H4 
Psyche 
[June 
From a male and a female on loan from the British Museum 
(Natural History) the following facts have been derived. 
Male. Total length 1.56 mm. Carapace 0.64 mm long; 0.53 mm 
wide opposite second coxae where it is widest ; 0.23 mm tall ; some- 
what raised just behind PME and then level along middorsal region 
to beginning of posterior declivity. Eyes: six in a compact group as 
usual (Fig. 5) ; ALE well separated; with little pigment in ocular 
area; viewed from above, posterior row slightly procurved; bound- 
aries of clypeus obscure but height is probably nearly equal to 
diameter of ALE. Chelicerae: each with a curious cone-shaped 
projection in front near base (Fig. 5). Maxillae and lip appear 
essentially as described for other species. Sternum : scutiform ; con- 
vex; moderately lobed opposite coxae along margin but not deeply 
grooved as in Dysderina (Fig. 6) ; fourth coxae separated by a little 
more than their width; terminated opposite bases of fourth coxae; 
third coxae globose and all others somewhat more elongated. Legs: 
4123 in order of length with first and fourth only slightly different. 
Palp: both tarsi fully developed; essential features shown in Figure 
7 ; other segments without special modifications. Abdomen : dorsal 
scutum covers entire dorsum and extends laterally nearly to ventral 
scutum so that very little of the unshielded surface shows; no sclerite 
has been observed in association with the spinnerets. Color in alcohol : 
as it now appears after long preservation the color is a light yellowish. 
Female. Total length 1.73 mm. Carapace 0.64 mm long; 0.49 
mm wide opposite second coxae where it is widest; about 0.21 mm 
tall. Eyes: essentially as in male but posterior row slightly more 
procurved than in that sex and the ALE are somewhat closer to- 
gether; apparently a. slight asymmetry in the PME. Sternum es- 
sentially as in male with grooves about the same. Abdomen: with 
a well defined ventral scutum (Fig. 8) somewhat restricted in lateral 
dorsal extensions so that a large part of both dorsum and dorsolateral 
parts are left bare and white in coloration; the sclerite associated 
with the spinnerets is present but hardly visible; epigynal area as 
shown in Figure 9. Other features essentially as in male. 
Scaphiella gertschi Chickering 
Figures 10-14 
Scaphiella gertschi Chickering, 1951: 235, figs. 24-27. The male holotype 
from Barro Colorado Island, Panama Canal Zone is in the Museum of 
Comparative Zoology. 
In 1951 the only male available for study was the holotype. Since 
that time I have collected a large number of both sexes. For example, 
over 100 were taken on one day at Summit, Canal Zone and nu- 
