July, 190S.] 



CATERPILLARS INJURING FOLIAGE. 



221 



than the others, being qnite lilackish in color, the head of the 

 caterpillar is black, the retractile tubercles on the middle of the 

 tenth and eleventh segments are orange, and projecting from each 

 side of the second abdominal segment is a tuft or pencil of black 

 hairs, often with a slighter and shorter pencil in front, which is 

 wanting on the other two species. (See figure 10, b.) 



The full grown caterpillar spins a loose cocoon upon a leaf 

 or branch and transforms to the pupa during the first or second 



^iA, 



Fig. 9. Eggs of Rusty Tussock Moth. ( Notolophus antiqua Linn.) 



week in June ; 12 to 15 days later, or about June 20, the moths 

 emerge. 



Moth. — The female moth is wingless and looks very little like 

 the male, being of a grajdsh color, looking more like a fat spider. 

 She crawls out upon the cocoon where next day she lays her eggs 

 and soon dies. The male is a rust-brown color with wings ex- 

 panding slightly over an inch. The fore-wings are crossed by 

 two darker bands and have a conspicuous white spot near the 

 anal angle. 



The eggs laid by these moths hatch early in July (July 5, 

 1905) and the caterpillars from them become mature in late 

 summer. From them develop moths which lay eggs that remain 

 on the trees over winter, thus making two complete broods each 

 year. 



As far as observed this species does not occur in such large 

 numbers or do so serious damage as the "White-marked Tussock 



