70 THE FLORIDA BUGGIST 
24. Bregmatothrips gracilis Hood & Williams (715). 
Orlando, Nov. 5 and 8, 1914, C. B. Williams, collector. 
25. Pseudothrips inequalis Beach (’96). (Redescribed by Hinds, ’02, p. 
146.) 
Quincy, May 17, 1910, on Senecio. (Morgan, 13.) 
Gainesville, Nov. 19138, on wild Begonia. 
Extends north to Maryland and Iowa. 
26. Heterothrips ariswemae, Hood. THE INDIAN-TURNIP THRIPS. 
Quincy, March 1909, on honeysuckle and Rhodendron ulmiflorum, 
H. F. Wilson, collector. (Morgan, ’13.) 
Extends north to Virginia and Illinois. 
27. Heterothrips aesculi Watson (715). THE BUCKEYE THRIPS. 
Gainesville, Mar. 1914, April 1915, in blossoms of Aesculus pavia. 
Very common in blossoms of this plant. 
KEY TO NORTH AMERICAN SPECIES OF HETEROTHRIPS 
J. Prothorax twice as long as the head; antennae with apparently nine 
segments. 
a. Antennae without circles of distal sensoria on segment 4. 
b. Segment 3 hght yellow, palest at the base; segment 4 
brownish, palest toward the base; articulations of seg- 
ments brown, not clear; wings brown, paler at base. An- 
terior femora shading to yellow at apex; fore tibiae yellow, 
shaded with brown laterally; tarsi yellow....H. salicis Shull. 
bb. Segment 3 yellow with white bands; segment 4 yellow to 
brown, lightest at the apex; some articulations brown, 
others clear; wings brown with a broad white band near 
the base. Anterior femora shading to brownish yellow at 
the apex; fore tibiae brownish yellow; tarsi brownish yel- 
TOW ae es ene ee Sa nee H. aesculi Watson. 
aa. Antennae with distal circles on segment 4; segments 1 and 2 
slightly lighter than the body, shaded laterally with black; seg- 
ment 3 hght yellow, with a narrow sub-basal white band; distal 
third shaded with brown; segments 4-9 uniform light blackish 
brown except band of sensoria on segment 4. Wings blackish 
brown with a broad white band near the base. Legs concolorous 
with the body except tarsi and distal part of fore tibias which 
arenyelloW.. ...5:-.45. 0s ee ee H. arisaemae Hood. 
II. Prothorax less than twice as long as head. 
a. Antennae with apparently ten segments; circles of sense areas on 
segments 4 and 5 (corresponding to segments 3 and 4 of other 
species of Heterothrips) light yellow; all others dark brown. 
Wings light brown, basal one-sixth clear. H. decacornis Crawford. 
aa. Antennae with nine segments. 
b. Posterior margins of abdominal tergites not fringed with 
scales. 
ec. Abdomen not pubescent ................ H. borinquen Hood. . 
