1961] 
Mockford — Psilopsocus 
43 
b. Phallic frame. The simple, rounded phallic frame of 
Psilopsocus bearing a pair of lateral thickenings and enclosing a pair 
of membranous lobes is reminiscent of this structure in Lichenomima 
pauliani Bad. (Badonnel, 1955, fig. 529) and Rhaptoneura eatoni 
McL. (Badonnel, 1943, fig. 143) . It differs little from this structure 
in Lichenomima maxima Sm. (Smithers, 1957* fig- 6). 
c. Paraproct. The paraproct of Psilopscus is similar to those of 
most Myopsocids in bearing a pointed process on its posterior margin. 
Although several species of Myopsocids have two such processes, 
there is only one in Phlotodes angolensis Bad. (Badonnel, 1955? fig- 
514). The male paraproct of the latter species resembles that of 
Psilopsocus in several other respects, including shape of the field of 
trichobothria and presence of a roughened area antero-dorsad of this 
field. 
4. Female genitalia. 
a. Subgenital plate. The subgenital plate of Psilopsocus is sim- 
ilar in structure to that of Rhaptoneura. The resemblance is espe- 
cially marked in the case of R. africana Bad. (Badonnel, 1 955 > fig- 
508). In both forms the pigmented basal area consists of a pair of 
widely diverging arms; the central process is broad basally, narrowing 
abruptly to a slender tongue which bears setae on or near its apex. 
b. Ovipositor valvulae. Both Psilopsocus and the Myopsocids 
have three pairs of ovipositor valvulae. The second valvula terminates 
as a long, slender process in both groups, although this is generally 
much longer in the Myopsocidae than in Psilopsocus. The third 
valvula is a simple flap bearing many setae in both groups. 
c. Sclerites of the ninth abdominal sternite. These sclerites in 
several Lichenomina species (Badonnel, 1955, figs. 522-525; Smithers, 
1957, fig- 1 1 ) are composed of three main sclerotized areas, and are 
thus similar in appearance to the same group of sclerites in Psilopsocus 
nebulosus with their three radiating sclerotized straps. 
d. Paraproct. The female paraproct is similar in shape, cilia- 
tion, and position of the field of trichobothria in the two groups. 
The differences between the Myopsocidae and the Psilopsocidae 
are not great. The only ones which I have found are ( 1 ) presence in 
Myopsocidae of a connection between areola postica and medial stem 
in the forewing and absence of this in Psilopsocidae, (2) presence in 
Psilopsocidae of a spur vein from the pterostigma and its absence in 
Myopsocidae, and (3) much more complex markings of the forewing 
in Myopsocidae than in Psilopsocidae, with characteristic alternating 
dark and light areas on veins in the former group. 
