20 THE FLORIDA ENTOMOLOGIST 
aaa. Segment 3 about equal to 1 and 2 together, all segments yellow 
except 1 and base of 2. Antennae 1 two-thirds as long as head. 
H. flavoantennis (Watson) 
Myrmecothrips gen. nov. 
Head subglobose, well rounded in front and much contracted posteriorly, 
much larger than the prothorax, eyes small. Antennal segments, especially 
the intermediate ones, all much longer than wide. Mouth cone shorter than 
its breadth at the base, reaching more than half way across the prothorax. 
Legs long and slender; fore femora slightly thickened in the females, much 
enlarged in the males; fore tarsi with a short, blunt tooth in the females. 
A large long one in the males. Wings wanting. Abdomen short and thick. 
Type Myrmecothrips querci n. sp. 
This genus agrees with Uzell’s description of Cephalothrips in all char- 
acters except the long legs. However, in all other described species of 
Cephalothrips the antennal segments are moniliform and it seems undesir- 
able to stretch Uzell’s description to cover a form so diverse in shape of 
head and antennae. Named from its resemblance to an ant. 
62. Myrmecothrips querci n. sp. 
Female. General color brown, abdomen black with large white spots on 
the outer edges of segments 1, 3 and 4. Head dark brown; prothorax a 
lighter brown, and metathorax lighter still with a yellow area on the pos- 
terior part; legs brown. Antennal segments 1 and 2 light yellow, others 
dark brown. 
Measurements: Total body length 2.22 mm.; head, length 0.45 mm.; 
breadth 0.36 mm.; prothorax, length 0.31 mm., breadth 0.33.; mesothorax, 
breadth 0.29 mm.; abdomen, breadth 0.52 mm.; tube,length 0.19 mm.,breadth 
at base 0.09 mm., at apex 0.06 mm. Antennae: Segment 1, 52; 2, 62; 3, 148; 
4, 119; 5, 96; 6, 90; 7, 52; 8, 46 microns; total 0.67 mm. 
Head subglobose, only a little longer than wide, rounded in front; cheeks 
arched and strongly converging posteriorly to a neck whose diameter is only 
.6 that of the greatest diameter of the head, which is directly behind the 
post-ocular bristles; post-ocular bristles short (.05 mm.); a little longer 
bristle in front of each eye; both light brown and dilated at the tip into a 
large colorless head. Eyes small with a few facets. 
Antennae 8-segmented; spines few and pale; sense cones short . Mouth 
cone reaching about .6 distance across prosternum. 
Prothorax also subglobose; rounded posteriorly; with a deep constriction 
near the middle of each side; covering only the basal half of each coxa; 
each posterior angle and each coxa provided with a capitate bristle. Legs 
long and slender, nearly uniformly dark brown; fore femora considerably 
enlarged near the base, provided with a few knobbed bristles. Fore tibiae 
with an especially stout but rather short bristle on the inner side near the 
end. Fore tarsi with a short tooth; middle and hind tibiae with a row of 
about 8 stiff, pointed bristles along the inner side, the terminal one and 
another on the outer side longer than the tarsi. 
Abdomen short and thick, abruptly rounded behind the seventh segment. 
On side of segment 1 there is an elongated, pearly white area, on segment 
3 a similar small round one, and on segment 4 a larger round spot. The 
posterior segments bear modestly long, light brown sharp-pointed bris- 
tles. Tube short and thick with a terminal ring of 15 bristles, 8 of which 
are about as long as the tube. 
