430 HYMENOPTERA. 



2. MiMESA Dahlbomi. B.M. 



Mimesa unicolor, Dahlb. Hym. Europ. i. 1. 1 c? ? . 



Psen unicolor, St.Farg. Hym. iii. 44. 4. 



Mimesa Dahlbomi, Wesm. Hym. Foss. Belg. 108. 2. 



Hah. Britain; France; Belgium; Sweden; Lapland. 



This species is here introduced for the first time into the 

 British list. It was detected amongst the examples arranged as 

 M. unicolor in the collection of the late J. F. Stephens, Esq. 



3. Mimesa EauESTRis. B.M. 



Trypoxylon equestre, Fabr. Syst. Piez. 182. 6. 

 Psen rufa, Panz. Faun. Germ.. 96. 17 ? ? 

 Psen equestris, Panz. Krit. Revis. ii. 110. 



Van d. Lind, Obs. ii. 107. 4. 



Curtis, Brit. Ent. i. t. 25 $ . 

 Mimesa equestris, Shuck. Foss. Hym. 229. 1 c? $ . 



Dahlb. Hym. Europ. i. 4. 5. 



Wesm. Hym. Foss. Belg. 109. 3 ? 

 Mimesa Shuckardi, Wesm. Hym. Foss. Belg. 115. 5. 



Hah. Britain ; France ; Germany ; Sweden. 



M. Wesmael has been misled in changing the name M. 

 equestris to M. Shuckardi, supposing the British species to be 

 distinct from the equestris of Fabricius ; this is quite possible, 

 and the examples referred to this species by M. Wesmael are 

 probably distinct; but although Shuckard has not described 

 the petiole so minutely as Wesmael, yet all his characters 

 belong to it : its dorsal surface is flat, shining, and more or less 

 rugose j the lateral faces are bordered by an elevated longitu- 

 dinal lirie, and have also a central carina j beneath, it is flat 

 and slightly hollowed out at its extremity, and the second seg- 

 ment has sometimes an irregularly shaped black spot. 



4. Mimesa bicolor. B.M. 



Psen bicolor, Jurine, Hym. t. 13 (? . 



Mimesa bicolor. Shuck. Foss. Hym. 230. 2 <? $ . 



Wesm. Hym. Foss. Belg. 113. 4. 

 Mimesa lutaria, Dahlb. Hym. Europ. i. 4. 4. 

 Psen equestris, St. Farg. Hym. iii. 43. 3. 



Hab. Britain ; France ; Belgium ; Scandinavia. 



5. Mimesa fraternus. 



Mimesa? hsLternus, Say, Narr.Exped.St.Peter'sRiver,App€nd.73. 

 Hab. Pennsylvania" 



