84 
Psyche 
[March 
light yellowish with some variation. Palps conspicuously dark brown 
as usual in the genus. Abdomen light yellowish with poorly chitinized 
scuta slightly darker. 
Female paratype. Total length 1.43 mm exclusive of extended 
spinnerets; including extended spinnerets total length is 1.56 mm. 
Carapace .66 mm long; .59 mm wide; about .44 mm tall; otherwise 
essentially typical of females of the genus. Eyes: apparently es- 
sentially as in male; chitin in ocular area raised thus distorting the 
appearance of these organs. Chelicerae, maxillae and lip: apparently 
all essentially typical of females of the genus. Sternum: quite convex; 
longer than wide in ratio of about 7 : 6; fourth coxae separated by 
nearly 1.33 times their width. Legs: essentially as in male; first 
femur with three long, ventral spines along promargin in distal half 
and probably two weak ventral spines on retromargin in distal half; 
first tibia with four pairs of ventral spines; first metatarsus probably 
with two pairs of ventral spines; second leg appears to bear ventral 
spines essentially like those on first leg but fragility of paratype 
prevents close observation. Abdomen : essentially typical of females 
of the genus except for the scuta; dorsal scutum hardly discernible; 
ventral and epigastric scuta clearly visible and in general like those of 
other species in the genus; outlines of ventral scutum and epigynal 
area difficult to determine ; center of the latter with the usual ob- 
scure pattern of small, twisted canaliculi. 
Records. Because of some confusion in sorting there seems to 
be a slight uncertainty about the type locality and the locality from 
which a male paratype and a female paratype were obtained. As far 
as can be determined at the present time all three specimens were 
collected by Dr. W. L. Brown in Costa Rica, Rio Toro Amarillo, 
near Guapiles, Heredia, March, 1966. 
Ischnothyreus indressus sp. nov. 
Figures 13-20 
Flolotype. The male holotype is from Nevis, B. W. I. Sept. 24- 
29, 1966. The name of the species is an arbiitrary combination of 
letters. 
Description. Total length 1.58 mm. Carapace .75 mm long; 
.6 mm wide; about .24 mm tall; abruptly raised immediately behind 
PME; otherwise essentially as in I. peltifer (Simon). Eyes: six as 
usual in the genus; compactly arranged about as in I. peltifer 
(Simon) ; posterior row straight, viewed from above and measured 
by posterior borders. Ratio of eyes ALE : PME : PLE = 8:7: 
7. ALE separated only by a line; contiguous to PLE and separated 
