1923 ] Notes on Some Genera of Myrmecophilous Phoridce 
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absent. Proboscis short, stout, heavily chitinized and porrect. 
Thorax very short on its dorsal surface (as indicated by a pair of 
humeral and posterior-lateral macrochsetse) but when the abdomen 
is bent down, exposing the posterior slope, it is seen to be nearly 
as long as the head. Abdomen large, ovate, fully twice as wide 
as the head and broadest at the third segment behind which it 
tapers obliquely; second to fifth segments each with a row of six 
long, but not very stout bristles extending across the disc near 
the middle; sixth with a denser fringe along the margin; sides 
of all the segments each with several additional bristles. First 
six segements heavily chitinized, without any membranous bord- 
ers; following three segments tubular. Abdomen above moder- 
ately convex, below flat, so that in cross-section it is very 
strongly depressed. Legs rather short and stout; four posterior 
tibiae ciliate on the edge. 
Type : T. manni sp. nov. 
This insect is quite unique and I cannot place it in any of the 
described genera in spite of the fact that these are already very 
numerous. There is no indication of any gland opening on the 
fifth abdominal segment and the abdomen is heavily chitinized 
over its entire dorsal surface. It resembles Chonocephalus 
Wandolleck, but the form of the abdomen is very different, the 
palpi are very densely bristled, and both the cephalic and 
thoracic chsetotoxy disagree. Chonocephalus, also, so far as is 
known, is not myrmecophilous. 
Tranopeltoxenus manni sp. nov. (Fig. 1). 
9 . Length 1.5 mm. Head and its appendages, thorax and 
legs, pale yellow; first five abdominal segments black or piceous, 
the sixth segment fuscous, the extrusible ones beyond whitish. 
Head above covered with sparse, appressed black hairs and at 
the sides anteriorly below the antennae with a row of bristly 
hairs. Bristles of palpi dense, as long as the width of the palpus. 
Antennae rather small, the arista but little longer than the 
diameter of the third joint. Post-antennal bristles rather stout, 
parallel, proclinate; inner bristles of lower frontal row rather 
