260 Dytiscidae 



Orient, Jl (NYS). Usually in woodland pools, and has been taken in 

 various localities in very moist and damp mossy places in the woods 

 where there is usually very little water, this species being a crawler 

 rather than a swimmer (Sherm). 



COPELATUS Erichson 



2605 C. glyphicus Say. Syracuse, Ap (H) ; Cazenovia Cr., E. Aurora, Sep 

 (Dnd) ; Waterville, Je (Not) ; Westfield, May (Not) ; Ithaca, Jl 24 

 (ShermCU); McLean, Jl (Dt) ; Karner, Mar (NYS); Esopus, Sep 

 (Sherm) ; West Pt. (Robn) ; Peekskill (Sherm) ; SI, Ap-May, Aug 

 (L&D) ; LI: E. New York, Je (Ds). Under stones, logs, etc., on 

 muddy shores of river at Peekskill and Esopus, between tide lines 

 (Sherm). 



COPTOTOMUS Say 



2610 C. interrogatus Fab. Keene Val., Jl (NYS) ; Cranberry L., May 15 (H) ; 

 Syracuse, Ap (H) ; Olcott, Jl (Dt) ; Batavia, Jl (Kngt) ; Buffalo 

 (Z&R) ; E. Aurora, Jl, Sep, common in ponds (Dnd) ; Castile, Brad 

 (Flet) ; Avon, Jan (Cls) ; Canandaigua, Jl (NYS) ; Ithaca, Ap, Oct 

 (ShermCU) ; Karner, Jl (NYS) ; W. Hebron, Je (Lg) ; Esopus, Sep 

 (AM); West Pt. (Robn); Peekskill (Sherm); Bear Mt. (Sherm); 

 White Plains, Mar 12-Nov 11 (Sq) ; near NYC (L&B) ; SI, Ap, 

 Je-Oct (L&D); LI: Forest Pk. (Sherm). 



SCUTOPTERUS Crotch 34 

 2612 S. angustatus Lee. Adirondacks, Not (Sherm). 



Rhantus Lacordaire 



2616 R. binotatus Harr. Keene Val., Jl (NYS) ; Newport, May (Yg) ; Cran- 

 berry L., Je (H) ; Sodus Pt., Je (Not) ; E. Aurora in Cazenovia Cr., 

 one, Sep (Dnd) ; Buffalo (Z&R) ; Westfield, May (Not) ; Ithaca, Aug- 

 Sep, Ringwood, Je (Dt) ; Albany, May, Karner, Jl (Yg) ; Delmar, 

 May (NYS) ; Esopus, Sep, Sherm (AM) ; White Plains, Mar 4-Oct 2 

 (Sq) ; NYC (AM) ; SI, Ap (L&D). 



2619 R. calidus Fab. Occurs in N. and S. Am. from Me. (Peak I.) to Brazil 



(Sherm). Peekskill, Aug (Sherm); near NYC (L&B); SI, May 

 (L&D); LI: Rockaway Beach (AM). 



2620 R. sinuatus Lee. Peekskill (Sherm) ; SI (Sherm) ; LI (Sherm). 



2623 R. bistriatus Bergst. E. Concord, Aug, one in a weedy pond (Dnd) ; Ithaca, 



Sep (Dt) ; Wingdale (Sherm); White Plains, Sep (Sq). 



2624 R. tostus Lee. Pike, Ap (NYS) ; Ithaca, Jl 12 (ShermCU) ; Karner, Ap 



(NYS); LI: Forest Pk. (Sherm). 



COLYMBETES Clairville 



2632 C. sculptilis Harr. Ogdensburg, Je (NYS) ; Gloversville, May (NYS) ; 

 Oswego, Je, Bks (NYS); Syracuse, Ap (H) ; Pike (NYS); Buffalo 

 (Z&R), Je (Dnd) ; E. Aurora, Je-Sep, common in ponds (Dnd) ; Avon, 



^ The species of this genus live in sphagnum pools in the deep forests of the North (L. Superipr, 

 White Mts., Adirondacks, and Hudson Bay), and fly considerable distances but are very sluggish 

 in the water (Sherm). 



