272 JOURNAL OF THE ROYAL HORTICULTURAL SOCIETY. 



didaofylus, Latr.V known locally as the "changa," is reported to do damage 

 to the extent of 100,000 dollars annually in Porto Rico, injuring especially 

 l ane, Tobacco, and Rice. It is a native of the hotter parts of America, 

 feeds upon plant-roots, and is subterranean and nocturnal in its habits. 

 I'.; ids and lizards feed upon it; other enemies are not known. Clean 

 cultivation, ploughing during winter and spring, trap lanterns when the 

 changa is Hying at night, arsenic or Paris green sprinkled on chopped 

 grass and distributed in small patches just below the surface of the soil 

 are the remedies suggested. The insect is described and illustrated. 



F. J. C. 



Mosses : Hypnum (Harpidium), Drepanocladus (Beih. Bot. 

 Cent. xiii. ht. 4, p. 388 ; 2 plates). — Herr C. Warnstorf gives a thorough 

 description, with analytical key, of the European species of this sub- 

 division. The literature to date, the synonymy, the distribution and 

 characters of some of the less well-known species are given. As regards 

 these last the treatment is exceedingly thorough and illustrated by many 

 figures of the leaves &C. — G. F. S.-E. 



Mountain Gardens (Le Jard. May 5, 1903, p. .12^.— Under 

 the auspices of the authorities of the town of Lucerne two mountain 

 gardens are now being established, one on the Rigi, the other on 

 Pilatus, where mountain plants from all parts of the world are to be 

 grown and tested. — C. W. D. 



Muscari paradoxum. By Sir J. D. Hooker (Bot. Mag. tab. 7873).— 

 Nat. ord. Liliaccce, tribe Scillece. Native of Persia. Leaves are 12-18 

 ins. long. The scape is stout, with a dense spike of very dark violet-blue 

 flowers with green margins. — G. H. 



Musk Melons, Origin of American Varieties of. By F. W. Rane 



(U.S.A. Agr. Exp. Stn. New Hampshire, Bull. 96, p. 125; November 

 1902). — The writer gives letters received from many seedsmen in answer 

 to his question regarding date of introduction, origin, parentage, &c, of 

 many varieties. — E. A. B. 



Mycorhiza. By Profs. L. Hiltner and C. v. Tubeuf (Nat. Zeit. 

 Land Font. i. pp. 9-25 and 67-82, 1 plate and 3 figs. ; 1903).— The joint 

 editors of this new periodical, the organ of the departments of Agriculture 

 and Forestry in the QniYersity of Munich, have already done important 

 work on mycorhiza. The two articles included here are reviews of recent 

 work, and new observations by the authors. 



I Prof. Hiltner, associated with Prof. Nobbe, is well known by his 

 investigations on the root-tubercles of Leguminosce. Of less economic 

 importance, but no less interesting, are his researches on root-tubercles of 

 Alder, Elaagnm, and Podocarpus. Hiltner's review deals chiefly with a 

 woent pap ron root-tubercles of trees by Prof. Shibata (Japan); leaving 

 the discussion aside, we give the chief results. The large swellings on 

 n nN " f Alder originate from action of a bacterial organism 

 ,; 1 "■''>' I and successfully used to infect Alder seedlings. 



Infection takes place through the root-hairs (as in Leguminosa), and these - 



