456 PROCEEDINGS: BOSTON SOCIETY NATURAL HISTORY. 
nae, anteriormost portion of supra-antennal ridges usually, nar- 
row inner orbits above Vjases of antennae; the following parts 
black : a variable area usually along the sides and above the fora- 
men, lateral sutures of occiput, a small spot in the anterior por- 
tion of the frontal fovea, and usually a minute spot outside and 
touching each posterior ocellus, and the fintennae beyond the 
second segment to a variable extent. Head behind eyes some- 
what wider than through them; supra-antennal ridges prominent 
to about half-way toward the anterior ocellus; antennae as long 
as, or slightly longer than, the head and thorax. • 
Thorax. — Ferruginous (tegulae paler, and usually yellow- 
brown); the following parts yellow, or pale yellow: prosternura 
from in part to entirely, ventral face of propleura usually to a 
variable extent, small lower portion of lateral face of propleura 
sometimes, sometimes a small spot on the lower margin of the 
lateral face of the pronotum, the posterior dorsal margin of the 
lobes of collar and usually rather broadly, tegulae sometimes, 
the upper margin of the meso-epimeron in part, the posterior 
mesal portion of the pectus usually (rarely as much as half), 
upper margin of meta-epimeron in part or entirely, and a large 
spot on the meta-episternum ; the following parts black : the whole 
prothorax except the parts named above (and the pronotal lobe 
and usually a small adjacent area which are ferruginous), a small 
spot usually on the anteriormost portion of the present um, a spot 
on the mesoscutum on each side, the meso-epimeron usually to a 
variable extent, the meso-episternum often narrowly along and 
touching the meso-epimeron and sometimes posterior portion 
slightly, and the pectus except small antero-lateral portion (and 
the yellow part named above), metascutum preceding cenchri, 
meta-epimeron, portion of meta-episternum not yellow, and the 
meta-postscutellum at its juncture with the abdomen. Meso- 
scutellum from slightly to moderately convex; meso-episternum 
from rather blunt to moderately pointed. 
Abdomen. — Ferruginous; sides of basal tergum yellowish; the 
following parts black: the basal terga at their junctures narrowly, 
and as a rule the first, second, third and fifth terga on venter. 
Legs. — Ferruginous (tarsi usually paler) ; the following parts 
yellow, or pale yellow: anterior coxae in greater part, the middle 
