204 The Philippine Journal of Science 1920 
the under surface of the first joint two additional subglobular 
joints are laterally inserted, forming a short, thick, styliform 
process (fig. 1). These two additional joints are blackish and 
have a few setiform hairs. The right antenna of this specimen 
has the normal form. 
The whole surface of the fore femur is covered with a num- 
ber of spine-bearing pits, as in certain Idolothripidse. The 
fore tarsus is armed with a strong tooth, which in the male is 
subcylindrical and slender, about as long as the tarsus is broad ; 
in the female, triangular and hardly as long as half of the 
tarsal breadth. The intermediate femora bear before the mid- 
dle — as Bagnall has already pointed out — a forwardly directed 
tubercle; but it is very variable in form and size and seems in 
some specimens to be entirely absent. The anterior angles of 
Fig. 1. Head of Dinothrips sumatrensis, female, with anomalous left antenna. 
the mesonotum are in the male armed with a peculiar bifurcate 
appendage; in some females, with a small tooth, but usually 
without it and entirely unarmed. 
The coloration of the fore wings is very characteristic. There 
is near the base close to the fore margin a cloudy dark spot 
and after it a median, longitudinal, dark brown stripe, which 
is dilated in the middle of the wing to a smoky, distally evanes- 
cent patch. On the hind margin there are about seventy du- 
plicated cilise. 
Dinothrips monodon sp. nov. Fig. 2. 
Dark brownish black. Coloration of antennae as in suma- 
trensis. Head about twice as long as broad, its greatest width 
in the basal third. Mouth cone rounded at the end, reaching 
about half the length of prosternum. Postocular bristles and 
