136 
Psyche 
[December 
It would seem probable that the species is termitophilous as 
such is known to be the case among some other species of 
the genus. 
In spite of the numerous species, several of which are 
termitophilous, that have been described from the Ameri- 
can tropics, this species is undoubtedly undescribed. From 
several forms that are similar, it is distinguished as fol- 
lows : from D. knabi Malloch by the shorter first section of 
the costa which is 2% times as long as the other together, 
instead of 5 times, and by the nearly straight middle trans- 
verse row of frontal bristles; from D. obscuriventris 
Borgm. by its entirely black color ; from D. intrusa Borgm. 
by the presence of 5 abdominal tergites and the black hal- 
ter es (although there is a disagreement here between the 
original description and a subsequent key to species) ; from 
D. anter odor sails Schm. by the longer first section of the 
costa. 
Megaselia juli Brues 
Three specimens collected in the act of attacking and 
ovipositing in a large millipede and one later reared from 
the same host; Trinidad, Dec. 19, 1928 and Jan. 4, 1929. 
These specimens seem to be indistinguishable from the 
North American Megaselia ( Aphiochxta) juli Brues in spite 
of the widely separated localities. A South American spe- 
cies, M. mucronata Borgmeier from Petropolis near Rio de 
Janiero is very similar, but differs in its much longer ovi- 
positor and more nearly equal first and second constal di- 
visions in the wing. 
The ovipositor shows the same striation on both the api- 
cal and basal sections as Borgmeier has described and fig- 
ured for M. mucronata (Arch. Mus. Nac. Rio de Janeiro, 
vol. 35, 142 (1925). 
In both M. juli and M. mucronata the mesopleura has one 
strong macrochseta in addition to minute hairs. An Euro- 
pean species M. styloprocta Schmitz has the body black and 
the mesopleural hairs all minute, although otherwise very 
similar. 
Cremersia Schmitz 
There is a species of this peculiar genus in the collection. 
