164 THREE KINGDOMS. 



reports and general information in microscopy. Such a journal 

 is The Microscope, a thirty-two-page illustrated monthly, filled 

 with just the matter of most interest to the amateur or profes- 

 sional microscopist. Subscription, $1.00 a year, with 1,700 

 microscopical slides as premium to select from. Sample free; 

 The Microscope Publishing Co., 25 Washington avenue, Detroit, 

 Mich. 



By its enlargement of our natural powers of sight (almost, 

 indeed, conferring a new sense), the microscope is an invaluable 

 aid in the study of nature near at hand. As reliable manufac- 

 turers, we can recommend the firm of Jas. \V. Queen & Co., 924 

 Chestnut street, Philadelphia, who publish a catalogue of micro- 

 scopes which those interested would do well to send for ; they 

 are always glad to advise with intending purchasers regarding the 

 choice of a suitable instrument. A pocket magnifier, at least, is 

 indispensable to the student ; these are illustrated and described 

 in the catalogue above referred to. Botanical collecting cases, 

 with sling strap, are supplied (in two sizes) by this firm ; also 

 plant presses. Insect pins, in all sizes, and sheet cork may also 

 be obtained at Queen's. 



The American Naturalist, an illustrated monthly, devoted to 

 natural sciences in their widest sense, is published at $4.00 per 

 annum, 40 cents per number, by Leonard Scott Publishing Co., 

 Philadelphia, Pa. 



Every member of the Agassiz Association can have the POPULAR 

 SCIENCE NEWS sent to them one year for fifty cents only. The 

 regular price is $1.00. The best and cheapest journal of popular 

 science published in the world. It includes among its regular con- 

 tributors Professors Young of Princeton, Shaler of Harvard, Sum- 

 ner of Yale, Dr. D. G. Brinton of Philadelphia, Dr. Yarigny of 

 Paris, France, and many other prominent scientists. Send a 

 fifty-cent postal note to the publishers, or else your address on a 

 postal card for a free sample copy and full particulars. Address 

 Popular Science News Co., 19 Pearl street, Boston, Mass. 



Those interested in the study of bees, wasps, ichneumon-flies, 

 etc., should obtain a copy of the Synopsis of the families and 

 genera of the Hymenoptera of America north of Mexico, by E. T. 

 Cresson, containing synoptic tables of the genera, also a catalogue 

 of all the species that have been described, and a list of the works 

 and papers that have been published on the subject. 350 pp., 

 8vo, 1887. Published by the American Entomological Society, 

 at Philadelphia, Pa. , by whom a list of other entomological pub- 

 lications for sale will be sent on application. 



The Auk, a Quarterly Journal of Ornithology, is an indis- 



