112 NATURAL RESOURCES SURVEY 



Pieris protodice. From the valley to the Spruce Ass'n. 

 P. napi is less common but has about the same distribu- 

 tion. 

 Pyrameis cardui. See remarks under Hudsonian Zone. 



TERMITES 



Termes sp. Are quite common throughout the Sonoran. 



Chrysophus sp. The "Golden-eyed Lace-wings" are com- 

 mon over the entire region. They have been found hiber- 

 nating under the bark of a dead pinon. 



SUMMARY AND CONCLUSIONS. 



The plant associations are here well denned and they form 

 the best basis for a nomenclature of the animal habitats be- 

 cause they are the result of definite complexes of physiogra- 

 phic and climatic factors and are readily and quickly re- 

 cognizable. 



The distribution of animal associations corresponds with 

 that of the plant associations and is just as sharp and de- 

 finite, but requires much closer study, owing to the migra- 

 tory habits and small size of many, particularly at certain 

 seasons. The distribution between mountains, steppe, and 

 valleys is particularly sharp. 



Nearly all of the plants and animals of the mountains are 

 identical with, or are closely related, to those of the more 

 eastern and northern states. Because of this we Would ex- 

 pect cultivated crops which are a success thereto thrive also 

 in our mountains. 



The relationships of the steppe species, on the contrary, 

 are distinctly with the arid southwest. 



The valley forms are a mixture of the two faunas. Among 

 both plants and animals many species or closely related 

 species are common to both mountains and valleys w r hile ab- 

 sent from the steppe or mesa. This and other facts point to 

 moisture as being the most important single factor in deter- 

 mining local distribution. Practically, this means that 

 many if not most northern crops should be successfully 

 grown in the valley and even on the mesa if moisture can be 

 supplied as by irrigation. 



The insects particularly of the Sandias are as a whole dis- 

 tinctly those of the more humid east and north in families as 

 well as species. Crickets abound, of beetles the families 



