44 
Psyche 
[March 
Pearman (1936) has designated the families Myopsocidae, Psocidae, 
and Thyrsophoridae as constituting the group Psocetae. To this group 
should be added the Psilopsocidae. It appears that this group repre- 
sents an ancient phylogenetic line within the suborder Psocomorpha, 
in which the most primitive forms share a broad, multidenticulate 
lacinial tip with the Group Epipsocetae. It seems likely that this type 
of lacinial tip, found also in the Amphientomidae (Suborder Trocto- 
morpha) was present in the earliest forms of the Suborder Psoco- 
morpha. 
Acknowledgements 
I wish to thank the officers of the Chicago Natural History Mu- 
seum, Mr. Henry Dybas in particular, for arranging the loan of 
material discussed in this paper. The accompanying photomicrograph 
(text figure 1) was made by Dr. Robert D. Weigel of the Depart- 
ment of Biological Sciences, Illinois State Normal University. 
Literature Cited 
Badonnel, A. 1943. Faune de France. Psocopteres. Paris, P. Lechevalier 
et Fils, 164 pp. 
Badonnel, A. 1955. Psocopteres de l’Angola. Comp. Diamant. Angola 
Pub. Cult. 26: 1-267. 
Enderlein, G. 1903. Die Copeognathen des Indo-australischen Faunenge- 
bietes. Ann. Mus. Hung. 1:179-344. 
Pearman, J. V. 1936. The taxonomy of the Psocoptera: preliminary sketch. 
Proc. R. Ent. Soc. Lond. (B) 5: 58-62. 
Roesler, R. 1944. Die Gattungen der Copeognathen. Stett. Ent. Zeit. 105: 
117-166. 
Smithers, C. N. 1957. Three new species of Myopsocidae (Psocoptera) 
from Natal. Proc. R. Ent. Soc. Lond. (B) 26:11-16. 
