JOURNAL OF THE [January, 



Halcsia tetrapiera, Linn. — Growth very abundant and vigor- 

 ous at the base ; where the trees were leaning, the 

 growth extended well up on the trunk. 

 Fraxinus Americatia, Linn. 

 pubescens, Lam. 

 viridis, Michx. f. 

 excelsior, Linn. 



On the ashes the Frotococcits finds a suitable 

 habitat, as it is abundant and vigorous. 

 Catalpa bignonioides, Walt. — Abundant. 

 Paulownia imperialism Sieb. — Abundant near the base. 

 Sassafras officinale, Nees. — Not abundant nor vigorous. 

 Ulmus Aitiericafia, Nutt. 

 fulva, Michx. 

 racetnosa, Thos. 

 campestris, Linn. 

 Montana, Bauh. 



Growth vigorous and in great abundance. 

 Celtis occidentalis, Linn. — Very little found. 

 Mortis rubra, Linn. 

 alba, Linn. 

 Very little found. 

 Madura aurantiaca, Nutt. — Not abundant. 

 Platanus occidentalis, Linn. 

 orientalis, Linn. 



On patches of the bark from which the outer portion 

 had fallen off last year. 

 Juglans fiigra, Linn. 

 cinerea, Linn. 



On these the growth is neither abundant nor vigorous, 

 and on many none could be found. 

 Carya alba, Nutt. 



porcina, Nutt. 

 amara, Nutt. 



In a group of several of these trees the Protococcus was 

 found on C. porcina only, and on that but sparingly. 

 Quercus alba, Linn. 



macroca?pa, Michx. 

 bicolor, Willd. 



