Descriptions of Hymenoptera from Baltic Amber. 
13 
170 thick, the last joint 323 y long; distance between eyes in region 
of ocelli 1428 «; distance between lateral ocelli and eyes 289 p; 
scntellum conspicnously projecting, but the edge (seen in lateral profile) 
rounded ; legs with much coarse fuscous hair; pulvillus large; claws 
with a strong inner tootli ; wings reddisli-fuliginous. 
Front wings: venation essentially as in C. humilis; first recurrent 
nervure joining second submarginal cell about twice as far from base 
as from apex, the basal corner of the cell being produced; third sub- 
marginal cell much longer than second, about 680 y long, and narrowed 
more than half above, that is, to about 272 y on marginal; basal 
nervure meeting transversomedial. 
Hind wings: transversomedial 153 y long, with 
the upper half straight (vertical), and the lower 
somewhat deflected (25 y) basally. Costal hooks 
eleven (in the type of C. humilis there are eight 
costal hooks.) 
Prussian amber. 
Fig. 8. Chalcobombus 
hirsutus Ckll. 
Tranversomedial nervure 
of bind wing. 
Group B. With two submarginal cells in the anterior wings . Small bees. 
Eyes hairy . . . Glyptapis m g. 
Eyes bare . . . Ctenoplectrella n. g. 
Glyptapis gen. nov. 
Small dark-colored bees, with hairy eyes; mandibles broad, with 
a long cutting edge, which is strongly notched near the apex; tongue 
rather broad, short, with a button-like terminal structure; labial palpi 
4-jointed, the first two joints elongated, the second much longer than 
the first; maxillary palpi 4-jointed; claws with an inner tooth; pulvillus 
large; thorax strongly sculptured, the metathorax divided by ridges 
into large subquadrangular areas; stigma distinct; marginal cell pointed 
at end; two submarginal cells, the second receiving both recurrent 
nervures; basal nervure meeting, or almost meeting, transversomedial; 
transversomedial of hind wings oblique, the lower end more basal. 
In Cresson’s table of North American genera this runs exactly 
to Coelioxys, but except for the hairy eyes, it has little resemblance to 
that genus. So far as I can judge, Glyptapis and Ctenoplectrella stand 
near the stem-form of the Megachilidae, but so remote from the modern 
members of that group that they at least form a distinct subfamily, 
Glyptapinae. Their nearest relative in the modern fauna appears to 
be Ctenoplectra — a genus which has always been difficult to place 
in the System. In Glyptapis fuscula the ventral side of the abdomen 
