366 
Psyche 
[December 
The author of this species had specimens of both sexes from Teapa, 
Mexico and Guatemala. Dr. Petrunkevitch first reported the species 
from Panama in 1925. Banks first identified Corinna eutypa Cham- 
berlin as a synonym of Corinna hulhosa F. P.-Cambridge. In 1937 
I had several specimens of both sexes from Barro Colorado Island, 
Panama Canal Zone. 
At the present time the collection in the Museum of Comparative 
Zoology includes many specimens of both sexes from the following 
localities in the Panama Canal Zone : Barro Colorado Island, Balboa, 
Canal Zone Forest Preserve, Madden Dam region, Gamboa. The 
collection also includes both sexes from Panama outside of the Canal 
Zone as follows: El Valle, Porto Bello. This species appears to 
be the most abundant of any of the species from Panama. 
Among the many specimens available for study I have noted 
considerable variation in color pattern. The epigynum varies con- 
siderably; some females show no spermathecae ; in some others these 
organs are relatively small; in still other specimens they are rela- 
tively large. Some specimens show a fairly well delineated dorsal, 
abdominal scutum but in some other individuals there is little or 
no evidence of the feature. The palpal features of males seem to 
occur with little or no important variations. Figures 1-6 illustrate 
what I consider to be the most important features of the male 
palp and some of the variations in appearance of the epigynum. 
Corinna perida sp. nov. 
Figure 7 
Holotype. The female holotype is from Barro Colorado Island, 
Panama Canal Zone, July 7, 1936. The name of the species is an 
arbitrary combination of letters. 
Description. Total length, including extended chelicerae and spin- 
nerets, nearly 12 mm. Carapace nearly 4.8 mm long, nearly 4.18 mm 
wide opposite second coxae where it is widest; nearly 1.78 mm tall ; 
gently arched from PME to just above anterior end of well ex- 
posed median thoracic groove; with descent from that region to 
posterior border; union of thoracic and cephalic regions well marked. 
Eyes: eight in two rows as usual in the genus; viewed from above, 
posterior row gently procurved and anterior row nearly straight; 
viewed from in front, anterior row gently procurved. Central ocu- 
lar quadrangle only slightly wider in front than behind and only 
slightly wider in front than long. Ratio of eyes AME : ALE : 
PME : PLE = nearly 16 : 12 : 11 : 11.5. Lateral eyes quite 
oval ; long axes used for measurements. AME separated from one 
another by slightly more than their radius and separated from ALE 
