HYMENOPTERA. 429 



4. Pemphredon LUGENS. 



Pemphredou luj^eiis, Dahlh. Disp. Meth. Spec. Hym.\2. 76 ? (? . 

 Zett. Ins. Lapp. 444. 1. 



Hab. Sweden ; Lapland ; Gothland. 



5 Pemphredon annulatus. 



Pemphredon? annulatus. Say, Bost. Journ. i. 379. 2. 



Hab. N. America (Indiana). 



6. Pemphredon concolor. 



Pemphredon? coucolor, Say, Narr. Exped. St. Peter's River, Ap- 

 pend, p. 7'2. 1. 



Hab. Pennsylvania. 



7. Pemphredon marginatus. 



Pemphredon? marginatus, Say, Bost. Journ. i. 379- 1- 

 Hab. N. America ; Pennsylvania. 



Genus 9. MIMESA. 



Tr\T)Oxylon, pt., Fabr. Syst. Piez. 182. 6 (1804). 

 Psen, Latr. Nouv. Did. 2nd ed. 2S (1816). 

 Mimesa, Shuck. Foss. Hym. 228 (1837). 



1. Mimesa unicolor. B.M. 



Psen unicolor, V(in d. Lind, Obs. ii. 105, 3. 

 Mimesa unicolor, SlincJc. Foss. Hym. 231. 3 (? $ . 



Wesm. Hym. Foss. Bely. 108. 1. 



Smith, Cat. Bril. Hym. 41. 3. 

 Mimesa borealis, Dahlb. Hym. Europ. i. 2. 2 ^ $ . 



Hab. Britain; Germany; Belgium; Sweden. 



Dahlbom, in the diagnosis of this species, says that the petiole 

 is carinated above, the cariua being "non sulcata." The examina- 

 tion of a large number of examples shows this to be a variable 

 character : in some specimens of males the channel is scarcely 

 perceptible ; and there can be little doubt of the correctness of 

 Wesmael's oi)inion in regarding the M. borealis as synonymous 

 with M. bicolor. 



