1925] Bremus Resembling Mallophorce of Southeastern U. S. 191 
characters is available, it is best to consider it a distinct species. 
Mallophora faiitrix O. S. another western species, smaller than, 
but bearing a superficial resemblance to, orcina, may be easily 
distinguished by the reddish ground color of the femora (instead 
of black) and the absence of black pile on the abdomen. 
Mallophora bomboides (Wied.) is abundant in some parts of 
Florida and has also been taken in Georgia. The type locality 
is “Georgia.” The only records of M. nigra Willst. that I could 
obtain are from Florida. M. rex sp. n. I have from N. Carolina, 
Mississippi, and Florida; while M. chrysomela sp. n. is rep- 
resented by specimens from Georgia and Mississippi. 
All five species are quite closely related. The first species to 
be described was named bomboides by Wiedeman evidently 
because of its resemblance to a bumble-bee. The resemblance 
is not as striking, however, when the insect is observed in the 
field, as in the case of orcina. 
In 1893, Coquillet devised a key to the genus Mallophora 
dealing with all species then known to occur in America north 
of Mexico (Canadian Entomologist, vol. 25, no. 5, p. 118). The 
key presented below does not include all of the species of this 
genus, but simply a natural group of five species occurring in 
the Southeastern United States, and is included for the purpose 
of bringing out clearly the differences existing between the two 
new species described and those most nearly resembling them. 
1. Pile of abdomen wholly black nigra Willst. 
Pile of abdomen partly light-colored 2 
2. Light-colored pile on basal 4 or 5 tergites. . . . orcina Wied. 
Light-colored pile on first 3 tergites: always black on 4th 3 
3. Wings light yellowish-brown bomboides Wied. 
Wings dark purplish-brown 4 
4. 3rd joint of antenna ^3 length of arista: male genitalia with 
yellow hair chrysomela sp. n. 
3rd joint of antenna subequal to arista in length: male 
genitalia with black hair rex sp. n. 
A table is also included, showing points of contrast in the 
case of the four species whose characters make them difficult 
to distinguish. Length measurements of the body do not mean 
