io8 



HA RD WICKE'S SCIENCE- G OSSIP. 



content ourselves with announcing the fifth edition, 

 and are delighted to do so ; School Hygiene, by 

 Dr. Arthur Newsholme (London : Swan Son- 

 nenschein & Co.) is a book which every member of 

 school-boards, and every school-master and school- 

 mistress ought to read. The Greyhound, by Hugh 

 Dalziel (London : Upcott Gill). A handy and 

 useful monograph of this well-known breed of dogs. 



How to use our Eyes, by John Browning (London : 

 Chatto cS: Windus). The fifth edition of one of the 

 most useful and important cheap little books that 

 ever was published. 



We have also received Sonnets on Nature and 

 Science, by S. Jefferson (London : T. Fisher Unwin), 

 in which one clearly sees how largely the sympathetic 

 study of nature influences the poetic feeling. A 

 Classified and Descriptive Catalogjie of Scientific Books, 

 (London : Geo. Philip & Son). A most useful work 

 of reference, in which all modern books in every 

 department of science, are catalogued, with prices, 

 publishers, &c, and The Garner, vol. i. (London : 

 \V. E. Bowers), edited by A. Ramsay, F.G. S. Full 

 of valuable and varied information, besides papers 

 dealing with original work and observation. 



Through the Fields with Linnceus, by Mrs. Florence 

 Caddy,- 2 vols. (London : Longmans). A delightful, 

 sympathetic, and altogether charmingly written life 

 of the immortal naturalist, written by a cultivated 

 lady, who is evidently familiarly acquainted with 

 Sweden and Swedish life. We have read the vols, 

 through with real pleasure, and henceforth Linnaeus 

 will be to us a personal friend — not a literary or 

 scientific abstraction. Mrs. Caddy's book is a gain 

 both to literature and science. 



Malt and Malt Making, by H. Stopes (London : 

 F. W. Lyon). This is a large and thoroughly 

 exhaustive treatise on the subject. It forms the most 

 complete manual of malt and malting in our language- 

 The author is a trained scientific man, and an educated 

 writer. No brewer, no maltster, indeed, nobody 

 connected with the important trade of brewing, ought 

 to neglect the study of Mr. Stopes' book. Its range 

 is large, theoretical as well as practical, and shows a 

 thorough acquaintance with the litera ture, as well 

 as the science of the subject. 



TEETH OF FLIES. 



By W. H. Harris. 



No. ii.—APHROSYLUS RAPTOR, Walker. 



/1PHROSYLUS RAPTOR, the subject of the 

 yj- present illustration, is a marine species 

 belonging to the family of the Dolichopidre, which 

 includes a large number of genera and species. They 

 are generally small bright flies, with a metallic lustre 

 and colouring, brisk and joyous in their movements. 

 The present is rather an aberrant species, and is not 



at all a very distinguished member of the family in 

 point of colour. It is about two-tenths of an inch 

 long ; slightly built, its legs are fully three-tenths of 

 an inch in length, which gives the fly a very wiry 

 appearance. 



It can, however, lay claim to being rather rare, 

 and, unless specially sought for, is not likely to come 

 under the observation of casual visitors to its habitat. 



I made its acquaintance while staying at Ilfracombe 

 during the month of July, 1885, while searching the 

 rock pools at low water. Phantom-like it would flit 

 from the damp sea-weed when approached, and with 

 great difficulty could its whereabouts be re-discovered 

 among the varied tints of rock and algce. Occa- 

 sionally it would be found on the surface of a small 



SCALE OF 1000™ OF AN INCH 



Fig. 57. — Teeth of A phrosylvs raptor. A, upper jaws separated , 

 showing the denticulated labrum ; v, the single lower jaw. 



pool, where it appeared as weirable to take care of 

 itself as on land, and would take its flight from thence 

 as readily as a seabird would from the surface of the 

 sea. 



Watching one rise from such a position, I followed 

 it to a rock now quite dry. Carefully approaching 

 it, I was surprised to see the region of the mouth 

 reflected a bright silvery light. The first impression 

 was that a drop of water had become entangled in 

 the mouth organs. But a moment's observation 

 dispelled the illusion ; the flickering motion of the 

 palpi was the cause. These were in constant motion, 

 and at certain angles reflected the light with a gem- 

 like brilliancy. 



The palpi are oval-shaped plates, clad with very 

 fine hair and short dark setie (probably the external 

 appendages of nerve end organs, as the palpi are 



