. 188 
Length of ovipositor, visible part 0.26 mm. 
Total length of ovipositor 0,78 mm. 
Male like female. Aedeagus is produced to an extent 
of 0,13 mm (refer besides to Silvestri's drawings). 
This species is easily distinguished from C. Silvestrii 
in colour, in comparatively greater length of 2nd suba- 
nellus, in large width of stigma, in the length of the vi- 
sible part of the ovipositor which is produced to an ex- 
tent of 4 of its total length, whereas in C. Silvestrü it is 
always produced at least to an extent of half part of its 
total length. 
Bred from hazel in May. Is also probably parasitic 
on eggs of Hemiptera. 
4. C. Walkeri Forster. 
1856 Centrobia Walkeri Förster. Hym. Stud. II, p. 87. 
1918 Centrobia Walkeri Kryger. Entom. Meddel. XII, p. 289. 
Description and drawings see Kryger |. c. 
Oligosita Engelharti Kryger. 
1918 Oligosita Engelharti Kryger. Entom. Meddel. XII p. 327. 
On July 23rd 1919 a female of this species was found 
in Dyrehaven; of the species was formerly only known 
one specimen, also a female, captured in Vestergade in 
Copenhagen. The fact of the former capture being made 
at the glade next to Fortunen in Dyrehaven, indicates 
the correctness of my supposition, formerly expressed, 
that the capturing of this species at Copenhagen being 
accidental. 
Brachista nigra Kryger. 
1918 Brachista nigra Kryger. Entom. Meddel. XII, p. 335. 
For this species, which was described by me, the date 
of capture is stated to be 26th and 27th August; this is 
however a misprint, the correct date is 26th and 27th July. 
Gentofte, 5/, 1920. 
