WINTER NUMBER 53 
TWO NEW THYSANOPTERA FROM CUBA 
J. R. WATSON 
CEPHALOTHRIPS MERRILL N. SP. 
Measurements—Total body length 0.87 mm. Head, length 0.14 mm, width 
0.11 mm; prothorax, length 0.10 mm, width (including coxae) 0.18 mm; 
pterothorax, width 0.177; abdomen, greatest width 0.16 mm; tube, lengti 
0.08 mm, width at base 0.055 mm, at apex 0.025 mm; Antennae, total 
length 0.25 mm. 
Segment bo Sr pipet a See ig | 2 | a | 4 | 5 | 6 | th. | = 8 ae 
emer te, ee, 18h e36 | 40 | AIG |FA0G 35223 te Oe 
WN alee ere eee ee 200 | 29. | 2d 822) | 227 297] it microns: 
Color an almost uniform light olive gray (Ridgeway’s color standard) ; 
head and tip of abdomen darker, antennal segment 3 and all tibiae and 
tarsi lighter except a black spot near the tips of tarsi; eyes and ocellar 
crescents deep red and very conspicuous. Head a little longer than wide, 
broadly rounded in front except for a projection of the vertex between 
the basal segments of the antennae; cheeks gently arched, slightly con- 
verging posteriorly, vertex smooth without bristles except the rather long 
(about as long as the eyes) but very slender, pointed post-oculars and 
two pairs of minute ones along the margins of the eyes, one directly be- 
hind and one in front of each posterior ocellus. Hyes rather small, not 
protruding, non pilose. Ocelli large, the posterior pair situated opposite 
the anterior third of the eyes, the anterior directed forward. Mouth cone 
short, reaching the middle of the prosternum, and rounded at the tip. 
Antennae nearly twice as long as the head. Segment 2 short barrel-shaped 
with a broad peduncle; 3, top-shaped; 4, obovate; 5, oval; 6, cylindrical; 
7, cylindrical but tapering somewhat apically; 8, conical, broadly united to 
- |; 8-6 with short narrow pedicels, 8 with a somewhat broader one: 1, 
concolorous with the head; 2, lighter at apex; 38, much lighter except ex- 
treme base (but pedicel light); 4, about concolorous with the head; 5-8, 
darker, deep olive gray. Bristles and sense cones short, pale and incon- 
spicuous. 
Prothorax, somewhat wider than the head, shorter than the head; sides 
rather sharply diverging posteriorly. A rather long but pale bristle on 
each posterior angle, an equally long one midway between this and the 
median dorsal line. A pair of minute ones near middle of posterior margin. 
Pterothorax at the anterior margin about as wide as the prothorax (in- 
cluding coxae) but sides converge sharply posteriorly. Wing membrane 
pale gray, constricted in the middle, reaching to about the 8th abdominal 
segment, sparsely provided with rather long hairs, 4 inter-located ones. 
Legs rather short. Fore femora considerably enlarged. Fore tarsi un- 
armed. 
Abdomen rather slender, sides nearly parallel to about 8th segment then 
tapering abruptly to tube. Bristles rather short, pale and inconspicuous; 
those on the last segment larger. Terminal ones but little longer than the 
tube. 
Described from a single male taken from a scale-infested cocoanut from 
Cuba by George B. Merrill of the Florida State Plant Board. 
The color of this insect and the shape of the pterothorax, will enable 
it to be readily told from the other two species of this genus. 
