214 ENTOMOLOGICAL NEWS. [September, 



ARIZONA ANTS. 



By Dr. H. W. FENNER, Tucson, Ariz. 



No. i. Pogonomyrmex rugosus Em. (var.). Large and nu- 

 merous nests, one large opening two to four inches in diameter 

 on surface level, found none elevated; a disk was cleared around 

 each nest from two to twelve feet in diameter; ants out very eaily 

 in the morning and all in by sun down; do not close nests, but 

 have a great many sentries just within the opening; ants busy 

 carrying seeds. 



No. 2. Pogonomyrmex calif arnica Buckley. Quite numerous 

 through town; have one opening on surface level with excavated 

 dirt all taken to one side. _When disturbed all disappear within 

 nest; out at work early in morning, all in nest at noon and out 

 again in afternoon; close nest at night; are always busily engaged 

 carrying seeds, the husks of which are afterwards thrown out. 

 These ants, while in active motion, ^arry abdomen erect, at right 

 angle (nearly) to the body. 



No. 3. Have from one to three openings to nest, all observed 

 were on surface level and surrounded by irregular rings of ex- 

 cavated dirt; one to three columns of ants following certain roads 

 working from each nest; observed one column for three weeks 

 which, for the whole time, followed the same road to a fig tree. 



No. 4. Pheidole megacephala Rog. (var.) 



No. 5. Pogonomyrmex subnitidus Em. (var.). Very small 

 colonies, but quite numerous, easily alarmed; had to dig up nest 

 in order to catch any. Have small mounds on one side of nest. 

 Habits not observed. 



No. 6. Aph<znogasterpergandeiM.zyr. Large colonies, single 

 opening on surface level, excavated soil or gravel, irregularly 

 around nest. Habits not noted. 



No. 7. Aphtznogasler sonorce Perg. Large colonies, nest very 

 slightly elevated with two or three openings, from one to three 

 inches in diameter ; very irregular in outline ; observed some 

 colonies where there seemed to be no elevation to nest. Ants 

 occupied in gathering seeds and pieces of grass. 



Nos. 8 and 9. Pheidole near jabricatus Em. Evidently major 

 and minor; very small nests and colonies; worked in columns. 

 The major very slow and sluggish; minor active and belligerent. 



No. ii. Pogonomyrmex calif arnica Buckley. Small colonies 



