5io 
Psyche 
[December 
the genus; epigastric scutum barely discernible. Color in alcohol: 
carapace, legs, mouth parts and sternum all light yellowish with varia- 
tions; considerable black pigment in ocular area; abdomen very light 
yellowish, almost white with faintly indicated reticulations ; epigastric 
scutum faintly outlined. 
Diagnosis. This is the fourth species which I have come to regard 
as worthy of a separate grouping. It is regarded as being more or 
less closely related to Oonops anoxus sp. nov. but greater clarity 
on this question must await further study of the genus. The features 
of the palp together with other features mentioned in the description 
seem to establish it quite definitely as a new species. 
Records. Two male paratypes are in the collection from the 
Panama Canal Zone Forest Preserve, January, 1958 and Summit 
Gardens, Canal Zone, May, 1964. Two females were collected 
on the same day and in the same general locality as the male holo- 
type; one of these may be the female of this species but it is not 
described here because of the uncertainty involved. 
Oonops vestus sp. nov. 
Figures 47-51 
Holotype. The male holotype is from Simla, Trinidad, W. I., 
April 25, 1964. The name of the species is an arbitrary combination 
of letters. 
Description. Total length, exclusive of the somewhat extended 
spinnerets, 1.54 mm. Carapace 0.73 mm long; 0.54 mm wide opposite 
interval between second and third coxae where it is widest; nearly 
0.26 mm tall opposite third coxae where it is tallest; rises gradually 
but only moderately from PME to beginning of steep posterior 
declivity (Figs. 47-48) ; with no definite median fovea; with nu- 
merous stiff hairs in ocular region and shorter dark hairs over lateral 
and posterior surfaces. Eyes: six as usual in a fairly compact group 
(Fig. 49) ; posterior row rather strongly recurved and occupies 
nearly four-fifths of width of carapace at that level. Ratio of eyes 
ALE : PME : PLE = nearly 7 : 6.5 : 6. ALE separated from 
one another bv nearly five-sevenths of their long axis, subcontiguous 
to PLE and PME ; PME contiguous to one another for more than 
one-fourth of their circumference and separated from PLE by 
nearlv one-fourth of their long axis. Clvpeus very narrow; height 
probablv about equal to one- fourth of the long axis of ALE. Cheli- 
cerae, maxillae and lip apparently typical of the genus and without 
observed special modifications. Sternum: convex; smooth and 
