere pores, surrounded by a densely chitinised area. Cauda knobbed ; anal 

 plate bilobed ; gonapophyses 2. Abdomen with scarcely any hairs. Legs long, 

 robust; tibiae moderately clothed witli hair. Hind leg: length of femur 

 "56 mm., tibiae -84 mm., tarsus -18 mm. 

 Total length 2-64 mm. 



On rushes near Belfast {Haliday) ; on Aira caespitosa, Monymusk, 

 Aberdeenshire, August 1920 {F. Laing). 



\ m^MlMMW^i 



Fig. 2. — Tliripsaplns cyperi. Alate $ . A. Bod}'. B. 3rd seg-ment of antenna. 

 C. Cauda, anal lobes, and .gonapophyses. D. Frontal tubercle. SaltusapJds 

 insessa. Alate 5 . E. Wings. F. 3rd segment of antenna. 



I have found only the apterous viviparous females. The colour- 

 description has been taken from fresh material ; there is a difference 

 between this and Walker's original description, as he makes no mention 

 of any black markings, but a careful comparison with the type leaves no 

 doubt that my specimens belong to the same species. In life it is 

 covered with long, white filaments, readily soluble in alcohol, and at first 

 sight bears a strong resemblance to a Coecid ; in fact it was taken for 

 that at first. It readily falls to the ground when the leaf upon which it 

 is feeding is touched. All my specimens were taken on Aira caespitosa, 

 growing in a marsh. 



It is possible that Myzocallis cyperis Macch. (Soc. Ent. Ital. 

 Bull. 15, 1883, p. 259) also belongs to this genus, though it may equally 

 well belong to Saltusaphis, Init in his description Maechiati makes no 



