Insects Injurious to the Mango. 9 
THE RED-BANDED THRIPS. 
The red-banded thrips,* an important enemy of the cacao in the 
West Indies islands of Grenada, St. Vincent, St. Lucia, Dominica, 
Guadeloupe, Trini- 
dad, Tobago, and 
the Virgin Islands, 
in the island of 
Mauritius, and in 
Uganda, East Africa, 
has found its way 
into the United 
States, is present in 
Florida, and has 
been found infesting 
mango trees on both 
the lower east and 
west coasts of that 
State. 
CHARACTER OF INJURY. 
Injury by the red- 
banded thrips is 
very similar to that 
of the greenhouse 
thrips and of a num- 
ber of other thrips. 
The adults and the 
young may be found 
feeding together on 
the lower surface of 
the foliage, causing 
injury by first pierc- 
ing the surface of 
the leaf with the 
sharp mouth parts, 
then rasping or 
scraping out the leaf 
tissue within and 
leaving a minute 
spot where the chlo- 
Fig. 4.—The red-banded thrips: a, Uninjured leaf; }D, 
leaf badly injured by the feeding of the thrips. 
(Russell, ) 
rophyll or green contents of the leaf has been removed. This spot 
eventually becomes brown. These spots become very abundant and 
after a while run together, forming large brown patches near the 
® Heliothrips rubrocinectus Giard. 
75663 °—22—Bull. 1257 2 
