3l6 CALIFORNIA ACADEMY OF SCIENCES. 



Tropisternus lateralis Fab. (ntnibatus Say). 

 Widely distributed in the Atlantic region to Texas, 

 through the Antilles and Mexico to South America. San 

 Jose del Cabo. The synonymy is on the authority of Dr. 

 Sharp, who states that the species is very variable in the 

 extent of the yellow border, as shown by specimens from 

 the southern regions. 



Tropisternus ellipticus Lee. Utah, Texas, Cali- 

 fornia, Arizona. San Jose del Cabo. 



Tropisternus californicus Lee. Oregon, Colorado, 

 Utah, California. Cabo San Lucas. 



Tropisternus nitens Cast. Mexico from Oaxaca 

 south to Brazil. San Pedro Martir. 



Tropisternus apicipalpis Chev. Mexico from Ja- 

 lapa to Costa Rica. Cabo San Lucas. 



Hydrocharis glaucus Lee. Southern California to 

 Arizona. San Luis. 



Berosus rugulosus Horn. Arizona. San Jose del 

 Cabo. 



Berosus miles Lee. Texas. Cabo San Lucas, 



Laccobius ellipticus Lee. Oregon, California, Ari- 

 zona. San Pedro Martir and Cabo San Lucas. 



Philhydrus nebulosus Say, var. cristatus Lee. 

 This species is distributed from Canada to Texas, Ari- 

 zona and California. La Joya, San Ignacio. 



Helochares normatus Lee. Southern California 

 and Arizona. Baja Purisima and Cabo San Lucas. 



Cymbiodyta dorsalis Mots. Southern California. 

 San Pedro Martir. 



