220m. THE FLORIDA ENTOMOLOGIST 
slightly protuding, sparsely pilose, facets large . Ocelli large, posterior 
pair situated opposite and near the posterior margins of the eyes. Mouth 
Cone short, its length little more than half its width at the base, apex well 
rounded. Antennae but little longer than the head, basal segment rounded 
and very large, 1.6 times as wide as long, darker than the head. Segment 
3 conspicuously pedicellate. Sense cones on segments 3 and 4 colorless but 
exceedingly thick and heavy; bristles short, pale, and inconspicuous. 
Prothorax trapezoidal; sides straight and sharply diverging posteriorly, 
one moderately heavy spine at each posterior angle. 
Pterothorax somewhat wider than the prothorax, sides bulging. Wings 
long and narrow, projecting beyond the tip of the abdomen; fore pair 
curved, light brown except for a clear area above the base, surface sparsely 
covered with very minute hairs; the anterior longitudinal vein bears three 
bristles, one near the middle and the others midway between it and the 
base and apex respectively; the posterior vein bears six small spines near 
the base; scale with a pair of heavy bristles near the apex, a smaller one 
near the base and three along the distal margin. Hind wings light gray. 
Legs short, fore femora enlarged, .7 as wide as long; all femora and tibiae 
brown, tarsi yellowish brown. 
Abdomen short and thick, margins of segments almost black, producing 
distant transverse bands, bristles on the last two segments rather long. 
Described from a single female taken by sweeping Bermuda grass at Sea- 
breeze, Fla., Aug. 24, 1919, and several at Moor Haven June 1920. Type in 
the author’s collection. 
Male unknown. 
In the shape of the head and thorax and in the presence of but one spine 
at each posterior angle of the prothorax, this species approaches nearest to 
C. mexicana; but in its wing characters it agrees with other species of the 
genus. 
KEY TO NORTH AMERICAN SPECIES OF CHIROTHRIPS 
1. A single median longitudinal vein in each fore wing. 
C. mexicanus Crawf. 
2. Two longitudinal veins in each fore wing; fore wings brown. 
a. Two stout spines at each posterior angle of prothorax. 
b. Antennal segment 6 longer than 4 and 5 together. 
C. insolitus Hood. 
bb. - Segment 6 shorter than 4 and 5 together. C. manicatus Holiday. 
aa. A single stout spine at each posterior angle. C floridensis n. sp. 
aaa. Without stout spines at the posterior angles of prothorax. 
b. Abdomen usually yellow. 
e. Thorax yellowish brown. 
d. Vertex with only two pairs of prominent bristles. Length 
about .8 mm. Prothorax 1.3 as long as the head. 
C. obesus Hinds. 
dd. Vertex with 9 pairs of prominent bristles. Length about 
1.1 mm. Prothorax 2.7 as long as head. 
C. spiniceps Hood. 
