262 Dytiscidae — Gyrinidae 



ACILIUS Leach 



2651 A. fraternus Harr. (seiiiisulcatus Aube, ace. Sherman). Mt. Marcy, Keeiie 



2652 Val., Saranac Inn, Jl (NYS) ; Wilmington, Aug (Dt) ; Cranberry L. 

 (H) ; Pike, Ap (NYS) ; Syracuse, May (H) ; Sodus Pt, Je (Not) ; 

 Batavia, Je (Kngt) ; E. Aurora, Buffalo, Je, Sep, common in ponds 

 (Dnd) ; Canandaigua L., Jl (NYS) ; Livingston Co, Dec (Lee) ; 

 Geneva, Avon, Dee (Cls) ; Westfield, May (Not); Ithaca, Sep (Dt), 

 Oct (Sherm) ; McLean, Aug (Dt) ; Karner, May (NYS) ; Esopus, 

 Sep (AM) ; West Pt. (Robn) ; Peekskill (Sherm) ; White Plains, 

 Jl-Nov (Sq) ; SI, Ap-May, Oct-Nov (L&D). 



2653 A. mediatus Say. Ithaca, Aug 28 (ShermCU) ; Peekskill, Sep (Sherm) ; 



SI, Ap-Aug (L&D). 



Thermonectes Crotch 



2654 T. ornaticollis Aube. Ithaca, Jl 18, Stedman (ShermCU); NYC (L&B). 



2655 T. basilaris Harr. Buffalo (Z&R) ; Canandaigua L., Jl (NYS) ; Ithaca, 



Sep (Dt) ; Karner, May (NYS) ; Peekskill (Sherm) ; White Plains, 

 Oct (Sq); NYC (AM); Van Cort. Pk. (SI Mus) ; SI, Ap-May, 

 Jl-Oct (L&D); LI: Brooklyn, May (Ds). 



Graphoderes Thomson 



2659 G. liberus Say. Syracuse, May (H) ; Buffalo (Z&R) ; Ithaca (ShermCU) ; 



McLean, Aug (Dt) ; Oneida, Je 29, Clms (Dt) ; Peekskill (Sherm); 

 White Plains, Mar 12-Oet 15 (Sq) ; NYC (L&B) ; SI, Ap-May, Aug 

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



2660 G. cinereus L. Ithaca (Dt) ; McLean, Aug (Dt) ; West Pt. (Robn) ; NYC 



(L&B) ; SI, Ap, Je, Aug (L&D) ; LI: Astoria (AM). 



SUBFAMILY CYBISTERINAE 



CybISTER Curtis 



2667 C. fimbriolatus Say. Oswego Co, Je, Bks (NYS) ; Ithaca, Aug-Sep 

 (ShermCU) ; West Pt. (Robn) ; White Plains, Sep 2 (Sq) ; Van Cort. 

 Pk. (SI Mus) ; NYC (L&B) ; SI, May, Aug (L&D) ; LI: Orient Pt. 

 (NYS). 



Family GYRINIDAE ^s 

 Dineutes MacLeay 



2671 D. vittatus Germ. Ithaca (AM) ; Poughkeepsie (NYS) ; White Plains, 

 Je-Oct (Ang, Sq) ; Putnam Co, May (Lg) ; Nyack, Oct (AM) ; Van 

 Cort. Pk., May (Lg) ; SI, Ap-Oct (L&D) ; LI: Yaphank (Ang). 



2674 D. discolor Aube. Mooers, Sep (Not) ; Oneida Co, Clms (Dt) ; Avon, 

 Geneva (Cls) ; Ithaca (Dt) ; L. George, Aug (AM) ; Windsor, Je 

 (Not) ; Schoharie, May-Je (Dt) ; Albany, Poughkeepsie (NYS) ; 

 White Plains, Je (Sq) ; NYC and vie. (AM); SI (L&D); LI: 

 Cypress Hills, Babylon, May-Je (AM). 



^5 H. C. Fall has kindly read the manuscript for this list, and has made some changes in 

 synonymy and added some records. 



