2616. 
2619. 
Zoe 
2636. 
2637. 
2638. 
LENG AND Davis: COLEOPTERA OF STATEN ISLAND 1 
Rhantus binotatus Harr. April, also reported by Linell. 
Rhantus calidus Fab. May, also at Quarry Ponds, Gran- 
iteville. 
Colymbetes sculptiis Harr. April, May, June. 
Dytiscus fasciventris Say. April, June, Nov. A male 
collected October 28, 1894, lived until June 1, 1895. 
Dytiscus hybridus Aube. July, Oct., Sept. (Linell, Ent. 
JNM, til, WES7, Ds 27). 
Dytiscus verticalis Say. April, May, July; sometimes 
found under electric lights, as are the other members of 
the genus. Female collected in the Great Swamp, March 
13, 1898, linvedl tual Jwlhy 3, Us, Sept, (Cbivaelll, lia. 
Asam, tail, SSH, {Ds 27) 
. Hydaticus stagnalis Fab. April, May; also reported by 
Sherman. 
. Hydaticus piceus Lec. April, June, July, Aug., Oct. 
. Hydaticus bimarginatus Say. June; also reported by 
Linell. 
. Acilius semisulcatus Aubé. May, Oct., Nov. 
. Acilius fraternus Manip rll November 
. Acilius mediatus Say. April, August. 
. Thermonectes basilaris Say. April, May, July, Aug., 
SED, Oct, 
. Graphoderes liberus Say. April, May, August. 
. Graphoderes cinereus L. April, June, August. 
. Cybister fumbriolatus Say. May; Aug. 14, 1908, at electric 
light. 
TEAIMOUL SY GAZIRIUN IUD AB, 
. Dineutes vittatus Germ. April, May, Aug., Oct. 
. Dineutes discolor Aube. A common species. 
. Dineutes nigrior Roberts. 
. Dineutes americanus Say. April, May, October. 
. Dineutes hornu Roberts. April, Aug., October. 
. Dineutes emarginatus Say. May, June, Aug., Oct. Clove © 
Valley, June 3, 1905, one sunning itself on a lily pad. 
