31 



145. Tlie American Tent-Caterpillar {Malacosoma (Clisiocampa) americanaFsib.). 

 Larvae principally destructive to fruit trees, but also to cherry and a few other 



forest trees in the Eastern States. 

 Exhibit: Adults, eggs. 



146. The Rocky Mountain Tent-Caterpillar (Malacosoma (Clisiocampa) fragilis 

 Stretch.). 



Larvae feed on deciduous forest trees generally and are at times very destructive. 

 Rocky Mountain States. 

 Exhibit: Adults, eggs, larvae. 



147. The Northwestern Tent-Caterpillar (Malacosoma (Clisiocampa) pluvialis 

 Dyar.). 



Larvae on most species of deciduous forest trees in the North western States. 

 Exhibit: Adults, larva, cocoon. 



148. The Californian Tent-Caterpillar (Malacosoma (Clisiocampa) calif omica 

 Pack.). 



Larvae on oak in California. 

 Exhibit: Adults, larva. 



149. The Spring- Canker-Worm (Paleacrita vernata Harr.). 



The larvae feed upon the surface of the leaves of various forest and shade trees; 

 especially upon elm in the Eastern States. 

 Exhibit: Adults, pupa. 



CASE 30. 



150. The Cherry-Leaf Web-Worm (Calocalpe undulata Linn.). 

 The larvae live in webs on the terminal shoots of black cherry. 

 Exhibit: Adults, work. 



151. The Western Oak Span- Worm (Therina somniaria Hulst. ). 



The larvae occur on oak in the Northwestern States, sometimes defoliating trees. 

 Exhibit: Adults, pupae. 



152. The Large Forest Span- Worm (Sabulodes transversata Dru. ). 

 Larvae occur on maple, poplar, oak, etc. 



Exhibit: Adults, larva. 



153. The Crinkly Flannel Moth (Lagoa crispata Pack.). 



The larvae, which somewhat resemble the slug caterpillars, feed upon oak, poplar, 

 and a variety of other deciduous trees. 

 Exhibit: Adults. 



154. The Oak Web-Worm (Archips (Caccecia) fervidana Clem.). 



Larvae live in colonies on oak, sheltered by a web inclosing leaves and a mass of 

 excrement. 



Exhibit: Adults. 



155. The Slug- Caterpillars (Family Cochlidiidx.). 



These bright-colored slug-like larvae feed very generally on foliage of most decidu- 

 ous trees. 



Exhibit: the following species: Sibine stimidea Clem., adults, larva, cocoon; Euclea 

 delphinii Bdv., adult; Euclea indetermina Bdv., adult. 



