664 M - w - R - de V. GRAHAM 



Mesopolobus agropyricola von Rosen 



(Text-fig. 555) 



Mesopolobus agropyricola von Rosen, i960 : 22-25, $ $. 



Type material. Holotype $ in Universitetets Zoologiska Institutionen, Lund ; 

 paratypes in Statens Vaxtskyddsanstalt, Stockholm. Described from material 

 reared in Sweden (Uppland, Solna) in 1958-1959, from Agropyron, and swept from 

 the same plant. 



Britain [new record] : Berkshire, Wytham, 2 <$, 7.viii.i956 (G. R. Gradwell) ; 

 Sweden. 



Biology. Reared from stems of Agropyron repens L. in Sweden (von Rosen, 

 i960). Imagines July-August. 



Mesopolobus phragmitis (Erdos) 



Eutelus phragmitis Erdos, 1957 : 63, fig. 5, $. 



Mesopolobus phragmitis (Erdos) v. Rosen, 1960a : 34-35, $. 



Mesopolobus phragmitis (Erdos) ; v. Rosen, 1962 : 146-147, q" $. 



Type material. Type $ and paratype $, Hungary, Gardony, 14. v. 1955, from 

 Thomasiella arundinis Schin. in lateral shoots of Phragmites communis Trin. (Erdos), 

 in coll. Erdos. 



Britain, Ireland, Denmark, Sweden, Hungary, Moldavian S.S.R. ; evidently 

 widely distributed, but very local (probably only in old reed-beds). New record : 

 England, Dorsetshire, Lodmoor, near Weymouth, a few $$, 13. ix. 1962, captured 

 in a reed-bed (Graham). 



Biology. Parasitic on Thomasiella arundinis (Schin.) (Dipt., Cecidomyiidae), 

 see Erdos (1957). Imagines May, Aug.-Sept. 



Mesopolobus mesostenus sp. n. 



(Text-fig. 538) 



$. Head and thorax green, with some brassy reflections which may invade the whole of the 

 dorsal surface ; gaster brassy, varying towards greenish in places, or towards coppery. 



Antennae testaceous ; pedicellus more or less infuscate dorsally ; anelli and proximal 

 segments of funicle slightly brownish, the other funicular segments sometimes a little darkened 

 dorsally. Coxae concolorous with thorax ; legs otherwise yellowish with the tips of the tarsi 

 brownish, the femora and tibiae sometimes testaceous medially. Tegulae yellowish, sometimes 

 a little darkened posteriorly. Wings subhyaline ; venation yellowish to testaceous. Length 

 2-5 to 2-9 mm. 



Head about 1-25 times as broad as the mesoscutum ; in dorsal view approximately twice as 

 broad as long ; temples hardly more than one quarter as long as eyes, converging rather strongly, 

 nearly straight ; POL i-8 to 2 times OOL. Head in front view subtrapeziform with the oral 

 edge truncate, genae slightly buccate. Eyes separated by 1-2 to 1-25 times their length. 

 Malar space half, or very slightly more than half, the length of an eye. Breadth of oral fossa 

 about 1 -8 times the malar space. Clypeus reticulate, or with only traces of striation, its anterior 



