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again longer than fifth. Q antennæ with fourth, fifth and 
sixth clavus joints almost of equal length, the sixth ho- 
wever a fraction longer than the two others; scape narrow, 
pedicellus broader pearlformed, annellus and first clavus 
joint very small, clavus strongly covered with long hairs, 
mostly in the male. 
Anterior wings broad powerful, sub-costa and marginal 
vein short almost of equal length; radius short, stigma 
before the center line of wing. A part of marginal vein, 
radius and stigma deep black. These dark markings 
making so sharp an impression on the eye, that it can 
be well said to characterise the species; fringe short; sur- 
face of wing with about ten clear rows of hairs with 
single spread hairs between. Posterior wings long, 
swordshaped with two rows of hairs on surface, anterior 
fringe very small, posterior long, longer than fringe on 
anterior wings. Genitalia of male short, hardly produced 
beyond apex of abdomen. Ovipositor and sheaths pro- 
duced far beyond apex of abdomen, to an extend of one 
third of length of abdomen, saw with five teeth. 
Eyes dark red, ocelli red. 
Length: Male 0.70 mm, female 0.78—0.96 mm. 
Denmark. Generally distributed in North Sealand: 
Pr&stevang, Ryget, Ermelund, Nyvang etc. etc. Swept from 
birch, and bred from rolled leaves of Rhynchites betule 
on birch and alder. 
Specimens in Zoological Museum Copenhagen. 
If in the early days of June, small birches, where 
Rhynchites betule has commenced to make rolled leaves 
for its larve, are swept with a sweeping-net, it ist almost 
impossible to avoid finding this species, which is very 
common everywhere where birch and alder are found in 
North Sealand. I have. bred this species many times 
besides having swept it in many other cases. 
Below are given the results of a single breeding of 
1200 rolled birch leaves with Rhynchites betule eggs, 
collected at Pr&stevangen °/,. 
