174 Transactions. 
The Dimera contain only three families—the Caeciliidae, Psocidae, and 
Thyrsophoridae. Only the first of these three is known in New Zealand. 
It is worthy of remark that, though the Psocidae are the dominant family 
in the Northern Hemisphere, and are abundant in Australia, not a 
single introduced species of this family has so far been noted for New 
Zealand. 
Psocoptera are by no means uncommon, and at least two native species . 
have spread to orchards and gardens, where they may be found in great 
abundance, feeding upon fungoid growths. As a result of two or three 
months’ collecting in a few localities only I have been able to bring to light 
a considerable number of new species. Specimens have also been received 
from Messrs. H. Hamilton and J. G. Myers, of Wellington ; W. G. Howes, 
that purpose. 
In the keys which follow I propose to give only those families and 
genera found in New Zealand, with the addition of the family Psocidae, 
so that introduced species belonging to that family may be recognized 
if any happen to be discovered later on. 
KEY TO THE FAMILIES OF PSOCOPTERA FOUND IN NEW ZEALAND, WITH THE 
ADDITION OF THE PSOCIDAE. 
[+ three-jointed in imago, two-jointed in larva. Suborder 
RIM 
ERA... 25 е s 3 үз 2 
Tarsi two-jointed in both imago and larva. Suborder DIMERA 6 
. {Meso- and meta-thorax completely fused together; imago 
2 absolutely without win 22 > а .. 'TROCTIDAE. 
Meso- and meta-thorax separate; imago only very rarely wingless 3 
Imago wingless, or 58; 
3 prothorax strongly developed, larger than mesothorax .. ATROPIDAE. 
Imago winged, prothorax much smaller than mesothorax ar 4 
Wings with abnormal venation ; Cu, and 1A in forewing not 
ending up together; body and wings both scaly and hairy ; 
44. antennae with more than 13 joints us Ps .. LEPIDOMIOUN 
[n with normal venation ; Cus and 1A in orewing ending u 
_ogether; no scales оп body or wings; antennae with 13 joints 5 
f Cubital loop of forewing not touching M above i = .. Mosorsocnam 
5 \ Cubital loop of forewing either just touching M or fusing with 
"cup ога short distance... pe fm .. MYormocmAM 
ubital loop of forewing absent, or, if present, n t touching or 
ec h M above it E duas CARCILIEDAN 
) bov 
a cross-vein, or just to М, it 3 
Чечин лә ] э vens . or = "18 M i a Кә idi 
