XL 
ANNALES MÜSEI NATIONALE HUNGARICI. 
1913 
A NEW SPECIES OF THE DIPTEKOUS GENUS 
CHONDEOMETOPÜM HEND. 
By Dr. K. Kertész. 
(With 1 figure.) 
Chondrometopum bifenestratum n. sp. 5 . 
Face and jowls dull white; frons and lunula reddishbrown weakly 
granulated bearing a peculiar rather long blackish pubescence, the back 
of the head darker reddishbrown, near the eyes greyish. Antennae 
reddishbrown. Prælabrum very small, proboscis brown, palpi black. 
Thorax dark grey dull, pleurae darker and more shining. Scutellum 
brownish. Abdomen dull 
black, covered with thick grey 
tomentum leaving numerous 
(often coalescent) spots ol 
the ground colour. Ovipositor 
reddishbrown, the second 
joint blackishbrown. Legs 
Wing of Chondrometopum bifenestratum n. sp. $ . darkbrown, tibiae and tarsi 
of the hind legs paler, those 
of the front and middle ones yellowish. Wings transparent; the basal 
half above the fourth longitudinal vein and a short branch on the same 
vein beyond the small cross-vein black, with two elliptical hyaline spots, 
one in the submarginal, the other in the upper basal cell, and two 
triangular hyaline spots on the anterior wingmargin, while the lower 
end of the discal cross-vein is margined by a very minute hyaline 
spot ; the two other branches of the black basal markings run the one 
along the anterior wingmargin like a narrow arched band to the tip 
of wing finishing just beyond the discal vein, the other as a narrow 
crossband starting just below the second longitudinal vein and including 
the postical cross-vein. Halteres lemon yellow. 
Length with the first joint of the ovipositor 5 mm., wings 4*5 mm. 
One female from Columbia (Aracataca, II. 1912) nought by Mr. 
J. Újhelyi. 
This species differs from Ch. arcuatum Hend., the only known 
species of this genus, by the smoother frons, the colour of the abdomen, 
and especially by the differently shaped wing-markings. 
