78 



Psyche 



[June 



Sanderson's Insect Pests (p. 417). D. groteella, feeding upon hazel 

 and D. robiniella upon locust, are both at times injurious to forest 

 trees. Accounts of these may be found in Packard's Insects 

 Injurious to Forest Trees, with methods of control should the 

 larvae become a pest. 



The following is a summary of what is now known of the habits 

 of the genus : 



Social habits. 



Gregarious 10 



Solitary 22 



Hibernation. 



As egg. '. 3 



As larva 4 



As adult . 19 



Feeding habits. 



On leaves 67 



On buds or flowers 18 



On bark or twigs 1 



On stem 6 



On fruit 4 



Economic importance. 



D. groteella on hazel 



D. robiniella on locust 



D. heracliana on parsnip 



Methods of obtaining shelter. 



Leaf rollers 24 



Tube makers 23 



Web spinners 57 



Leaf miners 3 



Stem borers 5 



Pupation. 



On ground 39 



In umbels or leaves 17 



In stem 3 



In gallery 1 



Food plants. 



Umbelliferse 59 



Compositse 33 



Leguminosse. H 



Cupuliferae 5 



Rutacese 5 



Euphorbiacese 2 



Hypericaceae 2 



Salicaceae 2 



Coniferse . . , 2 



Cistacese . • • • 



Lythraceae 



Rosacese 



Burseraceae 



Malvaceae 



Rhamnaceae 



Polygonaceae 



Bibliography. 

 (Supplementary to catalogues cited.) 



Barnes, Wm., and J. McDunnough. Check list of the Lepidoptera 



of Boreal America, Decatur. (1917.) 

 Busck, August. Descriptions of North American Tinenia. Proc. 



Ent. Soc. Washington, Vol. 9, pp. 88-92. (1908.) 



