304 CALIFORNIA ACADEMY OF SCIENCES. 



approach the water and the entire region is comparatively 

 barren with but few springs or water holes and is not un- 

 like many parts of Arizona. 



The most interesting and characteristic part of the 

 peninsula is that called appropriately the Cape Region 

 and which Mr. Brandegee defines as follows: " By the 

 ' Cape Region ' is meant that part of the peninsula south 

 [east] of a line drawn along the northern [western] base 

 of the mountains from Todos Santos to La Paz." The 

 brackets in the above quotation are my own, as the maps 

 show that the line from Todos Santos to La Paz is a 

 north and south line. 



As might be inferred, the coleopterous fauna of the 

 San Diego region extends southward along the ocean 

 side of the peninsula, with no striking admixture of spe- 

 cies new or foreign to it. There are, however, long 

 reaches of the coast region not yet visited. 



From the northern end of the peninsula, nearly mid- 

 way between the gulf and sea coasts and about 100 miles 

 south of the political boundary line of California, an in- 

 teresting series of 65 species has been sent me from the 

 region of the San Pedro Martir Mountains, showing a 

 very decided relationship with the fauna of the regions of 

 Los Angfeles and Santa Barbara. 



The fauna of the gulf coast region indicates a decided 

 relationship with and in fact is a continuation of the fauna 

 of Arizona and the Colorado Desert, quite a number of 

 the species extending to the lower Rio Grande of Texas, 

 and a few species have been recognized as identical with 

 those of the northern states of Mexico. 



The Cape Region is by far the most interesting and 

 peculiar, from the fact that we have the greatest number 

 of new forms with a decidedly tropical aspect and rela- 

 tionship. This region could be excluded from the Boreal 



