17,2 Karny: Thysanoptera from the Philippines 209 
The new species is to be recognized as a true Dicaiothrips 
by the strong sickle-shaped bristle of the fore femora and dif- 
fers from the other known species by the coloration of the 
antennae. There was only a single idolothripid species hitherto 
known from the Philippine Islands, Idolothrips (?) tibialis 
Ashmead, of doubtful generic position, which is much smaller 
and has all the tibiae paler, yellowish. Dicaiothrips bakeri be- 
longs to the group with equal third and fourth antennal seg- 
ments and seems to be closely related to D. levis Schmutz, from 
Ceylon ; but this species has the antennae differently colored and 
a stouter tuberculated tooth on the fore tarsi of the male. Di- 
caiothrips denticollis Bagnall agrees with bakeri by the colora- 
tion of the antennae, but differs by the toothlike process of 
the prothoracic margins and by its larger size. Dicaiothrips 
bruneitarsis Schmutz has the middle joints of antennae paler 
and the fore femora of male much smaller than in bakeri. 
Dicaiothrips procer Schmutz differs by its larger size, its shorter 
vertex, and the coloration of antennae. Dicaiothrips greeni Bag- 
nall has a longer, anteriorly more produced head; light brown 
middle joints of antennae, of which the fourth is distinctly shorter 
than the third ; paler middle and hind tibiae ; and differs further 
by its much larger size. Dicaiothrips dallatorrensis Schmutz 
and novus Schmutz have different coloration of antennae, and 
the anteocular process of dallatorrensis is a little shorter than 
in bakeri. Dicaiothrips proximus Bagnall, from Ceylon, is also 
closely related to bakeri, but a little longer and stouter, and 
has not only the third, but also the basal part of the fourth 
and the fifth antennal joints yellowish. Dicaiothrips bouvieri 
Vuillet is about twice as long as bakeri, has longer antennae, a 
more strongly produced vertex, a longer and slenderer fore 
tarsal tooth, and paler, yellowish, middle and hind tibiae; the 
third and fourth antennal joints are equal, as in bakeri, while 
the neotropical species have the fourth distinctly shorter. 
Palawan, Puerto Princesa (leg. Baker), 1 male. 
