THE INSECTS OF NORTHUMBERLAND AND DURHAM. 281 



passes; it happens, as might be anticipated, that several Coleoj)- 

 tera, belonging to the east coast of England, fail to surmount 

 the barriers thus reared to impede their progress. The most 

 important interruption, whatever be the cause, takes place 

 before even the nearest of these limits is arrived at, in the tract 

 a little to the north of Newcastle. The following species either 

 keep to the south of the Tyne, or do little more than cross it, or, 

 at least, have not been detected farther to the north than the 

 vicinity of Morpeth, viz. : — A nchomenus oblongus, Agonum quad- 

 ripunctatu7n, Plati/derus rujicollis, Argutor Anthracinus, Pteros- 

 tichus imriim'piinctatiiSy Trechus placidus, Licinus depressus, 

 Leistus spiniharhis, Bemhidiwii rufescens, B. tricolor, B. ohllquum, 

 B. gilvipes, Halijylus ciner'eus, Hydroporns dorsalis, Hypjhidrus 

 ovatus, JPcelobius Hermanni, Golyiiihetes dispar, C. guttiger, 

 Gyrinus Urinator, Agathidium Globus, Scaphidium quadrimacu- 

 latum^ Scaphisoma Agaricinum, Fhosphuga polita, Thymalus 

 Umbatus, Nitidula pygriiaea, Rliyzophagus coeruleus, Gerylon His- 

 teroides, Latridius cmgusticollis, Gorticaria liiiearis, Philonthus 

 sp)lendidulus, Xantlwlinus fulgidus, X. tricolor, Phlceocharis suh- 

 tilissima, Phloeonomus injlatus, Anthobiicm triviale, Boletobius 

 Jormosus, B. castaneus, Homalota imniei^sa, Phloeopora corticalis, 

 Tachyusa ttvida, Galodera rubicunda, Falagria sulcata, F. 

 thoracica, F. obscura, Saprinus virescens, Aphodius subteri^aneus 

 A. f ceteris, Mhisotrogus solstitialis, Fubt'ia pcdustris, Telepliorus 

 clypeatus,Malac1iius bipustulatus, Dasytes viridis, Tillus elongatus, 

 Pyrocliroa rubens, Ischnomerct lurida, PlcUydema cenea, Anthri- 

 bus cdbinus, Rhynchites conicus, R. Pauxilhis, Apion affine, A. 

 rufirostre, A, pallipes, A. Sorbi, A. afer, Gneorhinus exaratus, 

 Balaninus villosus, Tachyerges Saliceti, Geutorhynchus pyrrhor- 

 hynchus,G. melanarlus, G. Asperifoliarum, G.marginatus, Gleopus 

 pulchellus, Trypodendron domesticum, Gcdlidium Alni, Glytus 

 arcuatus, Tetrops prceusta, 8aperda ferrea, Toxotus meridianus, 

 Gassida sanguinolenta, Galeruca Viburni, G. Xanthomcdena, 

 Galomicrus circumfusus, Haltica fiexuosa, H. 4i-guttcUa, Longi- 

 tarsus pusillus, Fsylliodes afinis, Gryptocephalus sericeus, G. 

 minutus, and Triplax cenea. The following proceed further 

 northwards, but are not known to cross the Tweed, viz. : — 



