XVIII. 



Fig. 1 . Bunch-grass association (Stipa sparlea) on top of a hill, showing the open character of the 



vegetation. The trees in the background are not native. — Mrlanoplus angustipennis, 



Ageneotettix scudderi, Mestobregma thomasi, Hippiscus rugosus, and Mu- 



tillidcp. are common, and in early summer Hippiscux phceni- 



copterus and //. haldemanii. Conocephalus 



robustus also occurs here. 





m 



/ 



FlG. 2. A single plant of Sporobolus cryptandrus growing on blow-sand baa built up a conspicuous 



mound beneath it. 



