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CONTENTS. 



PAGE 



XT. — Thel Parallax of n Cassiopeiae, deduced from Rutherfurd 



Photographic Measures. By Herman S. Davis, 301 



XTI. — On Certam Bacteria from the Air of New York City. By 



Harrison G. Dyar, 322 



XIII. — The Rutherfurd Photographic Measures of Sixty-two Stars 



about n Cassiopeise. By Herman S. Davis, 381 



XIV.— The Arachnida of Colorado. By Nathan Banks, 417 



XV. — Coleopterological Notices, VI. By Thos. L. Casey, .... 435 



i i 



