1925 ] Myrmecophilous Phoridce from the N eotropical Region 309 
the abdomen beset with a large number of bristly hairs arranged 
in transverse rows. It differs also in having a lateral pair of well 
developed frontal bristles in addition to those present in the 
type species and also has the full number of mesonotal bristles. 
There are no wings in either of the two specimens, but as 
the wings of some of these forms are very readily deciduous, it is 
impossible to be positive that wings may not have been present. 
In the species described on an earlier page as Ecitomyia spinosa 
some specimens had lost either one or both wings. As the at- 
tachment of the veistigial wing, in this form at least, appears to 
be very feeble and as microscopical examination does not readily 
disclose any indication of a rupture of the cuticle, I cannot feel 
perfectly satisfied on this point. 
Ecituncula setosa sp. nov. (Fig. 2). 
$ . Length 1.0-1. 3 mm., dependent upon the stenogastric 
or physogastric condition. Head, metathorax and basal ab- 
dominal plate dark brownish; antennae and legs pale testaceous; 
abdominal membrane pale yellowish white. Head, seen from 
above, more than twice as wide as long; rounded at the sides and 
sharply rounded medially in front. Eyes small, about half the 
diameter of the antenna, with contiguous facets. Four post- 
antennal bristles near the anterior margin of the front, the upper 
pair farther apart than the lower one; middle frontal row con- 
sisting of four long bristles forming a pair rather close to each 
eye, the inner one of each pair much higher than the lateral one; 
ocellar row of four, the median ones nearer to each other than to 
the adjacent lateral one. Ocelli absent. Palpi of the usual form, 
with about five strong bristles along the margin. Antennse oval, 
slightly acute apically, very densely pubescent; arista very 
short and thick, composed of three very distinct segments. Meso- 
thorax about twice as broad as long, the sides rounded, slightly 
angulate just in front of the middle; with a large stout bristle 
close to each lateral angle and a transverse series of six across the 
middle of the disc. No trace of wings, although there is a small 
impression at each posterior angle of the mesothorax at the 
point where strap-shaped wings are attached in forms where 
