LEPIDOPTERA 



83 



FIG. 55. Larva of the Isabella 

 Tiger-moth. 



approaching winter, the varying amount and distribution 

 of the black color indicating a mild winter or the reverse. 

 Other tiger-moth Iarva3 are 

 common at the same season 

 but they are found on the 

 foliage of several weeds. 



51. Notodontidae. The 

 members of this family also 

 in many ways resemble the 

 Noctuids. The number of 

 species is comparatively 



small and few are injurious. The most common among 

 the Notodontids are the members of the genus Da- 

 tana, of which there are 

 several species. They are 

 noticed in the larval stage 

 when they are variously 

 called " walnut-worms," 

 " maple- worms" and " yel- 

 low-necked apple-caterpil- 

 lars." It is just as easy and 

 much more distinctive to 

 speak of them as D at anas 

 and the generic name is 

 quite widely used as a com- 

 mon name. Datana moths 

 are of moderate size, and 

 of light-brown color, marked 

 with narrow bands of 



darker brown. Their wings have scalloped outer margins. 

 The larvae, when full grown, are dark in color but are 

 marked with several narrow yellow stripes running the length 

 of the body, and with a patch of yellow just back of the head. 



FIG. 56. Larvae of a Datana Moth 

 (Yellow-necked Apple-caterpillars) . 



