EBERHARrS OUTLINES OF 



Some gardeners have found sawdust impregnated with 

 carbolic acid, an efficient remedy. 



The tachina fly is another parasite similar in its opera- 



Fig. 28. Southern Cabbage Butterfly (male). 

 tions to the chalcid fly (Pteromalus puparum), mentioned 

 above. 



THE CABBAGE PLUSIA. 

 (PVusia brassica Riley.) 



"In the months of August and September," says Pro- 

 fessor Riley, " the larvae may be found quite abundant on this 

 plant (cabbage), gnawing large, irregular holes in the leaves. 

 It is a pale green translucent worm, marked longitudinally 

 with still paler, more opaque lines, and like all the 

 known larvae of the family to which it belongs, it has but 

 two pairs of abdominal pro-legs, the two anterior seg- 

 ments, which are usually furnished with such legs in 

 ordinary caterpillars, not having the slightest trace of any, 

 consequently, they have to loop the body in marching, 

 as represented in the figure, and are true " Span-worms." 

 Their bodies are very soft and tender, and as they live 

 exposed on the outside of tho plants, and often rest motion- 

 less, with the body arched, for hours at a time, they are 

 espied and devoured by many of their enemies, such as 

 birds, toads; etc. They are also subject to the attacks of at 



