1864.] 
383 
the description above quoted, but I have separated it on account of its 
5-jointed maxillary palpi, which excludes it from CheloRtoma. 
Gen. HEEIABEB, Latr. 
‘‘ The labial palpi four-jointed, the basal joint not quite half the length of the 
second, the third and fourth joints minute, placed at the side and near the apex 
of the second joint. The maxillary palpi three jointed, the two basal joints 
stout, the apical joint cylindric, slender and pointed at the apex. The wings as 
in the genus Chelostoma. 
^^This genus only differs from Chelostoma in having two minute apical joints 
to the labial palpi, which are placed near the apex of the second joint at its 
side. Chelostoma has only one minute apical joint, the third being attached to 
the apex of the second, and in a line with it; in other respects they coincide.” 
—Smith, Bees of Great Britain, p. 191. 
The two following species appear to have but three joints to their 
maxillary palpi, and probably belong to this genus. 
1. H. carinatum, n. sp. 
Female .—Head subquadrate, rather large, black, deeply, roughly 
and densely punctured; clypeus prominent on the disk; mandibles 
stout and obtusely bifid at tip; antennae short and black. Thorax con¬ 
vex above, rounded in front, black, shining, deeply and roughly punc¬ 
tured, with scattered pale pubescence; metathorax longitudinally im¬ 
pressed on the disk. Wings subhyaline, the apical half clouded, ner- 
vures black. Legs short, black, sparsely clothed with pale pubescence, 
tarsi clothed with yellowish pubescence. Abdomen elongate, subcy- 
lindric, convex above, slightly narrowed at base, black, shining, deeply 
and uniformly punctured, the punctures smaller and more dense towards 
the tip; apical margin of the segments transversely impressed and nar¬ 
rowly fringed with white pubescence; the anterior face of the basal 
segment deeply concave and bounded above by a rounded carina; apical 
segment rounded; ventral scopa pale yellowish-white. Length 3 lines. 
Male .—Resembles the female, but the head is smaller, transverse 
and clothed in front and beneath with whitish hairs; the antennae are 
almost as long as the thorax; the abdomen is incurved at the apex, 
and the first ventral segment has on its disk a rather large, obtuse 
tubercle; the tarsal claws are bifid and rufo-testaceous. 
Hah. —Conn., Penn. Nine specimens. Coll. Ent. Soc. Phila., and 
Mr. E. Norton. 
