236 
Psyche 
[December 
Diagnosis. The larger diameter and shortness of the female ducts 
(Figs. 87, 88) separate this species from C. alecula and C. arima. The 
large coiled embolus of the palpus (Fig. 89) is distinctive. 
Natural History. This species is found by beating vegetation. 
Records. Panama. Porto Bello, $ (A. M. Chickering). Panama 
Canal Zone. Forest Reserve, cf paratype (A. M. Chickering) ; Sum- 
mit, $ paratype (A. M. Chickering, A. M. Nadler, AMNH) ; Barro 
Colorado Island, $, cf paratypes (A. M. Chickering, A. M. Nadler, 
AMNH) ; Madden Dam (A. M. Chickering) ; Ft. Randolph (A. 
M. Chickering). Ecuador. El Oro: Rio JuDanes, Pasaje, Oct. 23, 
1942, cf (R. Walls). 
Chrysso volcanensis sp. n. 
Figures 91-95 
Thwaitesia vittata, — Banks, 1929, Bull. Mus. Comp. Zook, 69: 86. Not C. 
vittata O. P. -Cambridge. 
Type. Male from El Volcan, Panama, Aug. 9-14, 1950 (A. M. 
Chickering) in the Museum of Comparative Zoology. The species is 
named after the type locality. 
Description. Carapace, sternum, legs yellow-white. Legs with dark 
bands on middle and ends of segments. Abdomen yellow-white with 
white pigment areas on dorsum, sometimes with small black spots (Fig. 
91). Anterior median eyes one and one-half diameters apart, their 
radius from laterals in female ; one diameter apart, one-third diameter 
from laterals in male. Posterior median eyes a little more than one 
diameter apart, one from laterals. Total length of females 3. 5-4.5 mm. 
One female measured 3. 7 mm total length. Carapace, 1.2 mm long, 
0.8 mm wide. First femur, 5.0 mm; patella and tibia, 5.0 mm; meta- 
tarsus, 5.4 mm; tarsus, 1.4 mm. Second patella and tibia, 2.7 mm; 
third, 1.3 mm ; fourth, 2.6 mm. Total length of a male 2.5 mm. Cara- 
pace 1.2 mm long, 1.0 mm wide. First femur, 5.9 mm; patella and 
tibia, 6.0 mm; metatarsus, 7.5 mm; tarsus, 1.7 mm. Second patella 
and tibia, 3.6 mm ; third, 1.4 mm ; fourth, 2.6 mm. 
Diagnosis. The shorter ducts and embolus (Figs. 92-95) distinguish 
this species from C. questona. The epigynum (Fig. 93) has an indis- 
tinct shallow depression of variable shape. The small palpal embolus 
(Figs. 94, 95) separate the species from C. silva. 
Records. Costa Rica: Santa Maria Dota (Tristan). Panama. El 
Volcan, 9 , cf paratypes (A. M. Chickering). 
Literature Cited 
Levi, Herbert W. 
“1955” (1957). The spider genera Chrysso and Tidarren in America. 
Jour. New York Ent. Soc., 63 : 59-81. 
