1970] 
C bickering — Oonops 
491 
Oonops ornatus sp. nov. 
Figures 3-6 
Holotype. The male holotype is from Boquete, Panama, August 
4-1 1. 1954. The name of the species is a Latin adjective suggested 
by unusual palpal tarsal decorations. 
Description. Total length about 1.94 mm including extended spin- 
nerets. Carapace about 0.81 mm long; 0.68 mm wide opposite second 
coxae where it is widest; about 0.32 mm tall; only slightly arched 
from PME to beginning of steep posterior declivity; shape of cara- 
pace in profile very similar to that of O. reticulatus ; surface smooth 
and shining; with coarse, dark bristles along median and ocular 
regions; posterior border slightly overlapped by abdomen; no median 
thoracic groove or pit observed. Eyes: six as usual in a moderately 
compact group; posterior row occupies about seven-tenths of width 
of carapace at that level and is definitely recurved. Ratio of eyes 
ALE: PME : PLE = nearly 9:7:8 (some irregularities noted 
and pigment is somewhat irregularly distributed thus making it 
difficult to measure with the desired accuracy). ALE separated 
from one another by nearly their long diameter (Fig. 3) ; sub- 
contiguous to PLE and separated from PME by nearly one fourth 
of their long diameter. PME contiguous to one another and 
separated from PLE by nearly half their radius. Clypeus very 
narrow with exact height obscure. Chelicerae: vertical, essentially 
parallel; apparently without special modifications. Maxillae distally 
narrowed and probably obscurely modified but details not deter- 
mined. Lip: somewhat longer than wide; without special modi- 
fications. Sternum: very convex; longer than wide in ratio of about 
12 : 11 ; obtusely rounded posterior end extended between bases of 
fourth coxae which are separated by about 1.3 their width; surface 
smooth and shining; only faintly grooved; with numerous long, stiff, 
dark, spiniform bristles; widest between second coxae but nearly as 
wide between first coxae. Legs: 4123 in order of length; it is 
difficult to distinguish between stiff, spiniform bristles and true spines 
but, as in O. reticulatus , after repeated examinations I have decided 
that we must recognize numerous, transparent spines on the legs; 
trichibothria are fairly prominent but their exact numbers and place- 
ment have not been determined. Palp: essential features shown in 
Figures 4-5 ; the distal end of the tarsus and the unusual, feathery 
hairs on the prolateral surface of the cymbium are the most distinctive 
features. Abdomen: regularly ovoid in shape; spinnerets essentially 
typical of the genus; the region anterior to the genital groove appears 
