THE INSECTS OF NEW JERSEY. 22-3 



A. fraternus Harr. Paterson X, 13, Newark marsh VIII (Coll); Madison 

 (Pr); Staten Island (Lg) ; Ft. Lee VII, Monmouth, Ocean Co. (Rob); 

 DaCosta VII, 30, Brigantine VII, 5, Sea Isle V, 31 (Brn). 



A. mediatus Say. Hopatcong (Pm); Ft. Lee, in quarry holes (div) ; Sum- 

 mit V, 9, Delair VIII (Coll); Camden, Gloucester, Atlantic County 

 (W); Lucaston VIII (Dke) ; seashore (Li). 



THERMONECTES Esch. 

 T. ornaticollis Aube. Riverton V, 1, Woodbury VI, 8 (GG). 



T. basillaris Harr. Ft. Lee district (Bt) ; Staten Island IX, X (Ds) ; 

 Delair IX, 30, Westville V, 4, X, 14 (Coll); Woodbury VIII, 7; Brigan- 

 tine VII, 5; Anglesea VI, 15 (Brn); g. d. (Li); the variety "inter- 

 medius" Cr. occurs at Newark (Bf). 



GRAPHODERES Esch. 



G. liberus Say. Recorded from all sections of the State, IV-IX. 

 G. fasciaticollis Harr. Ft. Lee (Bt); Staten Island IV, VIII (Ds) ; New- 

 ark (Coll); Monmouth, Ocean Co. (Rob). 



CYBISTER Curt. 



C. fimbriolatus Say. Caldwell (Cr) ; Newark (div); Monmouth Co. 

 (Rob); Anglesea (Sm). 



Family GYRINID^. 



These are the "Whirligig beetles," so named because of their habit of 

 swimming about in groups or swarms on the surface of ponds or quiet 

 streams and ditches, the individuals often whirling round and round 

 without apparent aim. They are black or a little bronzed, convex above, 

 flattened below, with short, paddle-like swimming legs, the anterior pair 

 long and arm-like. When handled many of them emit a milky white fluid 

 which has a fruity odor, that gives them the local name "Apple-bugs." 

 They are predatory in the larval as well as the adult stage, and among 

 others feed on the larvae of "Anopheles," which are never found where 

 these beetles occur in numbers. 



Mr. Roberts has been good enough to verify the list in this family also. 



GYRINUS Linn. 

 G. minutus Fab. Atco (Rob). 

 G. rockinghamensis Lee. Hopatcong (Pm) ; Atco (Li); Atlantic Co. 



(W); Lakehurst (Rob); Lakewood IX, 2; Ocean Co. VIII (Coll); 



everywhere common. 

 G. fraternus Coup. Spotswood (Rob). 



G. aeneolus Lee. "New Jersey," without specific locality (Rob). 

 G. limbatus Say. Spotswood (Rob); Atco, Egg Harbor (Li). 

 G. dichrous Lee. Hopatcong (Pm) ; Lakehurst (Rob); "New Jersey" 



(U M). 



G. ventralis Kirby. Orange (Ch) ; Spotswood (Rob); g. d. (Li). 

 G. aquiris Lee. Spotswood (Rob). 



