BARE HEMIPTERA-HETEROPTERA IN NORTH-EASTERN COUNTIES 3 



in the area. I am told that, except for the absence of buckthorn 

 scrub, it closely approximates Wicken Fen in general appearance, 

 and I can say from personal observation on ecological survey 

 work that its vegetation very nearl}' coincides with that recorded 

 for Wicken by Prof. Yapp,* except for the quite unexpected Alpine 

 or Sub- Alpine element typified by the Globe Flower {Trollius 

 europceus) amongst plants. This Alpine factor is not confined to 

 plants alone, for such insects as Coremia munitata are not 

 infrequent, although the marsh is only 10 ft. above sea-level. 



In May and June this year I found minute larva;} of Acompus 

 rujipes feeding in myriads ou the flowers of the Great Valerian 

 {Valeriana sainbucifolia) and the Small Valerian (F. dioica). 

 Later, in September, in sampling the Carices for Livia crefel- 

 densis, great numbers of adult forms of both sexes of A. rujipes 

 were sweot up, accompanied by one solitary Liyw. On the same 

 occasion I was gratified to add a long-hoped-for spider to our 

 already extensive lists, to wit, Pirata latitaus. On account of 

 the manifest similarity of the ground to Wicken the occurrence 

 of this Arachnid had long been predicted. 



Phytocoris pini, Kbm. — Not on record for England, but 

 beaten from Scotch Fir {Pinus sylvestris) in an extensive pine- 

 wood lying above Lanchester in Durham, which incidentally 

 yielded several new Cecidomyids to the British Fauna. 



Plaqiognathus alhipennis, Fall. — Again a species not recorded 

 from the North previously. This was beaten in goodly numbers 

 from the Sea-wormwood (Artemisia maritima) fringing the 

 northern edge of the saltmarsh at Greatham. When it was 

 first secured four or five years ago, the Psyllid Aphalara jnlosa 

 accompanied it, but during the last two years the Psyllid has 

 not turned up. The rarer Artemisia-feeding Coleophorce were 

 beaten, not uncommonly, on all occasions. It is to be noted 

 that Saunders does not record Artemisia maritima as a food- 

 plant, although his localities in several cases are very suspicious. 

 He only mentions A. abrotanum and A. absinthium. 



Salda pilosa, Fall. — This Saldid is very plentiful indeed 

 amongst the Salicornia europcea on the south side of Greatham 

 Marsh. It frequents soft muddy spots just in the process of 

 being colonised by such halophytes as Salicornia and Spergularia. 

 With it I captured three species of Thrombid mites, two new to 

 science and one only on record for Clare Island previously. 

 These will be dealt with by the Kev. J. E. Hull later. These 

 patches of newly-colonised ground also yielded a new species of 

 Psocid — a Pterodela resembling P. pcdicularia, but blacker and 

 with stouter legs and different genitalia. I have named it 

 Pterodela halensis, and hope to describe it shortly. 



It is remarkable that the only Salda on the north side of 

 Greatham Fleet is the ubiquitous Salda saltatoria. 



* ' The New Phytologist,' vol. vii, nos. 2 and 3, February and Mai'ch, 1908. 



