170 
Psyche 
[September 
pressions. Posterior spiracle rugulose basally and rather strongly 
carinate. 
Red Tank, Canal Zone, Panama. March 28, 1923. 
Type and allotype— Cat. No. 26478, U. S. N. M. 
Described from two females and two males, reared by Dr. 
Wheeler from pupae collected in nests of Crematogaster ( Ortho - 
crema ) brevispinosa Mayr. subsp. tumulifera Forel in Cordia al~ 
liodora Ruiz and Pavon. 
The long and slender puparia, without reticulations and 
with their heavily fossulate anterior spiracles are very different 
from any other Microdon pupae I have seen. 
The adults are remarkable for their slender form, elongate 
front, the large ocellar tubercle and the laterally excised scu- 
tellum. The pile is unusually coarse, especially at the front of 
head and on the thorax, and is mostly a rich golden yellow. 
The coloration, as described for the female, may not be fully 
mature. Dr. Wheeler tells me that all the specimens were yellow 
at the time of emergence and darkened gradually. 
III. BEES COLLECTED BY DR. W. M. WHEELER AT 
FLOWERS OF TRIPLARIS. 
By T. D. A. Cockerell. 
University of Colorado, Boulder, Colo. 
The bees collected by Dr. Wheeler at Triplaris americana 
flowers in the Panama Canal Zone include seven species, which 
may be readily separated as follows: 
Eyes hairy; three submarginal cells 1 
Eyes not hairy, two submarginal cells, or the second evanescent. 2 
1. Abdomen mainly dark (Fort Clayton, Feb. 28, two workers 
at Triplaris ) Apis mellifera Linnaeus. 
Abdomen with basal portion fulvous (Balboa, March 27, one 
worker at Triplaris ). . Apis mellifera var. ligustica Spinola, 
