1970] 
Chickering — Oonops 
509 
Oonops tenebus sp. nov. 
Figures 43-46 
Holotype. The male holotype is from the Panama Canal Zone 
Forest Preserve, February 14, 1958. The name of the species is an 
arbitrary combination of letters. 
Description. Total length, exclusive of the extended spinnerets, 
1.39 mm; including the spinnerets total length is 1.49 mm. Cara- 
pace 0.68 mm long; 0.54 mm wide opposite second coxae where it 
is widest; nearly 0.26 mm tall; with no median thoracic groove 
observed; nearly level along median region from just behind PME 
to beginning of steep posterior declivity. Eyes: six as usual in a 
moderately compact group ( Fig. 43 ) ; seen from above, posterior 
row recurved and occupies a little more than five-sixths of width of 
carapace at that level. Ratio of eyes ALE : PME : PLE = nearly 
7.25 : 7 : 6. ALE separated from one another by nearly six-sevenths 
of their long axis; separated from PME by nearly two-sevenths of 
their long axis and nearly contiguous to PLE. PME contiguous to 
one another for about one-fourth of their circumference and separated 
from PLE by nearly one-fifth of their long axis. Clypeus difficult 
to observe but its height appears to be nearly three-sevenths of the 
long axis of ALE. Chelicerae : vertical ; parallel ; with no special 
modifications observed. Maxillae: convergent; considerably longer 
than lip ; with no special modifications observed. Lip : essentially 
typical of the genus. Sternum : fragile, folded legs prevent the usual 
close observation ; moderately elevated ; longer than wide in ratio of 
nearly 4 : 3 ; extended just to bases of fourth coxae which are 
separated by nearly their width ; with no lobes or grooves observed. 
Legs: 4123 in order of length; apparently only very few spines on 
first and second legs; third and fourth legs with numerous spines 
especially on tibiae and metatarsi (Fig. 46). Palp: femur of moder- 
ate length ; patella and tibia short ; tarsus inflated and with obscurely 
distinctive features (Figs. 44-45). Abdomen: essentially typical of 
Figs. 40-42. Oonops sicorius sp. nov. Fig. 40. Eyes of male holotype 
from above. Figs. 41-42. Left palp of male holotype; nearly dorsal and 
nearly retrolateral views, respectively. Figs. 43-46. Oonops tenebus sp. nov. 
Fig. 43. Eyes of male holotype from above. Fig. 44. Left palp of male 
holotype; prolateral view. Fig. 45. Left palpal tarsus of male holotype; 
nearly ventral view. Fig. 46. Right fourth tibia of holotype; dorsal view. 
Figs. 47-51. Oonops vestus sp. nov. Figs. 47-48. Carapace of male para- 
type; from above and left lateral side, respectively. Fig. 49. Eyes of holo- 
type from above. Fig. 50. Left palp of male holotype ; prolateral view. 
Fig. 51. Epigynal area of described female paratype from below. 
