oct. 19, 1923 SANDHOUSE: KEY TO SOME SOUTH AMERICAN BEES 383 
angle, the convexly curved under side of the distal end, and the 
smaller diameter and rough finish of the tang or manual portion, are 
all points of resemblance that cannot fail to impress themselves on 
one who studies the figures and even more so the objects themselves. 
There has thus been evolved what is in essential features an almost 
identical tool, made of the most suitable local material, one used 
nearly five thousand years ago to excavate rather soft limestone, 
and the other used to cut wood up to within recent years. This 
may bear out Prof. Elliot Smith’s thesis that some of the Polynesian 
and Pre-Columbian American culture originated in ancient Egypt 
after about 800 B.C. and was spread eastward by mariners. I am 
inclined to think, however, that the tools are of quite independent 
origin, and that the close resemblances between them are the result- 
ants of the human mind having worked out the problem of rough 
cutting with hard stone in much the same way. 
ENTOMOLOGY.—A key to some South American bees belonging to 
the genus Halictus subgenus Chloralictus. Grack ADELBERT 
SanpHousE, University of Colorado, Boulder, Colorado. (Com- 
municated by 8S. A. RoHWER.) 
Although the metallic-colored bees of the Genus Halictus, subgenus 
Chloralictus, occur over a large part of the North American con- 
tinent they are found in South America only along the Andes 
Mountains; some have been reported from Ecuador, Peru, and Chile, 
and a few species have evidently crossed the mountains into Argen- 
tina. These in general resemble the North American species very 
closely, there being no more difference between the species from 
North and South America than exists between many North American 
species. 
The following key includes the females of the South American 
species in the collection of Professor T. D. A. Cockerell of the Univer- 
sity of Colorado. 
Abdomen green, color of head and thorax; (disk of propodeum with irregularly 
SURE GAGA. CME AE cc. ca.'<., sy. Strategy sees danicorum Cockerell. 
ADOHIeRVOTay Or indGle, MANO, IFN SRLS OR SIRO GI 1 
1. Mesothorax opaque, microscopically tessellate between very close punc- 
(AI a ont ngs! Coll ACERS Age SR ay Bi, RNAS a Spr spinolae Reed. 
Mesothorax shining or more sparsely punctured.................++-- 2 
OP Terie” ales eee ee ete i eRe SEO SOB, OTE 3 
Terulad Carino te eee oe Se RRO. CRI at Storied eS 5 
3. Head and thorax golden green; knees, tips of tibiae and tarsi red-testaceous 
chrysonotus Ellis. 
Head and thorax not golden green; legs dark............... eee eeeee + 
