318 1IK. T. J. BOLD ON COLEOPTEROUS INSECTS 



C. Sahlbergi. Very abundant in ponds. 



C. Linnet. Rare. 



C. semistriata. Ponds, &c. ; common. 



C. nigrolineata. Yery common. 



C. distincta. By no means rare. 



C. prceusta. Not rare at Heaton and Gosforth in August and 

 September. 



C. limitata. Rare. 



Cymatia Bonsdorffii. Gosforth lake ; some wb at rare. 



XXIX. — List of Coleopterous Insects added to the Fauna of North- 

 umberland and Durham during the Years 1865-6. By Thomas 

 John Bold. 



1. Bembidium \_Tachys~\ quadnsignatum, Dufts., Nat. Hist. 



Trans., I, 183. E. C. Rye, Ent. Monthly Mag., II, 185. 



Although the locality has been since repeatedly searched, no 

 further specimens of this interesting creature have been found. 



2. Colymoetes \_Ilyous~\ sex-dentatus, Schiodte, G. R. Crotch, 



Zool. 8999. E. C. Rye, Entomological Annual, 1865, 47. 



A series, taken at Boldon Flats, are referred to this species by 

 Mr. Crotch. The male has an obscure tooth on the intermediate 

 claws. 



3. Mydroporus quinquelineatus, Zetterstedt, E. C. Rye, 1. c. 



1863, 69. 



Of this rare species, which appears to be a boreal one, I have 

 a fine series taken in Prestwick Carr, in September. 



Zetterstedt found it copiously in the north of Lapland, in the 

 month of June. 



