NEW JAVANESE GALL MIDGES 
by 
IE, 18% JERIBIETT 
Albany, N.Y. U.S.A. 
The following descriptions are based upon a small collection of insects 
kindly submitted for study by Dr. W. DOCTERS VAN LEEUWEN, Director 
of the Botanical Gardens, Buitenzorg, Java, under date of July 15, 1920. 
The collection is of special interest since it has brought to light a very 
interesting new genus and has given additional data respecting the habits 
of the oriental Orseoliella, a genus which breeds in several grasses. 
It should be noted in this connection that many of the gall midges 
were forwarded in some preserving fluid which apparently affected the 
circumfila in such a way that the ordinary processes of mounting in balsam 
resulted in their disappearance, and therefore, made it very difficult to be 
positive in regard to these structures. 
Thorodiplosis n.g._ 
This genus is tentatively placed in the Bifili though further study may 
show that it belongs in the Trifili. It may be easily distinguished from 
all other known genera by the very long, narrow wings, the produced 
antennae, the simple claws with an almost right angled curve, and the 
short lobed ovipositor, type 7. impatientis n. sp. 
In the Bifili, this genus runs to Thurauia from which it is easily 
separated by the short, non-chitinized ovipositor. The tendency toward 
small, cyclindrical antennal segments distally in the male suggests an affinity 
with Prodiplosis FELT and it is possible that the genus will ultimately be placed 
in this series. Unfortunately the two males have been so manipulated that 
it is impossible to refer the genus to one or the other of these sub-tribes. 
Thorodiplosis impatientis n. sp. 
The minute midges were received from W. DOCTERS v. LEEUWEN 
under date of July 15th, 1920 and labelled 21, Impatiens platypetala Lindl. 
Tjibodas, Mount Gedeh, 1500 m. Bull. Jard. Bot. Buitenzorg series III, 
volume 1, page 49, No. 599. An illustration of the gall shows it to be 
a marginal leaf roll on the upper surface. (Fig. 599). 
