ZOOLOGY 99 



A. ursinus at Astragulus caryocarppus, Phacelia corruga, 

 also in the mountains on Ribes. 



Bombus rnorrisonii, Cress. Common at desert willow 

 (Cheilopsis), and Robinia neo-mexicana but also at Cleome, 

 Rudbeckia, (Jemez Mts.) Asclepias and wild plum in the 

 mountains. Up into the Yellow Pine Assn. where it is 

 largely replaced by B. nevadensis. 



Bombomelecta fulvida, Cress. Abundant at Astragulus 

 caryocarpus, but only two ever taken at loco. The smaller 

 narrower blossoms of the latter keep away many bees that 

 are abundant on the former. One of our most abundant 

 bees early in March. 



Dioxys phaceliae, Cldl. A very common bee about Phacelia 

 corruga, Biscutella ivizlizenii. 



Halictus cressoni, Rob. At Berlinderia and "chimaja". 



ARROYOS OF THE "MESA" 



Brachystola magna, Girard. In the shallow depressions 

 or "draw" in the mesa above the place where a definite ar- 

 royo developes there is found a society of which certain 

 quick-growing annual grasses are most conspicuous. Here 

 and here only have I ever found this big nearly wingless 

 "Lubberly Locust," a good illustration of an insect restricted 

 to a very limited habitat. It occurs west of San Mateo to- 

 wards the continental divide (Gee) and extends east to Kpns., 

 Okla., Wy. and Colo. "Common in west central Texas." But 

 Cockerell states that in his experiences it "frequents open 

 rocky ground." (Scudder and Cockerell in "First List of 

 New Mexico Orthoptera, Davenport Acad. of Science, Proc. 9.) 



Heliastus aridus, Bruner. This grasshopper which was 

 first described from Albuquerque occurs very generally 

 over the mesa and well into the Cedar Ass'n. It seems how- 

 ever to be particularly abundant in these arroyos where its 

 mottled colors agree perfectly with the gravelly surface. 

 April 16 is the earliest date of appearance of adults which 

 may be found in late Nov. 



Pentatoma sayi. Abundant on Croton and Russian Thistle. 



Reuterscopus ornatus. Taken only on Polynesis bracteata 

 ^hich is confined to these arroyos. 



* Dicerca obscura. 



Eupagoderes wickmannii, Sharp. 



