THE BEETLES OF SOUTHERN ARIZONA. 301 



Oodes elegans Lee. Riverside. On banks of Gila. 



Discoderus robustus Horn. Tucson Mts. 



D. cordicollis Horn. Tucson, Globe, Tucson Mts. 



Harpalus obliquus Horn. Tucson. 



Selenophorus gagatinus Dej., var. Tucson. 



Bradycellus rupestris Say, var. congener Lee. Tucson. 



HALIPLIDyE. 

 Cnemidotus simplex Lee. Riverside. Abundant. 



DYTISCID.-E. 



Laccophilus decipiens Lee. Riverside. 



L. pictl's Lap. Riverside. 



Desmopachria LATISSIMA Lee. Riverside. 



Bidessus cinctellus Lee. Riverside. 



B. amandus Lee. Riverside. 



Ccelambis sp. Yuma. 



Hydroporus near addendls Cr. Riverside. 



H. yilis Lee. Pinal Nits. Abundant in a horse trough. 



Copelatus chevrolatii Aube. Tucson. 



Agabus lugexs Lee. Pinal Mts. 



Rhantus atricolor Aub£. Pinal Mts. 



Thermoxectes marmoratus Hope. Riverside. A few specimens were 



taken in quiet pools along the creek bed. 

 Cybister explanatus Lee. Yuma. In ponds along the river bottoms^ 



HYDROPHILID.E. 



Ochthebius puncticollis Lee. Riverside. 



Hydr.esa sp. Riverside. 



Tropisterxus sp. Riverside. 



Berosus puxctatissimus Lee. Riverside. 



B. miles Lee. Yuma. The identification is not certain. 



B. subsignatus Lee. Tucson, Yuma. 



B. exilis Lee. Riverside. Not abundant. 



Ch.etarthria sp. Tucson, Riverside. 



Limxebius piceus Horn. Riverside. 



Laccobius agilis Rand. Riverside. 



Creniphills infuscatus Mots. Pinal Mts. 



SILPHID.E. 

 Ptomaphagus fisus Horn. Pinal Mts. 



PSELAPHID.^. 



Sognorus ocularis Casey. Tucson. 

 Ctenisis raffrayi Casey. Tucson. 



