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 misidentifl- 
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). 
Fig. 90.—A water-tiger, Dytiscus marginalis: a, 
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). 
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). 
