Descriptions of Hymenoptera from Baltic Amber. 
9 
whether it could lead direct to Apis. The miocene genus Calyptapis , 
though referred to the Anthophoridae, shows much resemblance to 
Electrapis , and may be allied. 
Electrapis meliponoides. 
5 (or worker). Black, about 14 mm long, with much erect fus- 
cous hair on head and thorax above; clypeus and labrum with scattered 
rather large punctures, and many very minute ones between; width 
of terminal joint of maxillary palpi 51 //; third joint of labial palpi 
204 p long, last joint obliquely truncate, 272 // long; tongue extending 
about, 2125 p beyond end of second joint of labial palpi; fourth an- 
tennal joint very short, much broader than long, third almost as long 
as fourth and fifth together; last joint of flagellum 595 p long and 
289 broad; penultimate joint 425 long; tibiae and tarsi with coarse 
dark fuliginous hair; wings fuliginous; stigma piceous; nervures dark 
brown. 
ö*. Wings not so dark. The following measurements are in micro- 
millimeters r ): antennal joints, length, (2) 119, (3) 238, (4) 170, (5) 459, 
(6 to 13), about 510 each. Length of marginal cell, 2380; length of 
first discoidal cell, 2261; lower side of third submarginal cell, 1020; 
puper side of third submarginal, 493. 
Prussian amber: one male and seven females. 
Frotobombus gen. nov. 
Small (about 10 mm long), with subglobose abdomen; eyes 
apparently not hairy; mandibles Apis-like in shape, obliquely truncate, 
with three notches on the cutting edge; basitarsus broad, as in Apis; 
pulvillus very large; claws with a rather small inner tooth; middle 
tibia with a single very sharp spur, as in Bombus, Apis, etc; scutellum 
elevated, prominent, obtuse, projecting over the rapidly descending 
metathorax (Apis has the sarne, though a little less pronounced); stigma 
obsolete; marginal cell rather long, broad, more or less parallel-sided 
(not cuneiform), with a rounded obtuse end away from costa; three 
submarginal cells, subequal in length; second very broad, pentagona!, 
much longer than third on marginal, and receiving first recurrent 
nervure at or a little beyond end of its first third; first and second 
transverso-cubital nervures about equally oblique, in opposite directions; 
1) It should be stated with reference to these and ot.her microscopic measurements 
given in this paper, that there is a small element of error, arising from the fact that 
the objects measured are rarely precisely at right angles to the line of vision. However 
measurements are not offered of objects placed very obliquely. 
