158 



NATURAL HISTORY BULLETIN. 



Harpalus retractus Lee. Coolidge, Winslow, Walnut, Williams, Peach 



Spring, common. 

 II. AMPUTATUS Say. Coolidge, Gallup, Winslow, Walnut, Williams. 

 H. CALiGNosus Fabr. Gallup; Williams, August, not rare. 

 H. OBLITUS Lee. Coolidge, Williams, Walnut, common, June to August. 

 H. LUSTRANS Casey. Coolidge, common in May. 

 H. OBLIQUUS Horn. Peach Spring, rare, August. 

 Selenophorus pediculariu-s Dej. Coolidge, not common. 

 Stenolophus conjunctus Say. Coolidge, in spring. 

 S. ochropezus Say. Winslow. 

 A>'isoDACTYLi;s POROSU.s Mots. Williams, August, not rare. 



DYTISCIDyE. 



Laccophilus decipiexs Lee. Winslow, Peach Spring. 

 L. mexicanus Aube. East Bridge, Needles. 



Desmopachria latissima Lee. Peach Spring, very numerous in one lit- 

 tle pool ; August. 

 BiDESSU-S AFFiNis var. macularis Lee. Winslow, very common. 

 CcELAMBUS MEDIALI.S Lec. Winslow, East Bridge, July, August. 

 Deronectes striatellus Lec. Cosnino, not common. 

 Hydroporus tenebrosus var. rusticus Sharp. Cosnino. 

 CoPTOTOMUS INTERROGATUS Fabr. East Bridge, Needles, common in Aug- 

 Agabus griseipennis Lec. Cosnino. [ust. 



Cybister explaxatus Lee. Needles, not common. 



GYRINID^. 

 Gyrinus plicifer Lec. Peach Spring, common. 



HYDROPHILID^. 



Helophorus lacustris Lee. Cosnino. 



H. OBSCURUS Lec. Williams, August. 



OcHTHEBius LiNEATUS Lec. Needles, common in August. 



O. scuLPTUS Lec. Winslow, common in September. 



O. sp. near rectus Lec. Winslow, common in September. 



Hydrophilus TRIANGULARIS Say. Needles, common. 



Tropisternus limbalis Lec. Needles, East Bridge, common. 



Berosus subsignatus Lee. East Bridge, common. 



B. IXFUSCATUS Lec. Winslow, East Bridge, Needles, common. 



Laccobius agilis Rand. Coolidge. [mon. 



Creniphilus subcupreus Say. Coolidge, Peach Spring, Jseedles, com- 



SILPHID.^. 



Necrophorus marginatls Fabr. Coolidge, not common. 

 N. GUTTULA var. meUheimeri Kirby. Walnut, rare. 

 SiLPHA RAMOSA Say. Coolidge. 

 S. TRUNCATA Say. Vinslow, rare. 



