Descriptions of Hymenoptera from Baltic Amber. 7 
Bombus pusillus Menge is very small, scarcely 3 mm long, and 
has yellowish-white hair. 
Apis meliponoides Buttel -Reepen is principally known by the 
structnre of the hind basitarsus, which is figured. The posterior apical 
angle, instead of being rounded, is pointed, as in Bombus. 
Bombus pusillus is not like anything I have seen; it cannot be 
a Bombus. B. carbonarius may be identical with one of the smaller 
species in the collection before me, and the same may be said of Apis 
proava , but it is quite impossible to recognise either from the des- 
cription. Apis meliponoides I have recognised, but it is not a member 
of the genus Apis. 
The bees from Prussian amber may be divided into two groups, 
those with three submarginal cells, and those with two. 
Group A. With three submarginal cells in the anterior wings. Basal 
nervure meeting transversomedial. Eyes without hair. 
Larger bees, about the size of the honey-bee; 
hind basitarsus about twice as long as 
broad; posterior tibiae with a single short 
spur; second submarginal cell receiving first 
recurrent nervure a little before the middle. 
Smaller, more compact bees, hind basitarsus short. 
Third submarginal cell much produced 
apically; second submarginal cell receiv- 
ing first recurrent nervure much before 
the middle. 
Third submarginal cell ordinary; second 
submarginal cell receiving first recurrent 
nervure beyond the middle. 
Electrapis n. g. 
Protobombus n. g. 
Chalcobombus n. g. 
Electrapis gen. nov. 
5 (or worker). General appearance very like that of Apis, not 
like Bombus ; face convex; mandibles truncate, much as in Apis, but 
the cutting edge with two notches; 1 ab rum semicircular; tongue 
elongate, it and the labial palpi essentially as in Apis ; spoon on end 
of tongue small; maxillary palpi very small, thick, apparently 2-jointed; 
malar space very short; anterior edge of clypeus straight; scape rather 
long, curved; antennae (as also the head) much as in Apis\ eyes pro- 
minent, not hairy; ocelli large, in a slightly curved line; posterior and 
middle tibiae each with one sliarp broad simple spur, but that of 
