10 
T. D. A. COCKERELL. 
third submarginal cell oblique, produced apically, narrowed much more 
than half above, receiving the second recurrent nervure one sixth or 
a little more from end; first recurrent nervure with a bend or angle 
in its upper part, and a little appendiculation at this point; second 
recurrent gently bowed outwards; first discoidal cell not so long as 
marginal; basal nervure meeting transversomedial; lower section of 
basal nervure more than twice as long as upper; trans versomedial of 
hind wing strongly oblique, the lower end more basal. 
Type Protobombus indecisus sp. nov. 
Apis differs from Protoboynbus by: 
(1.) The hairy eyes. 
(2.) The longer marginal cell. 
(3.) The apex of second submarginal cell much more produced (so 
also in the fossil subgenus Synapis). 
(4.) Basal nervure not nearly reaching transversomedial. 
(5.) Basal nervure in hind wings oblique, with its lower end most 
apical (A. mellifera and äorsata), or practically vertical 
(A. florea). 
Bornbus differs from Protobombus by: 
(1.) The produced apical corner of second submarginal cell. 
(2.) The apex of third submarginal cell little produced. 
They agree, however, in the transversomedial of hind wings. 
Protoboynbus cannot be described so fully as Electrapis, tlie 
hind spurs and the mouth-parts not being visible, and the male unknown. 
It doubtless Stands much nearer to Bomtjus than to Apis, and may 
well be directly ancestral to the former. 
Protobombus indecisus sp. nov. 
J. Black, about 10 mm long (the exact length 
is hard to determine, owing to the position of the 
insect); abdomen brownish basally, with sparse pale 
hair; thorax and occiput quite densely covered with 
rather short white or yellowish-white hair, which 
is very finely plumose; no dark hairs are intermixed; 
legs black, hind femora a little brownish; hair of legs 
mostly pale, but fuscous or black on inner side of 
tarsi, and hind tibiae with long dark hairs; tegulae very dark brown, 
moderate in size, with sparse small pale hairs; wings rather light 
fuliginous, with a very dark fuliginous cloud (such as is seen in some 
Boyyibus) at the end of the marginal cell. 
Füg. 5. Protobombus 
indecisus Ckll. 
Plumose hairs from pen- 
ultimate dorsal segment 
of abdomen. 
