NORTHUMBERLAND AND DURHAM. 41 



2. S. affinis, Er., 1. c. 42. 



3. S. orbiculatus, Payk., 1. c. 43. 

 Much rarer than the preceding. 



LITHOCHARIS, Lac. 



1. L. maritime/,, Aube., Ent. Mon. Mag. II., 1869. 

 Rare. Sea coast near South Shields. 



2. L.fuscula, Mann., Nat. Hist. Trans. I., 132. 

 With the preceding, and quite as rare. 



3. L. ochracea, Grav., Trans. CI. II., 41. 



4. L. melanocephala, Fab., 1. c. III., 89. 

 Banks of streams. Not common. 



5. L. obsoleta, Nordm., 1. c. VI., 229. 



Very rare. Near South Shields, in May. 



STENID^E. 

 DIANOUS, Leach. 

 1. I). ccerulescens, Gyll., 1. c. II., 43. 

 Rare. Ouseburn Dene. Wallington, Dr. Power. Near 

 Wooler, Mr. J. Hardy. 



STENUS, Lat* 



1. S. biguttatus, Linn., 1. c. 



2. 8. guttula, Mull., 1. c. 44. 



3. S. bimaculatus, Gyll., 1. c. 



4. S. Juno, Fab., 1. c. 



5. S. bupfhalmus. Grav., 1. c. 



6. S. atratulus, Er., 1. c. 



Local. Apparently more plentiful on the sea coast than else- 

 where. 



7. S. melanopus, Marsh., 1. c. 45. 

 Rather uncommon. 



* The student may consult with advantage a most valuable descriptive paper on the 

 " British Species of Stenus," by E. C. Rye, in the Entomologists' Monthly Magazine, Vol. 

 I., p. 6 et seq. 



