Dytiscidae 259 



2564 A. discolor Harr. Warren Co, Sherm (Fall) ; Cranberry L., Je (H) ; Buf- 

 falo, Jl 10, MCV (Fall) ; Washington Co, Sherm (Fall) ; W. Hebron 

 (Lg). 



2563 A. confinis Gyll. "NY" (Gyll) ; Washington Co, Aug (ShermCU). 



2575 A. anthracinus Mann. Cranberry L., Je (H) ; White Plains, Sep (Sq). 



2579 A. nigroaeneus Er. Ringwood, Je (Dt). 



2580 A. gagates Aube. Newport, Je (Yg) ; Cranberry L., Je-Jl (H) ; Ilion 



(NYS) ; Pike (NYS) ; E. Aurora, Jl, one in pond (Dnd) ; Chautauqua, 

 Thompson (Sherm) ; Ithaca, Jl 30 (ShermCU) ; McLean, Aug, Ring- 

 wood, Jl (Dt) ; Esopus, Sep (AM) ; Poughkeepsie, May (NYS) ; West 

 Pt. (Robn) ; Peekskill, in spring holes (Sherm) ; White Plains, Ap 

 20-Oct 4 (Sq) ; NYC (L&B) ; SI, Je-Aug (L&D). 



ILYBIOSOMA Crotch 



2587 I. bifarius Kby. Buffalo (Z&R) ; Waterville, Je (Not) ; Karner, Ap 

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



ILYBIUS Erichson 



2590 I. pleuriticus Lee. Cranberry L., Je (H). 



2593 I. quadrimaculatus Aube. Peekskill (L&B). This determination should be 



verified (Fall). 



2594 I. ignarus Lee. Peekskill, Jl 26, in a woodland pool (Sherm) ; SI (Sherm). 



2595 I. angustior Gyll. Cranberry L., Je (H). 



2598 I. biguttulus Germ. Keene Val., Jl (NYS) ; Saranac Inn, Jl (NYS) ; 

 Newport, Je (Yg) ; Cranberry L., Je-Aug (H) ; Mooers, Sep (Not) ; 

 Buffalo (Z&R) ; Pike (NYS) ; E. Aurora, Aug-Sep, frequent in ponds 

 (Dnd) ; Oneida Co, Jl 11, Clms (Dt) ; Ithaca, Je-Aug (ShermCU) ; 

 Ringwood, Jl 7 (Vdyk) ; Windsor, Je (Not) ; W. Hebron, Je (Lg) ; 

 Albany, Je (Yg) ; Wingdale (Sherm) ; Kaaterskill (Sherm) ; Peekskill 

 (Sherm); White Plains, May 11-Nov 11 (Sq) ; near NYC (L&B); 

 SI, Feb, May-Oct (L&D). 



2600 I. confusus Aube. Sodus Pt., Je (Not) ; Ithaca, May 4 (ShermCU) ; 



Valley Falls, May (NYS) ; Esopus, Sep (Sherm) ; Kaaterskill 

 (Sherm) ; Bear Mt. L., Jl (Sherm) ; White Plains, Je 6-Jl 11 (Sq) ; 

 NYC (AM); SI, Jl (L&D). 



2601 I. oblitus Shp. Cranberry L. (H) ; Buffalo, Je, Esopus, Sep (AM) ; White 



Plains, Sep-Oct (Sq). 



Agabetes Crotch 



2602 A. acuductus Harr. Ausable Pt., Sep 23 (Not) ; Warren Co (Sherm) ; 



Buffalo (Z&R) ; Ringwood, Je (Dt) ; West Pt. (Robn) ; Peekskill, 

 May-Je (ShermCU) ; White Plains, Mar 30-May 3 (Sq) ; SI, May-Jl, 

 Sep (L&D); LI: Forest Pk. (Sherm). Usually in woodland pools 

 (Sherm). 



Mat US Aube 



2603 M. bicarinatus Say. Warren Co, Aug (Sherm) ; Nassau, Ap (NYS) ; 



West Pt. (Robn) ; Peekskill, May, Jl, Sep (ShermCU) ; White Plains, 

 Mar 12-Nov 11 (Sq) ; near NYC (L&B); SI, May (AM); LI: 



