136 
Psyche 
[March 
quite typical of males of the genus and without special modifications. 
Color in alcohol: carapace a very light yellowish brown with a very 
narrow median gray stripe and irregular radiating grayish lines; 
with a moderate amount of black pigment in the ocular area ; sternum 
light grayish; legs and mouth parts yellowish with variations; ab- 
domen a light grayish on the dorsum and lateral sides and with more 
gray color irregularly distributed on the venter. 
Diagnosis. This species appears to be more or less closely related 
to Erigone tamazunchalensis Gertsch and Davis from Mexico but 
differs from that species in details of the male palp. 
Records. The female is unknown and there are no male paratypes. 
Erigone bereta sp. nov. 
Figures 10-12 
Holotype. The male holotype is from Corozal, Panama Canal 
Zone, May 25, 1964. The name of the species is an arbitrary com- 
bination of letters. 
Description. Total length 1.65 mm. Carapace 0.8 1 mm long; 
0.58 mm wide opposite second coxae where it is widest; cephalic 
region considerably raised much as in Erigone dentigera O. P.-C. ; 
thoracic portion very gradually slanted to posterior border; ventral 
margin with a series of small teeth beginning opposite first coxae; 
with a moderately well defined median, longitudinal, thoracic groove. 
Eyes: eight in two rows as usual; with chitin raised and with dis- 
tortion of eyes; apparently both rows are curved essentially as de- 
scribed for Erigone antegona sp. nov. Ratio of eyes AME : ALE : 
PME : PLE = nearly 7 : 10 : 9 : 8. AME separated from one 
another by slightly less than their diameter; separated from ALE by 
slightly more than their diameter. PME separated from one another 
by about seven-ninths of their diameter and from PLE by about 
two-thirds of their diameter. Laterals as usual, separated only by a 
line. Central ocular quadrangle wider behind than in front in ratio 
of about 4:3; wider behind than long in ratio of about 6 : 5. 
Height of clypeus nearly equal to four times the diameter of AME. 
Chelicerae: well extended to expose fang, fang groove and teeth; 
fang somewhat irregularly curved ; fang groove with six promar- 
ginal teeth of which the fifth is the largest and four retromarginal 
teeth, all small (Fig. 10) ; front surface of each chelicera with five 
teeth along the lateral margin with the first very small and others 
much larger and hooked; apparently each chelicera also has two or 
