524 Mr, P. Cameron on 
side nearest the trochanters. The postpetiole is broad, some- 
what as in the Platyuri; the apical segment of the abdomen 
is not quite so bluntly pointed as in the Amblypyg?, bat 
blunter than in the Oxpyg?; it is large, fully two thirds 
the length of the penultimate ; the ovipositor projects. 
This genus seems to be intermediate in some respects 
between the Amblypygt and the Owypygi; the apex of the 
abdomen is not quite so bluntly pointed as in the typical 
Amblyteles, but it is fully developed as in that genus; the 
antenne are pretty much as in the Joppina. Its nearest ally 
is perhaps Setanta of the genera having the mandibles with 
only one apical tooth. Setanta may be known from it by the 
labrum being visible, by the apex of the mandibles being 
blunter, by the occiput not being so deeply excavated; the 
abdomen is longer, being fully twice the length of the thorax, 
whereas in Setanta it is not much longer than it; the apex 
of the femora does not reach to the apex of the third segment, 
while in Setanta the femora reach beyond the sixth. 
Of the four Nearctic and Palearctic genera of Heresiarchini, 
Plagiotrypes, Ashm., may be known from it by the large 
head, strongly concave behind the temples, the “ cheeks 
full, buccate,” and the metathorax bidentate ; Herestarches 
has the metathoracic areola semicircular, smooth, and shining, 
and the gastrocceli are linear and placed longitudinally ; 
Rheawidermus has the scutellum margined laterally to beyond 
the middle, and the thyridia occupy the entire breadth; and 
Stenodontus has the metathoracie, basal, and lateral arez con- 
fluent. Characteristic is the stout tooth on the posterior coxe. 
Myermo rufipes, sp. n. 
Niger, albo-maculatus; pedibus ferrugineis, coxis, trochanteribus 
tarsisque nigris, basi coxarum alba; alis fere hyalinis, stigmate 
testaceo, nervis fuscis. @. 
Long. 13 mm. 
Antenne black, the seventh to eighteenth joints of the 
flagellum white, the apex of the flagellum fuscous, slightly 
compressed, and distinctly narrowed. Head black ; the sides 
of the clypeus, the inner orbits (broader below than above), 
and the lower third of the outer broadly yellow. lace and 
clypeus closely and somewhat strongly punctured, the clypeus 
thickly covered with short silvery pubescence; the lateral 
fovex large; the apex rufous; palpi yellowish, darker at the 
base. Thorax closely punctured; a line on the pronotum, 
extending from near the base to the apex, two small some- 
what ovate marks in the middle of the mesonotum, the 
