ON SOME ACARINA FROM NORTH CAROLINA 1 
By Nathan Banks 
Holliston, Mass. 
Among a considerable number of mites collected by 
Prof. A. S. Pearse at Durham, North Carolina, are some 
new species and other rare or little known forms. Of 
particular interest is the rediscovery of Say’s Erythrceus 
mamillatus, which proves to belong to the genus Labidi- 
stomma, not previously recognized in the eastern part of 
our country. The genus Xenillus, hitherto not noted 
from America is also of interest; it was described many 
years ago as a new genus of beetles. The highly special- 
ized group of Gymnodamseini is represented by four spe- 
cies, in three genera, two of which are new. A specimen 
of the peculiar Zetorchestes equestris, described by Ber- 
lese from Missouri, is the first in an American collection. 
ERYTHRHDIDAE 
Erythrasus exilipes sp. nov. 
Figs. 30, 35 
Body nearly two and one-fourth times as long as broad, 
broadest just above third coxae, a little before middle of 
length, front margin nearly straight across, two eyes each 
side, about diameter apart, median groove about one-half 
as long as front margin. Body covered with stout, sharp- 
pointed spines, rather long, and mostly erect ; many, when 
magnified, are seen to be covered with minute sharp 
spicules. Legs also with bristles, those on coxae about as 
coarse as on body, but beyond becoming finer, and mostly 
appressed, those on the under side of the last joint of 
front legs very fine and short. 
Legs long and slender, all tarsi swollen. Front legs 
nearly twice as long as body, the third joint from tip 
(tibia) about as long as greatest width of body, tarsus 
about two-thirds of protarsus; second pair of legs but 
little longer than body ; the tarsus about three-fourths of 
1 Published with a grant from the Museum of Comparative Zoology at 
Harvard College. 
110 
