62 
Psyche 
[March 
A NEW BEE OF THE GENUS ANDRENA VISITING 
SENECIO 
By T. D. A. Cockerell, 
University of Colorado, Boulder, Colo. 
In a large genus like Andrena, the discovery of a new species 
excites little interest, but the one now recorded has rather special 
claims. At Winfrith, Dorset, in England, on April 20, 1921, my 
wife and I had the pleasure of collecting both sexes of the beau- 
tiful Andrena ( Trachandrena ) albicans Muller. When I put the 
specimens away in the Trachandrena box, I remarked that where- 
as the North American fauna was rich in this group, there was 
nothing quite so beautiful as the English cousin, with bright red 
hair on the thorax above, white hair on the pleura, and bandless 
abdomen. However, on May 17, 1927, Mr. Chas. Wagner, one 
of my students, captured an Andrena on Senecio flowers at White 
Rocks, near Boulder, Colorado. When he brought it in, I said, 
“Where have you been? You must have been to England!” 
Superficially, it was just like A. albicans, though closer inspection 
showed various differences, thus the pleura is black haired, and 
the hair at end of abdomen is black, not red. It may be described 
thus: 
Andrena seneciophila n. sp. 
Female . Length nearly 11 mm.; a typical member of the 
subgenus Trachandrena ; black, including antennse and legs, 
tegulse brown; head ordinary, face broad; process of labrum 
broadly truncate; malar space linear; clypeus coarsely and 
quite closely punctured, the punctures tending to run in longi- 
tudinal lines, apical third with a median smooth line; facial 
fovese seen from above seal brown, running close to eyes sep- 
arated by a shining band, extending downward to level of top of 
clypeus; third antennal joint not quite as long as next two to- 
gether; hair of head thin, mostly black, but red on occiput, and 
slightly reddish in region about antennae; mesothorax and scu- 
