180 Transactions. 
e finding of this remarkable archaic Psocopteron is a noteworthy 
event in New Zealand entomology. A species of Echmepteryx has been 
described from Western Australia, and a species of Echinopsocus from 
New Guinea; but this new genus is more archaic than either of these. 
It appears to occupy, within the order Psocoptera, a position closely 
analogous to that of the genus Sabatinca within the Lepidoptera, and 
there is also a close similarity in the venational type and in the structure 
of the scales. Parenthetically, it might be noted that these scales, if 
obtainable in sufficient numbers, would be of considerable value in testing 
the resolving-powers of lens-combinations for high magnifications. 
Family MESOPSOCIDAE. 
Antennae with 13 joints. Ocelli present. Maxillary palpi four-jointed, 
the last joint of normal elongate-oval shape. Tarsi three-jointed, the 
basal joint longer than the other two together. Venation of the normal 
type, the forewing with Cu, and 1A ending together. Cubital loop of 
forewing present, but not touching M above it. No scales on body or 
wings. 
KEY TO THE NEW ZEALAND GENERA OF MESOPSOCIDAE. 
Wings hairless and without fringe .. Mesopsocus Kolbe. 
1 (Genotype, Mesopsocus unipunctatus Miller r.) 
| Wings with a fringe of hairs, the forewing with hairy veins .. 2 
Pterostigma with a small stump-vein projecting downwards 
2 from the ик of its rhon border .. Philotarsopsis n. g. 
G pe, Philtarsopeis t n. Sp. ) 
| Pterostigma dismal ui thou mp-v 3 
се very dar sae dee iin: as Ri as 
g; antennae with Beads erous whorls of hairs as long 
as the in individua] join Zelandopsocus n. g. 
3 (Genotype, Ze casi us formosellus n. sp.) 
Forewing of normal shape, Kane one-third as broad as long ; 
antennae with only very short hairs Philotarsus Kolbe. 
(Genotype, Philotarsus picicornis [Fabr.]. ) 
Genus Paitotarsus Kolbe. 
Characters as given in the key above. The genus was separated from 
ipsocus Hagen by Kolbe on the amount of fringe present in ius мв 
wing. In Philotarsus the fringe of hairs is complete in this win 
Elipsocus the hairs are confined to the margin around the apex. E The 
genus is also closely allied to Hemineura Tetens, in which the hindwing 
possesses no fringe of hairs at all. 
Genotype -—Philotarsus picicornis (Fab 
Two species of this genus have been described from Australia. The 
two known New nda species may be separated by the following key :— 
Insect of mrs build, veins of the forewing strongly formed; Cu; 
of fore g hairy; cane dark ; middle part of forewing 
И саа Ph. gutlatus п. 8р. 
Insect of slenderer build, eins of the forewin 
built; Cus of forewin withóbi : RS stoutly 
wing wi ; stigma 
. with a dark patch at each ndi Tii or no км 
‚ part of forewing 
