12 



CALIFORNIA ACADEMY OF SCIENCES. 



Hydroporus latebrosus Lee. 

 Coptotomus interrogatus Fab. 

 Hydrotrupes palpalis Sharp. 

 Ilybiosoma regiilaris Lee. 

 Agabinus glabrellns Mots. 

 Agabus lugens Lee. 



lineellus Lee. 



morosus Lee. 



obsoletus Lee. 



lecontei Cr. 



Ehantus binotatus Harr. 



auisonychus Or. 

 Corj'mbites strigatus Lee. 

 Eretes sticticus Linn. 

 Dytiscus marginicoUis Lee. 

 Thermouectes basilaris var. iuter- 

 medius Cr. 



marmovatus Hope. 

 Cybister ellipticus Lee. 



exiDlanatus Lee. 



Gyrinus plicifer Lee. 

 cousobriuns Lee. 



GYEINID^. 



Gyretes siuuatus Lee. 



HYDKOPHILIDiE. 



Helophorus obscurus Lee. 

 Hydrochus vanolatus Lee. 



vagus Lee. 



sp. uov. 

 Ochthebius rectus Lee. 



costipennis sp. nov. 



puucticollis Lee. 



discretus Lee. 



nitidus Lee. 



interruptus Lee. 



lineatus Lee. 



sculptus Lee. 



holmbergi M'dkl. 

 Hydraena penusj'lvanica Kies. 

 Hydrophilus triangularis Say. 



insularis Lap. 

 Tropisteruus limbalis Lee. 



calif ornicus Lee. 



salsameutus sp. uov. 



ellipticus Lee. 

 Hydrocharis glaucus Lee. 



obtusatus Say. 

 Berosus punctatissimus Lee. 



miles Lee. 



salinus sp. uov. 



subsiguatus Lee. 



Berosus iufuscatiis Lee. 



rugulosus Horn. 

 ChfBtarthria nigrella Lee. 



minor sp. nov. 



pallida Lee . 

 Limnebius piceus Horn. 

 Laccobius ellipticus Lee. 

 Philydrus carinatus Lee. 



nebulosus Say. 



califoruicus Horn. 



diffusus Lee. 

 Helochares normatus Lee. 

 Cymbiodyta punctatostriata Horn. 



dorsalis Mots. 

 Hydrobius fuscipes Linn. 

 Greniphilus subcupreus Say. 



elegans sp. nov. 



rufiventris Horn. 



infuscatus Mots. 

 Dactylosternum cacti Lee. 

 Cercyon fimbriatus Mann. 



luniger Mann. 



fulvipenuis Mann. 



nigriceps Marsh. 



lugubris Payk. 

 Megasternum posticatum Mann. 



