190 Psyche [October 
of our burrowing bees of the genus Halictus. Some years ago 
Melander and Brues published an interesting account of H. 
pruinosus Robertson.! In this they showed that the most for- 
midable enemy of the bee is the Pseudomethoca. They found 
that the female Pseudomethoca hangs about the burrows and 
attacks the female bee, and they have given a very entertaining 
figure and description of a battle between the bee and the 
Mutillid. Fully fifty specimens of the latter insect were taken 
from one square meter of Halictus colony during a single sum- 
mer. In the dry pasture in which I found the gynandromorph 
there were many Halictus colonies, so that, in all probability, 
the specimen had passed through its larval and pupal develop- 
ment in one of the nests. 
LIST OF SPHINGIDZ OF AMERICA NORTH OF 
MEXICO. 
By Witui1amM Barnes, M. D., anp J. McDunnovuen, Pu. D. 
Decatur, Illinois. 
Since Rothschild & Jordan issued their Revision of the Lep- 
idopterous Family Sphingidez in 1903, no attempt has been made 
to give a complete list of our North American species based upon 
this monograph. Holland in his Moth Book follows their work 
but his list does not pretend to be complete; as several new ad- 
ditions to our fauna have lately come under our notice, and as 
we bave been made aware of several slight errors in the revision 
relating to North American species, it has occurred to us that 
an annotated list would perhaps be of service to collectors and 
future catalog makers. We have followed the revision as regards 
nomenclature in nearly every case, basing our remarks upon ma- 
terial in Coll. Barnes, which is practically complete in North 
American Sphingide. The list of localities is not intended to be 
exhaustive, but in most instances merely mentions localities from 
which we actually possess specimens. 
For the benefit of those unfamiliar with Rothschild & Jordan’s 

1 Guests and Parasites of the Burrowing Bee Halictus. Biol. Bull. V, No. 1, June 1903, 
pp. 1-27, 6 figs. 
