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JOURNAL OF ECONOMIC ENTOMOLOGY 
[Vol. 17 
frequently does serious injury. It should undoubtedly be called the 
apple leaf hopper and the other species named for their preferred hosts. 
The Potato Leafhopper (Empoasca fabae Harr.) 
Tettigonia fabae Harr. Ins. Inj. to Veg., p. 186, 1841. 
Tettigonia mali Le B. Prairie Farmer, XIII, p. 330, 1853. 
Empoasca viridescens Walsh. Prairie Farmer, Sept. 6, 1862. Rept. Bost. Soc. 
Nat. Hist., IX, p. 316, 1864. 
Empoasca consobrina Walsh. Ditto. 
Chloroneura malefica Walsh. Prairie Farmer, Sept. 6, 1862. Rept. Bost. Soc. Nat. 
Hist., IX, p. 317, 1864. 
Typhlocyba photophila Berg. Hemip. Argent., p. 273, 1879. (Vide Gill.) 
Empoa albopicta Forbes. 13 Rept. Ill. St. Ent., p. 181, pi. XIV, 1883. 
This is a slender fragile pale green species with an angled head. The 
nymphs are green. Harris described this species as injurious to beans. 
Most of the early literature speaks of it as an apple or nursery stock 
pest. It is primarily a potato pest, its attack producing the hopperburn 
(formerly included under tipburn), that has been so injurious in northern 
and eastern United States in recent years. In periods of abundance it 
also attacks watersprouts and nursery stock of apple, succulent growth 
of raspberries, boxelders, gladioli, and occasionally other trees and 
shrubs and produces similar burning. When potato fields have been 
destroyed it may migrate to and seriously injure beans. The mature 
adults, especially at the mating season, usually exhibit white spotting on 
the vertex and face, a row of about eight spots on the front of the pro- 
notum and a broad “H” on the scutellum. These markings are not on 
the chitin but in the tissues beneath and they largely disappear in the 
dried specimens. No other species occurring in this region could fit 
Harris’ description, particularly “slender, delicate pale green elytra 
transparent,’’ infests beans in July, especially in dry years. 
When the writer found the potato leafhopper (then called mali) 
migrating from potato fields that had been destroyed into adjacent 
bean fields and destroying them, he became curious as to the identity of 
Harris’ fabae and took the first opportunity to examine the types 1 
in the Harris collection. 
The types were found in a fine state of preservation for so fragile an 
insect. They bear the label “No. 253 on corn and beans, August 15, 
1838.” There were originally three specimens on one card of which 
x The Harris collection is well cared for in the Boston Museum of Natural History 
and the writer wishes to express to Dr. C. W. Johnson his appreciation of the privilege 
of examining these and other types. 
