FALL NUMBER Par 
Male similar to the female, but a little larger. Fore femora greatly en- 
larged and tarsal spines very long, stout, and curved. 
Measurements: Total body length 2.46 mm.; head length 0.48., mm., 
breadth 0.32 mm.; prothorax, length 0.28 mm., breadth 0.38 mm.; 
mesothorax, breadth 0.29 mm.; abdomen, width 0.53.; tube, length 
0.20 mm., width at base 0.09 mm., at apex 0.05 mm. Antennae: 
sepment 1; 62; 2, 72; 3, 157; 4, 107;.5, 96; 6, 86; 7, 52; 8, 48 microns; to- 
tal length 0.67 mm. 
Described from six females and two males obtained by beating ‘oak run- 
ners” (Quercus pumula) near gainesville, Aug. 2. 11919. 
Dolichcthrips gen. nov. 
Head nearly twice as long as wide and longer than the prothorax, sub- 
rectangular in outline, the anterior angles not rounded; sides nearly par- 
allel, somewhat narrowed posteriorly. Mouth cone very short and blunt not 
reaching the middle of the prothorax. Legs rather short. Wings very short 
and feeble. Abdomen exceedingly long and slender. 
Type Cephalothrips elongata Watson. 
The species used as the type of this genus agrees in every particular 
with Uzell’s description of Cephalothrips. But the other species of the 
genus have a short abdomen and the head is rounded in front. It now seems 
undesirable to include a form so diverse in shape of head and abdomen in 
that genus. Hind’s figure of Cephalothrips yuccae does not show the head 
to be rounded in front but all specimens the author has seen show the char- 
acter well. 
The following key will separate the three genera. 
Legs short. Head rounded in front. Anntennal segments all short.— 
Cephalothrips. 
-Legs short. Head square in front. Antennal segments short.—Dolicho- 
thrips. 
Legs long and slender. Head rounded in front. Interdemediate antennal 
segments elongated—Myrmecothrips. 
63. Chirothrips floridenis n. sp. 
Female. General color uniformly light brown. 
Measurements: Total body length 0.9 mm.; head, length 0.11 mm., 
breadth 0.11 mm.; prothorax, median dorsal length 0.12 mm., width in- 
cluding coxae 0.23 mm.; pterothorax, width 0.28 mm.; abdomen, width 0.27 
mm. 
Antennae: y 
Segment [ 2 Per Ree eae ee eee 
eenothe ee ee PAC 23 PAL 23 20 PH 10 | 9 microns 
Seat heresy eee eee 43 40 25 27 21 16 8 | 5 microns 
Total length .155 mm. 
Head about as long as its greatest width (behind the eyes), sides con- 
spicuously swollen behind the eys and slightly so between the eyes and the 
bases of the antenae. Vertex depressed in front, the anterior ocellus sit- 
uated on the margin of the depression and facing forward; no conspicuous 
bristles. Hyes rather large, occupying two-thirds the length of the head, 
