150 
Psyche 
[December 
advantages of the Museum of Comparative Zoology at 
Harvard College. 
Genus Dictyna Sundevall, 1833 
Dictyna lecta sp. nov. 
(Figure 1) 
Male holotype. — Total length 1.41 mm. (Abdomen and 
cephalothorax detached ; otherwise in good condition) . 
Carapace .704 mm. long; .55 mm. wide opposite second 
coxae where it is widest; pars cephalica very prominent 
and quite convex; almost circular from opposite palps; 
.352 mm. tall and, therefore, about .64 as tall as wide. 
Eyes. — Eight in two rows: only AME diurnal. Viewed 
from above, posterior row moderately recurved. Viewed 
from in front, anterior row moderately procurved. Central 
ocular quadrangle wider behind than in front in ratio of 
5:4; wider behind than long in ratio of 5 : 4; posterior 
row fully as wide as pars cephalica at that level ; posterior 
row wider than anterior row in ratio of 28 : 25. Ratio of 
eyes ame : ale : : pme : ple=3.5 : 5 : : 4.5 : 5 (long dia- 
meters). AME separated from one another by a little more 
than 1.5 times their diameter, from ale by their diameter. 
PME separated from one another by a little more than 1.5 
times their diameter, from ple by slightly less than 1.25 
times their diameter. Laterals separated from one another 
by .3 of their diameter. Clypeus grooved below ame and 
ventral half strongly protrusive, the latter part provided 
with several stiff convergent bristles. Height of clypeus 
equal to about three times the diameter of AME. 
Chelicerae. — Essentially vertical and parallel if taken 
as wholes; considerably bowed outward just above the 
middle of the outer border; excavated medially so as to 
form a long narrow oval opening between the two; with 
a prominent basal boss having a keel which extends for 
some distance; moderately concave in front; basal seg- 
ment .40 mm. long; fang appears to be weak; impossible 
to determine exact number and position of teeth along 
fang groove without serious injury to type. 
