Biological Papers. 141 



Arizona is evidently a very rich field, and many possibilities are yet 

 in store. I think it safe to assert that nearly all of those species 

 (nearly sixty in number) marked simply as 'undetermined' are 

 undescribed, and I can most surely state that they are not, or have 

 not yet been, included in the United States fauna." 



One of the most interesting captures among the Coleoptera at 

 our second camp, was a limited number of specimens of the rare 

 Amhlychila hcironi Rivers, which was found among the rocks near 

 the summit of the mountain ridges between which our camp was 

 situated — from 400 to 500 feet above the bottom of the canyon. 



The altitude of the Baboquivari camp is 3750 feet above sea-level. 

 The vegetation is largely of the usual type of the arid regions of 

 the United States — many forms of cactus, yucca, agave or meschal, 

 mesquite, and greasewood — and in the bottom of the canyon are 

 trees of considerable size of the sycamore, walnut, and live oak. 

 There were three quite copious thunder-showers during the three 

 weeks of our stay, but in no case was there sufficient precipitation 

 to cause the slightest run of water in the dry bed of the canyon. 

 My hearty appreciation is hereby expressed of the most efficient 

 services of my associates, Messrs. Adams, Crumb, and Smyth. Mr. 

 Adams, in addition to his energetic work in collecting insects, also 

 made a collection of birds, numbering 34 species, a list of which is 

 contributed by him to the program for this meeting of the Academy. 



I. -LIST OF COLEOPTERA. 

 For valuable services in the determination of species I am in- 

 debted to Mr. Charles Liebeck, of Philadelphia, and Mr. H. C. Fall, 

 of Pasadena, Cal. I am also under obligations to Mr. A. B. Wol- 

 cott, of Chicago, for efficient aid in the family Cleridse. 

 The numbers are those of Henshaw's lists. 



When no locality is appended, the Baboquivari mountains are 

 intended. 



Family Cicindelid^. 

 Amblychila baroni Rivers. 

 12 Tetracha Carolina Linn. Tucson, 

 57 Cicindela lemniscata Lee, 



wickhami W. Horn, 

 646 16-punctata Kl, 



Family CARABiDiE, 

 139 Calosoma semilaeve Lee. 

 213 Pasimachus mexicanus Gray, 

 218 punctulatus Hald, 



220 Scarites subterraneus Fab., var. calif ornicus Lee, Tucson; San Ber- 

 nardino ranch, 1905, 



