1972] 
C bickering — Oonops 
105 
nized with reasonable certainty may be given as follows: Oonops 
aristelus sp. nov. ; O. balanus Chickering; O. delegenus sp. nov.; O . 
ebenecus sp. nov.; O. fguratus Simon; O. globimanus Simon; O. 
oblucus sp. nov.; O. pallidulus Chickering; O. pulicarius Simon; O. 
reticulatus Petrunkevitch ; O. validus Bryant; O. viridans Bryant. 
A total of thirty species in the genus Oonops are now recognized 
from the region included in this study and reported in Parts 1-3. 
Genus Oonops Templeton, 1835 
Oonops aristelus sp. nov. 
Figures 1-5 
Holotype. The male holotype is from Antigua, B. W. I., August, 
1967; collected by Mrs. Elsa Sabath. The name of the species is an 
arbitrary combination of letters. 
Description. Total length 1.21 mm. Carapace nearly 0.57 mm 
long; 0.43 mm wide opposite second coxae; considerably narrowed 
just anterior to first legs; nearly 0.21 mm tall at beginning of pos- 
terior declivity which is very steep in uppermost third and then 
moderately so to posterior border ( Fig. 1 ) ; with no evidence of a 
thoracic groove or pit. Eyes: six in two rows in a compact group 
(Fig. 2). Viewed from above, posterior row definitely recurved and 
wider than anterior row in ratio of nearly 17 : 15; occupies nearly 
0.8 of width of carapace at that level. Ratio of eyes ALE : PME : 
PLE — nearly 6:5: 5.25. ALE separated from one another by 
nearly two-thirds of their diameter and separated from PME and 
PLE only by lines. PME contiguous for nearly one-third of their 
circumference and narrowly separated from PLE. Clypeus very nar- 
row; with height a little less than one-fourth of the diameter of 
ALE. Chelicerae and lip apparently typical of the genus and un- 
modified. Maxillae probably with distal modifications but absence of 
paratypes prevents dissection and careful observation. Sternum : mod- 
erately convex; nearly as wide as long at interval between first and 
second coxae; surface smooth and shining; with marginal hairs but 
without marginal lobes or grooves; bluntly terminated between bases 
of fourth coxae which are separated by a little more than their 
width. Legs: apparently 4 — 123 in order of length (curled and 
fragile legs prevent usual exact measurements); spines on first and 
second legs few in number and obscure; those on third and fourth 
legs fairly clear and more numerous; trichobothria. observed but 
exact number and placement not determined. Palp: essential features 
shown in Figures 3-4; bulb inflated but cymbium is shorter than 
usual; tibia and patella short and rounded. Abdomen: typical of 
males of the genus and without special modifications. 
