222 REPORT OF NEW JERSEY STATE MUSEUM. 



R. calidus Fab. Staten Island V (Ds) ; Camden and Gloucester Cos. (W) ; 



Lakehurst IX, 2 (Rob). 



R. sinuatus Lee. "New Jersey" (Bf) ; Newark (Dn). 

 R. tostus Lee. Fort Lee (Rob). 



The "R. flavogriseus" Cr. of the last edition was based on a misidentifi- 

 cation; the species does not occur east of the Mississippi. 



COLYMBETES Clairv. 



C. sculptilis Harr. Orange Mt. Dist. (div); Ft. Lee (Bt) ; Snake .Hill 

 (Sf) ; Monmouth Co. (Rob) ; Waverly VI, 27, Jamesburg V, 7 (Coll) ; 

 Sea Isle V, 24 (Brn). 



HYDATICUS Leach. 



H. stagnalis Fab. Ft. Lee Dist. (Bt) ; Newark IV, 14 (Coll); Staten 



Island V (Lg) ; Monmouth Co. (Rob). 

 H. piceus Lee. Caldwell (Cr). 

 H. bimarginatus Say. Woodside (Bf ) ; Newark, Delair, Westville X, 4 



(Coll); Ocean Co. (Rob); Anglesea (Rob). 



DYTiSCUS Linn. 



D. fasciventris Say. Hopat- 

 cong (Pm) ; Madison 

 (Pr) ; Caldwell (Cr) ; 

 Westville VII, 3 (Coll); 

 Camden, Gloucester, At- 

 lantic Co. (W). 



D. hybridus Aube. Newark 

 (Coll); Staten Island III, 

 IV, X (Ds) ; Spotswood 

 (Rob) ; Brigantine VII, 5 

 (Brn). 



D. vertical is Say. Newark 

 (Coll); Staten Island III { 

 (Ds) ; Monmouth Co. \ % 

 (Rob). 



D. harrisii Kirby. Caldwell 

 (Cr). 



D. vexatus Sharp. DaCosta 

 (GG). 



* s ' 9<x ^ water-tig 61 ". Dytiscus marginalis : a, 



larva, devouring an Agrion larva; b, pupa; 



c, male beetle, eleytrum of female at 



side; d, anterior tarsus of male; 



e, tarsus of female: a, b, c, 



about natural size. 



ACILIUS Leach. 



A. semisulcatus Aube. Madison (Pr); Ft. Lee, in quarry holes (Bt); 

 Grantwood VIII, 9 (Bno) ; Newark (Coll); Riverton IX, 11 (GG). 



