XII. 
ANNALES MUSEI NAT ION ALIS HUNGARICL 
1914, 
MYRMECOSEPSI8, 
A NEW GENUS OF DIPTERA WITH VERY REDUCED WINGS. 
By Dr. K. Kertész. 
(With 2 figures.) 
Myrmecosepsis n. g. 
Head relatively large, broader than the thorax, transverse elliptical, 
shorter than broad (19 : 25). Frons in both sexes almost half as broad as 
the head (12 : 25), slightly convex, with parallel sides, hardly prominent. 
The frontal triangle broad, well distinguished from the orbits by its shin¬ 
ingness. The orbits of the frontal stripe are very narrow at the vertex 
but always become broader in front and are narrowly connected above 
Fig. 1. Myrmecosepsis hystrix n. g., n. sp. cf enlarged. 
the antennæ so that the frontal triangle ends anteriorly with a distinct 
rounded margin. The head is in profile almost circular but a little longer 
than high (19 : 17), the eyes short elliptical somewhat transverse, the 
anterior edge convex, the posterior nearly straight. Face a little concave with 
a shallow central ridge. Vibrissal angles distinct with one or two bristles. 
Jowls small V12 the height h of the eyes, the lower margin straight with 
short bristles on its edge pointing forwards. Back of the head well puffed 
out. Ocelli in an equilateral triangle. Antennæ short, the first joint cup¬ 
like, the second hardly half as long as the first, the third seen from the 
side álmost circular with a basal, shortly pubescent, arista, thickened 
