1955] 
Hood — Tylothrips bruesi 
37 
Head (Fig. 1) slightly produced between eyes and an- 
tennae, fully 1.4 times as long as greatest width across 
eyes, this width somewhat greater than that across cheeks 
slightly behind eyes; sides of head incised at posterior 
margin of eyes; cheeks rounded and converging to near 
base, where the least width is about 0.86 the width across 
eyes, serrate as seen from above because of rather heavy 
anastomosing lines; frontal costa with a shallow rounded 
groove ; postocular setae approximately 45 microns long, 
121 microns apart, slightly dilated at tip. Eyes prominent, 
large, protruding, slightly less than one-half the length of 
head, their dorsal length 106 microns. Median ocellus with 
front margin on line with that of eyes. Antennae long and 
slender, about 2.24 times the length of head, their last three 
segments (Fig. 3) not at all united, the pedicels of VII and 
vm not broad ; in somewhat longer than either iv or v 
(Fig. 2), with several very fine, indistinct, transverse lines 
of sculpture on pedicel; major sense-cones long and slender, 
disposed as follows on inner (and outer) surfaces of seg- 
ments: in 1(2), iv 1(2), v 1(1), vi 1(1), vn 1 dorsal; ill 
and IV with several additional minor sense-cones; major 
antennal setae long and pointed, those associated with the 
major sense-cones about equal to them in length. Mouth- 
cone short, nearly semicircularly rounded at tip, extending 
about 70 microns beyond posterior dorsal margin of head. 
Prothorax (Fig. 1), along median line of pronotum, 
about 0.63 the length of head and one-half the width across 
fore coxae, its surface nearly smooth but with a few faint 
lines of sculpture near posterior margin ; posterior half 
of epimera fused with pronotum ; antero-marginal setae 
very minute, the ether usual setae long, moderately heavy, 
and very slightly widened at tip, the antero-angulars and 
midlaterals about 73 microns, epimerals and postero-mar- 
ginals 87-91, coxals about 33. Pterothorax rather long, 
wider than prothorax across coxae; metanotal plate in 
basal half, shield-shaped and roundly elevated, its posterior 
part without distinct foveae at sides, the single pair of 
major setae pointed, 43 microns long and 78 microns apart. 
Legs moderately long and slender, the fore tibiae (Fig. 1) 
with several strong tubercles from each of which arises a 
