1906 



ENTOMOLOGICAL SOCIETY. 



113 



10 gallons of water. Dusting the plants with pyrethrum insect powder is 

 also useful. If only a few specimens are found in a garden, they can of course 

 be removed by hand and destroyed. 



Fig. 49. Salt-marsh caterpillar and moth. (Chittenden, Bull. 43, Div. of Ent., U.S. 

 Dep . Agr . ) 



Fig. 50. The Yellow Woolly-Bear : a, cater- 

 pillar ; b, chrysalis ; e, moth. 



Woolly-Bears. The caterpillars, or "woolly-bears," of two kinds of 

 arctian moths, commonly oecvir in gardens, occasionally in sufficient numbers 

 to demand attention. These are the Salt-Marsh Caterpillar, Estigmene 

 acrcL'a, Dru., (Fig. 49) and the Yellow Woolly-Bear, Diacrisia virginica, Fab. 

 (Fig. 50.) Both of these caterpillars are, in general, of similar appearance 

 and habits, and feed on a great variety of plants. The former kind is the 

 larger, measuring when full grown about 2h inches in length, and it differs 

 from the Yellow Woolly-Bear in having a darker body and yellow markings 

 along the sides. These caterpillars, as the name "woolly-bear" indicates, 

 are quite hairy, the hairs of the former being mostly always reddish, or 

 reddish brown, while those of the latter vary considerably, the hairs in some 

 specimens being whitish, or pale yellow, while those in others are reddish, 

 or reddish brown. Injury by these caterpillars is most noticed when they 



8 EN. ' 



