COLEOPTERA OF THE LOWER RIO GRANDE. IOI 



literally swarming a little south of Alice. Plentiful at Co- 

 lumbus and Houston, along banks of streams or on margins 

 of ponds; apparently preferring bars or other sandy stretches. 

 Mexico (Chaudoir). Specimens were also included in Prof. 

 Townsend's collection. 



C. dorsalis var. saulcyi Guerin. Common on the white 

 sand beach of Padre Island late in June, where it was captured 

 by Prof. Townsend and myself. It is extremely abundant at 

 Galveston and occurs at various other places on the Gulf coast 

 — Florida and Louisiana. A strictly maritime species. 



C. tortuosa Dej. Boca del Rio Grande; Prof. Town- 

 send. This species is not not necessarily maritime, though 

 often common on sea-beaches. It occurs, in several varieties, 

 in Florida, Louisiana, Texas, Arizona, California (near San 

 Diego), Baja California, the West Indies and Mexico. 



C. marginata Fabr. Point Isabel, on beach, one speci- 

 men, July. Occurs in the West Indies along the sea shore, 

 also in similar situations in North and South Carolina, Georgia 

 and Florida. In the neighborhood of New York City it is 

 found on salt marsh. 



C. severa Laf. Point Isabel, rare on the beach in July. 

 A species of wary habit and strong flight, more difficult of 

 capture than any other species met with in the same region. 

 Also known from Louisiana and New Mexico. 



C. togata. Laf. Not rare at Point Isabel, whence speci- 

 mens are in Townsend's collections and my own. More com- 

 mon on salt-flats some distance back from the beach, also in 

 the valleys near the yucca ridges. June and July. Common 

 on salt marsh in Kansas and Nebraska. 



C. circumpicta Laf. Point Isabel, rare in July. Of much 

 stronger flight than togata, and more wary. Only found in 

 the immediate vicinity of the beach here, but elsewhere is not 

 necessarily maritime. Found on salt marsh in Kansas and re- 

 corded from Arizona. The variety -prcetextata I have taken 

 in New Mexico, at Albuquerque. 



