THE INSECTS OF NEW JERSEY. 217 



A. discoideus Dej. Throughout the State in spring, on swampy ground; 



never common in my experience. 



A. baltimorensis Say. Throughout the State; common at all seasons. 

 A. verticalis Lee. Anglesea VIII (Sm). 

 A. piceus Lee. Newark at light (Bf ) ; Woodbury VII (GG) ; Brigantine 



Beach IX (Hn) ; Sea Isle City VI, 15 (Brn) ; Anglesea (W). 

 A. terminatus Say. Throughout the State, fall to spring. 

 A. laetus Dej. Woodbury VII (W) ; Brigantine IX (Hn) ; Anglesea VI, 



VII (div). 

 A. coenus Say. Newark (Bf ) ; Woodbury VII, 30 (W) ; Atlantic City (Li) ; 



Anglesea VI, 21 (Brn) ; rare at all points. 

 A. lugubris Dej. Woodside III, 5 (Bf ) ; Newark (Soc); Gloucester (Li); 



Lahaway V, 28, on cranberry bogs (W) ; g. d. (W). 

 A. sericeus Harr. Throughout the State, in spring; locally not rare and 



sometimes common at light. 

 A. interstitialis Say. Hopatcong (Pm) ; Madison (Pr) ; Orange (Ch) ; 



Ft. Lee, Snake Hill (Bt) ; salt meadows (Bf ) ; Newark, New Bruns- 

 wick (Coll). 



Family HALIPLID^. 



Small, oval water beetles, pointed at each end, the greatest breadth at 

 or a little behind the shoulders of the wing covers. Live in stagnant 

 ponds and ditches in all stages, and are of no economic importance. 

 In this and the following "Dytiscidee" all our material has been de- 

 termined by Mr. Chris. H. Roberts, of New York City, who has also 

 added materially to our records from his own experience. 



HALIPLUS Latr. 



H. fasciatus Aube. Throughout the State V-IX; recorded by all col- 

 lectors, from Garret Mt. to Anglesea, and west to the Delaware. 

 H. punctatus Aube. "New Jersey" (U M). 



H. triopsis Say. Orange Mts. (Bf) ; Spotswood, Ocean Co. (Rob). 

 H. ruficollis DeG. Throughout the State, common, VI-IX. 

 H. longulus Lee. Paterson VIII, 3 (Coll); Monmouth Co. (Rob). 



CNEMIDOTUS Er. 



C. 12-punctatus Say. Common throughout the State in spring and fall. 

 C. edentulus Lee. Paterson 'VI, VII, Great Piece Meadow IX, 3 (Coll); 



Monmouth Co. (Rob), X, 4 (Coll). 

 C. n. sp. Camden Co., VI, 11, X, 4 (Coll). 

 C. n. sp. Paterson IV, 23 (Coll). 

 C. n. sp. New Brunswick VIII, 9 (Coll). 



