IQO - 



A. ambiguus Say. — Lake Superior Region, Labrador. 

 A. longulus LeY. — Michigan. 



SCUTOPTERUS £sc/l. 



S. angustus Ler. — Canada, Lake Superior (also Kan.). 

 S. Hornii Cr. — Canada. 



Rh.\ntus £sc-/i. 



R. flavogriseus Cr. — Found near N. V. City, Michigan (Schwarz). 

 R. binotatus //an: — N. E. Amer. (also the whole U. S.). 

 R. calidus F(il>>: — Rare near N. Y. City, N. J. (also Ga,). 

 R. bistriatus jSt-^-^.r/, — N, V., N. L, Mass., HI., Lake Superior, northward 

 and westward (also Europe and -Siberia I. 



A. sinuatus Lee — Peekskill, N. V., lare (ShermanI, Micliigan (Schwarz). 



Col v.M BETES Clair. 



C. sculptus Ilarr. — N. E. Amer. (also Id., Mont., Or., Cal.j. 



C. grcenlandicus Aiibe. — Greenland. 



HvDATicus Leach. 



H. stagnalis /^'»/'/-. — Found near N. Y. City; Pa., X. Hampsh. (Slosson), 

 Mich., Wise. (alsoN. Europe and N. Siberia). 



H. piceus Lee. — Taken near N. Y. City, X. ]., I'a.. HI., Lake Superior and 

 Canada). 



H. bimarginatus Say. — Taken near X. Y. City, X. L. Pa-, Ohio (also 

 Ga., Fla.). 



DvTiscus Linn. 



D. sublimbatus Lee. — Ohio (I)iiry), Lake Superior, Canada. 



D. fasciventris Say. — X. Y. City and vicinity, X. J., I'a., Xew Hanipshiie 

 (Slosson), Lake Superior, Ohio, Canada. 



D. hybridus Anbe. — X. Y. City and vicinity, X. J., Fa., III., Ohio (also Kan ). 



D. verticalis Say. — X. Y. City and vicinity, X. J., X. Hampsh. (Slosson). 

 Pa., Lake Superior, Can. 



D. Harrisii L\by. — X. L, Pa., Lake Superior, X. Hampsh. (Slosson), Can. 

 (also Kan. , X'anc). 



D. marginicoliis /.(•<-.— Ohio (Dury), 111. 



D. dauricus Gebl. — .Maine to Alaska, Michigan (Schwarz), Quebec, Can. 

 (Couper). 



Acinus L^cach. 



A. semisulcatus Aiibe. — X. E. Amer. 



A. fraternus JIarr. — N. \i. Amer. Common. 



A. mediatus Say. — X. E. Amer. 



THERMONECTES Escll. 



T. ornaticollis Aitbe.S.X . City and vicinity, Pa., 111. (also Te.\., X, Me.\. 

 and Kan.). 



T. basilaris //<(/•;•. — X. E. .\nier. (also (ia., Te.\. ). 



