34- Jul >" 



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 pateUata, for in $ patellata the base of 

 the metathorax, although it is not opaque, is not so brilliantly polished 

 as in g ciliata. 



Fabricius, in describing Megilla labiata and fulvipes, 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 

 w r ho have subsequently described Macropis labiata are such that it is 

 evident that more than one European species exists ; yet, on account 

 of the brevity of the Fabrician descriptions, there is nothing at variance 

 with them, excepting locality and the colouring of the hair of the 

 thorax, which Fabricius described as ferruginous. Examining other 

 descriptions, we find that the hair of the thorax has been de- 

 scribed as "ferruginous" in Austria, " fulvous " in Grermany, "pale 

 fulvous" in England, " griseous " in Grermany 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 (? = labiata, Panz.), and have priority, I omit 

 to give a name for Schenck' s species. The labruin, scape, and man- 

 dibles in the male of both the Grerman 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. AVhether 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 

 Swedish 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 tibiae in the male. Schenck 

 has indicated differences in these respects as follows : labiata, Sch., $ , 

 posterior tibiae with white hairs, metatarsus black ; labiata, Fabr., ? , 

 posterior tibiae with white hairs externally, with golden hairs within 

 and beneath, metatarsus brown above, with golden hairs within and 



