ZOOLOGY AND BOTANY, MICROSCOPY, ETC. 79 



E. W. D. Holway* redescribes the rust hitherto recorded on plants 

 of Salvia in North America. He adds diagnoses of several new species 

 that he himself has discovered. 



Joseph F. Clevengerj publishes preliminary notes on the genus 

 Phyllachora ; 44 species occur in North America and of those he has 

 examined 22. The notes deal largely with the differences between the 

 size of the spores in the specimens examined and of evidently similar 

 species recorded by authors. The writer supplies fuller diagnoses in 

 several instances. 



D. D. Sumstine J considers that Gomphidius rhodoxanthus ought 

 to be placed in the genus Boletinus. He gives his reasons for the 

 suggested change and the various synonyms of the fungus. 



Contributions to Mycology. § — Franz v. Hohnel describes a new 

 species of Exidiopsis. He hazards the opinion that Stypella may be 

 identical with Exidiopsis. He records and describes several new species, 

 and gives notes on some species of Gorticium and also on Actinonema 

 Rubi, which has been recorded under various names. The new genera 

 he has discovered are : Acanthostigmella (Pyrenomycete), Didymascina 

 Hysteriineag), and Thyrsidina (Melanconieas). Hohnel finds that the 

 spot disease of Robinia chronicled by many observers is due to a 

 Phleospora. The fungus has been placed in five other genera by various 

 authors. Exosporium Ononidis Auersew, which lhas been imperfectly 

 described, is a Gercospora with elongate brownish septate spores. 



Plant Pathology.|| — M. Hollrung's account of the diseases of plants 

 recorded in 1904 has just been issued. The volume includes an account 

 of the ravages caused by animals as well as by fungi or other plants. 

 The first division is devoted to the general consideration of phyto- 

 pathology. Then follow special pathology and the diseases that attack 

 the various plants. These are discussed, the views and discoveries of the 

 various workers are stated, and the methods of cure considered by them 

 to be most effective. Plant hygiene occupies a more important place in 

 the volume than heretofore, owing to the attention that is being 

 directed to the producing of immune varieties, and to studying the soil 

 and other conditions that help to keep the plants healthy and resistant. 

 Under plant therapeutics are discussed the various means that have been 

 tried to stamp out disease during the year : certain fungi are found use- 

 ful in exterminating animals, and some insects and ants are encouraged 

 that prey on other insects or on plants considered undesirable. Fungi- 

 cides and insecticides are also passed under review. A full index 

 completes the volume. 



Handbook of Technical Mycology.lf — F. Lafar has issued the seventh 

 part of this work, beginning the fourth volume. A. Kloecker writes the 

 chapters on Saccharomycetes and Schizosaccharomycetes, giving an 

 account of their development and life-history. F. Lafar and P. Lindner 



* Journ. Mycol., si. (1905) pp. 156-8. f Tom. cit., pp. 159-64 (1 pi.). 



t Tom. cit., pp. 165-6. § Ann. Mycol., iii. (1905) pp. 323-39. 



|| Jabresb. Pflanzenkr., vii. (1904). Berlin : Paul Parey, 1905, viii. and 374 pp. 

 Tl Handbuch der technischen Mykologie, lief 7, Jena, 1905. See also Bot. 

 Centralbl., xcis. (1905) p. 424. 



