WINTER NUMBER 99 
ee. Last two antennal segments not compactly 
united; eyes normal; body length 1.8 mm. 
or more. 
f. Tarsal tooth straight. 
T. marginalis Hood & Williams. 
ff. Tarsal tooth curved. 
T. terminalis Hood & Williams. 
lojoy. > ARS RSNV EOFS ete aVe0 beeen SE ee T. zonatus Hood. 
MEGALOMEROTHRIPS, gen. nov. 
Head considerably longer than wide; cheeks with a few stout bristles but 
without warts; antennae about twice as long as the head, 8-segmented, inter- 
mediate segments elongated. Mouth cone about as long as width at the base 
which is swollen to a diameter considerably greater than the width of the 
head; labium rounded but labrum sharp-pointed, reaching nearly to the 
mesosternum; fore femora enlarged, without teeth; tarsi without teeth. 
Wings short and weak, not narrowed in the middle. Tube long and slender. 
Type M. eupatorii n. sp. 
54. Megalomerothrips eupatoru, n. sp. 
Measurements: Total length 2.1 mm.; Head, length 0.31 mm.; width 
0.23 mm.; Prothorax, length 0.24 mm, width (including coaxe) 0.43 mm.; 
mesothorax, breadth 0.40 mm.; abdomen, breadth 0.46 mm.; tube, length 
0.34 mm., width in the middle 0.08 mm. Antennae: segment 1, 59; 2, 68; 
3, 148; 4, 118; 5, 88; 6, 71; 7, 58; 8, 48 microns; total 0.62 mm. 
Color an almost uniform light brown; posterior segments of abdomen 
darker and segments 2 and 3 of antennae very light yellow, 3 almost color- 
less as are the last tarsal joints. 
Head subquadrangular in outline, about 1%% longer than wide; frons but 
slightly convex; cheeks nearly parallel, but slightly convex, provided with 
a few short thick spines; post-ocular bristles rather long, exceeding the 
eyes; dorsal surface of head with faint cross-striations. Eyes rather small, 
not protruding, black. Ocelli prominent, all facing upward; posterior pair 
opposite the middle of the eyes but not touching their margins. Mouth cone 
about as wide as the width at the swollen base, labrum tapering to a point, 
exceeding the labium and nearly reaching the mesosternum. Antennae 8- 
segmented; segment 3 long and almost colorless; sense cones and bristles 
colorless and inconspicuous. 
Prothorax shorter than the head; wide; sides sharply diverging posteriorly 
and very convex; posterior angles very rounding, provided with moderately 
long but colorless spines with blunt tips. 
Pterothorax; sides nearly straight, converging posteriorly; a pair of 
stout short spines about the middle of the mesothorax. Legs moderately 
long, concolorous with the body except for the colorless last joints of the 
tarsi. Fore femora greatly enlarged, % as wide as the head. Wings very 
short and weak, not nearly reching the base of the tube; fringed with rather 
short hairs, about 20 interlocated ones. 
Abdomen elliptical in outline, no bristles on anterior segments but heavy 
ones on the posterior ones, the longest exceeding the tube. Tube longer 
than the head, narrow with almost parallel sides, tipped with a few spines 
which are only slightly more than half the length of the tube. 
é unknown. 
