March, 1902.] A New Species of Phyllosticta. 



223 



PANDORINA 



morum 



PEDIASTRUM 



angulosum 

 boryanum 

 simplex 

 tetras 



PITHOPHORA 



oedogonia 



PLEUROTAENIUM 



trabecula 



PROTOCOCCUS 



viridis 

 RAPHIDIUM 



polymorphum 

 SCENEDESMUS 

 quadricaudatus 

 polymorplius 

 SPIROGYRA 



adnata 



bellis 



communis 



crassa 



decimina 



A NEW SPECIES OF PHYLLOSTICTA. 



J. B. Ellis and W. A. Kellerman. 



This species was found in October on fallen leaves of the Whit 

 Poplar (Populus alba) at Waynesville, Ohio (W. A. Kellerma' 

 occurring in small, light-colored spots on the upper surface 

 associated with an ascomycetous fungus. It may be descr' 

 follows : 



Phyllosticta alcides Ell. & Kellerm. — Spots mereous, 

 epiphyllous, subindefinite, 2-4 mm. diameter, raisiup- and punct- 

 uring the epidermis, soon perforated above. Sporules short- 

 fusoid or oblong, yellowish, 2-3-uucleate, 7-15 (mostly 7-10) x 3- 

 2,^2 microns. Found associated with Leptosphaeria alcides Sacc, 

 of which it is apparently the spermogonial stage. 



" Insects Injurious to vStaple Crops" is the title of an admir- 

 able compilation by Prof. K. Dwight Sanderson, of the Delaware 

 Agr. Exp. Station, who has brought together the most essential 

 matter regarding our principal farm crop pests in the group of 

 insects. The work will be a welcome one to students and 

 teachers, though it necessarily occupies a somewhat limited field, 

 so far as school instruction goes. Its greatest service should be, 

 as it is evidently intended to be, in enabling the progressive 

 farmer to get the benefit of the immense advance made in methods 

 of treating injurious insects which has resulted from the work of 

 economic entomologists during the last decade or two. — H. O. 



