158 
Psyche 
[September 
larities in the outline of certain of the eyes; there seem to be differ- 
ences in the relative positions of certain of the eyes in some individuals 
and, apparently, noticeable differences in size of corresponding eyes in 
certain individuals. When eyes are oval in outline, as they usually 
appear, the long axis is used in measurements. 
The collections from Costa Rica and Trinidad, W. I. from which 
the three new species of A ccola were obtained were made possible by 
Grant GB-1801 from the National Science Foundation. My gratitude 
and appreciation are also again expressed for the privilege of working 
in the Museum of Comparative Zoology at repeated intervals over a 
period of many years. Publication and library privileges together 
with continued encouragement from directors and staff members 
have been indispensable for the continuation of my studies. 
Genus A ccola Simon, 1889 
Accola downeyi sp. nov. 
Figures 1-5 
The species is named after Dr. John C. Downey, Professor of 
Zoology, Southern Illinois University, Carbondale, Illinois. 
Male holotype. Total length from clypeus to posterior end of 
abdomen 3.9 mm; from anterior border of porrect chelicerae to pos- 
terior end of abdomen 4.29 mm. Carapace 1.67 mm long; 1.32 mm 
wide opposite second coxae where it is widest; .44 mm tall; dorsal 
striae moderately well developed ; dorsal median fovea a well defined 
pit opposite third coxae; stiff bristles along broad posterior border as 
usual in the genus; with a recurved row of stiff bristles shortly 
behind the median fovea; with numerous hairs and stiff bristles else- 
where. Eyes: six only; essentially as in A. lewisi Chickering, 1964 
from Jamaica, W. I.; all compactly grouped on a low tubercle 
(Fig. 1); viewed from above, posterior row strongly recurved as 
usual; all eyes white; ratio of eyes ALE : PME : PLE = 11 : 5 : 
11. ALE separated from one another by a little less than one fourth 
of their diameter; PLE separated from one another behind by slightly 
less than their diameter; PME separated from one another by about 
3/10 of their diameter and from PLE by about one fifth of their 
diameter. Chitinized clypeus almost non-existent ; membranous region 
below chitinized portion quite conspicuous. Chelicerae: paraxial, 
parallel, porrect as usual in the genus; fairly robust; with a well 
developed coat of stiff bristles; fang long, slender, evenly curved; 
promargin of fang groove with a row of ten teeth; a cluster of very 
minute teeth, irregularly arranged along the obscure retromargin 
opposite the last four promarginal teeth (teeth observed on a para- 
