316 
enough no disputes seem to have arisen as to this genus, 
it has easily been recognised by all the authors who have 
had the species for description, and neither does it cause 
the slightest difficulty to come to the correct result by 
help of Försters, Schmiedeknechts, Ashmeads and Wolffs 
tables. 
However, although it may thus cause no difficulty to 
determine the genus Oligosita, I am of the opinion that there 
can be difficulty enough to get all the species I have found to 
agree withthe diagnosis ofthe genus if itisto be taken quite 
literally. Taking as an example, Forster states: Hairs on 
wings not placed in rows, so that it will easily be un- 
derstood by looking at my figure of Oligosita pallida 
that if it is to be followed as it stands the Oligosita pal- 
lida comes under the first group: Hairs on wings in 
rows (Trichogram.). Nevertheless there can be no question of 
doubt, that all the species I have referred to this genus really 
belong to Oligosita as they resemble each other so con- 
siderably, and therefore I have endeavoured in my table 
of the genera to avoid too much regard being placed to 
the fact that a species with the hairs on wings in rows 
absolutely must belong to group I. 
Description of genus: 
The species are on an average long and slender in- 
sects most often of yellow or brown colours. Antenne 
7 jointed: scape, pedicellus, 1 anellus, 1 funiculus and 3 
jointed club. In the females the ultimate joint is provi- 
ded with very marked sense-organs, more marked than in 
the male. Eyes and ocelli black. Wings on an average 
long and narrow, the surface provided with hairs on the 
external half only and only sparingly; the hairs on the 
disc of the wings not without a certain degree of re- 
gularity. Ciliae very long and robust. The wing muscles 
extend far into the abdomen. Sexual organs as a rule 
not visible from above. The sexes can best be determined 
by examination of the underside of the abdomen or of 
the antenne. 
