1046 WALTER H. WELLHOUSE 



Lepidoptera (continued) : Lepidoptera (continued) : 



Saturniidae 3 Yponomeutidae 7 



Arctiidae 3 Gelechiidae 6 



Noctuidae 27 Elachistidae 5 



Notodontidae 6 Gracilariidae 12 



Lymantriidae 7 Glyphipterygidae 2 



Lasiocampidae 10 Nepticulidae 11 



Geometridae 27 Cosmopterygidae 2 



Drepanidae 1 Lyonetiidae 4 



NoJidae 1 Diptera, 16 species: 



Psychidae 1 Cecidomyiidae (Itonididae) 15 



Limacodidae 1 Trypetidae 1 



Cossidae 1 Hymenoptera, 8 species : 



Sesiidae (Aegeriidae) 3 Tenthredinidae 7 



Pyralidae 3 Chalcididae 1 



Tortricidae 30 



The catalog includes insects that have been taken on the Crataegus trees 

 in five continents. The number of species reported from each continent is 

 as follows: North America, 213 species; Europe, 203; Asia, 88; Africa, 11; 

 Australia, 8. All but 45 of the North American species are believed 

 to be cttstinct from those of the Old World. A single Australian species 

 is distinct from those of other continents. The insects recorded from 

 Asia and Africa are found also in Europe. 



It will be noticed that the mites, which have similar habits, are included 

 with the insects in this paper. 



Some helpful references to entomological notes concerning each species 

 have been included in the catalog, which is intended as an aid to other 

 workers who are investigating the insects of our deciduous fruit trees 

 and related plants. 



Grateful acknowledgment is made to Professors Glenn W. Herrick and 

 James G. Needham, of the Department of Entomology at Cornell Uni- 

 versity, under whose direction the work was done and whose kindly criti- 

 cisms and suggestions are appreciated; also to Dr. W. T. M. Forbes, 

 Dr. Edith M. Patch, Chas. W. Leng, Dr. P. B. Lawson, Professor Z. P. 

 Metcalf, Dr. H. H. Knight, Professor Carl J. Drake, Dr. E. P. Felt, 

 and Henry Dietrich, who have kindly aided in the determination of 

 species; to Dr. K. M. Wiegand, who has kindly aided in the determina- 

 tion of species of Crataegus; and to Miss Lela G. Gross for able editorial 

 assistance. 



THE GENUS CRATAEGUS 



Crataegus is the name of a group of trees and shrubs commonly known 

 by their sharp thorns, white flowers (pink or red in a few cultivated 

 varieties) in May, and red or yellowish fruit like minature apples in 

 autumn. It is an ancient Greek name derived from kratos (strength), 

 and was applied to the plants of this genus because of the hardness and 

 durability of the wood. 



