14 
Psyche 
[March- June 
veins sometimes narrowly brown margined. First posterior 
cell always narrowly open ; appendix on third vein constant, 
generally longer than the distance from its origin to the 
furcation of the vein. Abdomen brown, greyish pollinose 
and black haired. The first to fifth tergites bear small 
median triangles of yellowish hairs. Venter lighter, wholly 
yellowish haired, except the last sternite which bears erect 
black hairs. 
Male. — Similar to the female in coloration. Large eye 
facets distinctly differentiated and demarkated from the 
small, occupying about half to two thirds of total eye area. 
Large facets pale tan, small facets purple, with a narrow 
band and the lower margin green in life. A small tubercle 
is present between the eyes at vertex. 
Holotype 2 , Mbja Polio, Chagres River region, Panama, 
Dec. 6, 1939 ; Allotype $ , same locality, June 12, 1940 ; 39 2 
Paratypes, same locality, Dec. 6, 1939, (6) Jan. 19, (2) 
Jan. 23, (1) Jan. 31, (1) Feb. 16, (8) May 2, (1) May 15, 
(4) May 27, (4) June 12, (2) June 24, (3) July 8, (1) 
July 23, (2) Aug. 4, (1) Aug. 18, (1) Sept. 1, (1) and Sept. 
7 (2), all 1940. 3 2 Paratypes, El Real, Darien, Panama, 
Feb. 10, 1940. 2 2 Paratypes, New San Juan, Chagres 
River region, Panama June 28 and July 2, 1939. 1 2 
Paratype, Juan Mina Station, Chagres River region, C. Z. 
May 9, 1939. 1 2 Paratype, Camp Pital, Chiriqui, Panama, 
July 11-20, 1929 (Dunn) . Besides the above, I have numer- 
ous females unpinned from Moja Polio, with dates ranging 
from March 1940 to March 1941. Holotype, Allotype, and 3 
Paratypes to be deposited in the M. C. Z. 
This species was confused by Dunn (1934) with true 
albocir cuius Hine, from which it may be distinguished by 
the characters in the key. It flies in company with that 
species, and appears to be about equally abundant. The 
relationship between the present species and oculus Wlk. 
appears to be very close, the main differences being the much 
narrower green bands of the eye, the open first posterior cell 
and the somewhat broader and parallel sided frons of pseu- 
doculus. Ordinarily, little importance could be attached to 
the venational character, but in this case it appears to be 
relatively stable, all specimens of oculus seen having the cell 
closed and long petiolate, while in pseudoculus it is always 
very clearly open. 
