1922 ] 
Synopsis of Panurgidce 
159 
SYNOPSIS OF PANURGIDCE (. HYMENOPTERA ). 
By Charles Robertson. 
Carlinville, Illinois. 
My synopses of local bees are intended to show how I 
distinguish them. It is assumed that the student has only the 
local species and all of them. Nothing follows from such a 
statement as that Chloralictus nymphalis runs to C. teslaceus 
in my table of Halictinae. If it had been one of the local species, 
it would not have run to that name. 
The differences between the Panurgidse and Dufoureidse 
are partly mentioned in the “Synopsis of Anthophila”, Can. 
Ent. 86 : 42, 1904. The local species mix the pollen with honey, 
but Panurgus evidently does not. It has a large scopa which 
is not necessary in those which stick the pollen with honey. 
Often the two cubital cells are not homologous, so that the 
bees are referred here on account of other resemblances. In 
Perditinse the cubital cells are the first and third, the second 
being obliterated by coalescence of the first and second transverse 
cubital nervures. The “first transverse cubital” is a compound 
vein, and the “second” is really the third. Usually in the rest 
of the Panurgidse the true second transverse cubital vein is 
wanting and the one called “second” is the third. The “second 
cubital cell” is composed of the second and the third united. 
I have a specimen of Pseudopanurgus compositarum with three 
cubital cells. In true Panurginus I think the first and second 
cubital cells are united and that the venation is not homologous 
with that of American species which have been referred to that 
genus. I have seen P. albopilosus and montanus, determined by 
Friese. These have an independent origin from forms having 
three cubital cells. . 
Abbreviations. — lp 1 = basal joint of labial palp; lp 4:2 = 
length of first and second joints as 4 to 2; Ma, Mas = long-tongued 
bee flowers; Mi, Mis =short-tongued bee flowers; mp 6 = 
maxillary palps six-jointed; oligolege = bee collecting pollen 
