which present no such development of characters as the males, may be 
undistinguishable. The males must be considered typical of the species. 
But it may be that the first form of the $ described above, under 
ciliata, belongs in reality to patellata , for in f patellata the base of 
the metathorax, although it is not opaque, is not so brilliantly polished 
as in <f ciliata. 
Fabricius, in describing ALegilla labiata and fulvipcs, gave no 
differences between them, excepting such as are now known to be sexual. 
The points of difference which appear in the descriptions of authors 
who have subsequently described JSIacropis labiata are such that it is 
evident that more than one European species exists ; yet, on account 
of the brevity of the Eabrician descriptions, there is nothing at variance 
with them, excepting locality and the colouring of the hair of the 
thorax, which Eabricius described as ferruginous. Examining other 
descriptions, we find that the hair of the thorax has been de- 
scribed as “ferruginous” in Austria, “ fulvous ” in Germany, “ pale 
fulvous” in England, “griseous” in Germany and Scandinavia, 
“ cinereous ” in Finland. The German species, with fulvous thorax, 
Schenck called fulvipes , Fabr., that with griseous thorax he called 
labiata ; but, labiata , Fabr., and fulvipes, Fabr., being the same, unless 
a re-examination of the types proves them distinct — and, in that case, 
Schenck has transposed the names — Schenck’ s labiata requires a new 
name. The descriptions of the French species by Latreille and 
Dufour I have not at hand, and, consequently, cannot determine the 
relationship of Andrena lagopus , Latr. Lest it should prove to be the 
same as labiata , Schenck (P = labiata , Panz.), and have priority, ] omit 
to give a name for Schenck’s species. The labrum, scape, and man- 
dibles in the male of both the German species have been described as 
black. In Sweden, the labrum and a spot on the mandibles are yellow ; 
in England, a spot on the scape and a spot on the mandibles are 
yellow. Whether these differences indicate distinct species can only 
be determined by the study of more essential characters in the European 
species. The colouring of the labrum is a specific character in separa- 
ting the American species. The descriptions of the English and 
Sw'edish authors afford no characters in regard to the delicate 
puncturing of the abdomen, the colouring of the posterior legs in the 
female, and the armature of the posterior tibia? in the male. Schenck 
has indicated differences in these respects as follows : labiata , Sch., 5 , 
posterior tibiae with white hairs, metatarsus black ; labiata , Fabr., 5 , 
posterior tibiae with white hairs externally, with golden hairs within 
and beneath, metatarsus brown above, with golden hairs within and 
