1970] 
Chickering — Oonops 
499 
to Oonops pallidulus (Chickering). The relative position of the 
eyes, the pedal spines, the shape of the carapace and the features of 
the epigynal area all seem to establish this as a new and distinct 
species. 
Records. One female paratype was taken with the holotype; one 
female, on loan from the American Museum of Natural History, 
New York City, was taken in Arima Valley, Trinidad, W. I. 800- 
1200 ft. elevation, February 10-22, 1964 (Wygodzinsky & Rosen). 
The male is unknown. 
Oonops donaldi Chickering 
Figure 23 
Oonops donaldi Chickering, 1951: 226, figs. 14-16. The holotype male from 
Barro Colorado Island, Panama Canal Zone is in the Museum of Com- 
parative Zoology, Harvard University. 
Only one male from Barro Colorado Island, Panama Canal Zone, 
June, 1950 has been added to the collection since the holotype was 
collected in 1936. Two females taken with this male appear to be 
immature and unfit for description. 
Oonops itascus sp. nov. 
Figures 24-26 
Holotype. The male holotype is from Simla, Trinidad, W. I., 
April 23, 1964. The name of the species is an arbitrary combination 
of letters. 
Description. Total length 1.58 mm. Carapace 0.69 mm long; 
0.57 mm wide opposite second coxae where it is widest; about 0.3 
mm tall; rises immediately behind PME and continues a gradual 
rise to highest point opposite interval between third and fourth coxae 
and then descends steeply to posterior border; similar to that of 
Oonops donaldi Chickering in profile; with no evidence of a median 
thoracic pit or groove; with a sparse covering of dark hairs; surface 
smooth and shining. Eyes: six as usual in a compact group; posterior 
row recurved and occupies nearly the entire width of the carapace 
at that level (Fig. 24). Ratio of eyes ALE : PME : PLE = 
nearly 7:8:7. ALE separated from one another by nearly five- 
sevenths of their diameter; subcontiguous to PME and slightly 
separated from PLE. PME contiguous to one another and sub- 
contiguous to PLE. Height of clypeus nearly equal to radius of 
ALE. Only a few inconspicuous bristles in ocular area. Chelicerae, 
maxillae and lip : all appear to be typical of the genus and without 
special modifications. Sternum: convex; scutiform; slightly the 
