HYMENOPTERA. 3^3 



xilyson spinosus, St. Farg. c^ Serv. Encycl. Meth. x. 50. 4. 



Van d. Lind, Obs. ii. 89. 3. 



St. Farg. Hym. iii. 87. 2. 

 Alyson bimaculatus, Dahlb. Hym. Europ. i. 146 (var.) & 474. 



Wesm. Hym. Foss. Belg. 99. 2 (var.?). 



Hab. France; Germany. 



The examples of this species in the Collection of the British 

 Museum are very distinct from those of ^. bimaculatus; the 

 sculpture of the metathorax is very diiferent, and the females 

 have a vrhite scutellum. 



2. Alyson tricolor. B.M. 



Alyson tricolor, St. Farg. 8f Serv. Encycl. Meth. x. 50. 4. 

 Van d. Lind, Obs. ii. 90. 4. 

 St. Farg. Hym. iii. 89. 5. 

 IVesTU. Hym. Foss. Belg. 98. 1. 



Hab. France; Germany; Belgium. 



3. Alyson bimaculatus. B.M. 



Sphex fuscata, Panz. Faun. Germ. 51. 3. 

 Alyson bimaculatus, Jurine, Hym. 196. 



Panz. Krit. Revis. ii. 170. 



Van d. Lind, Obs. ii. 88. 2. 



Dahlb. Hym. Europ. i. 142. 76 & 474. 



St. Farg. Hym. iii. 88. 3 ? . 



Wesm. Hym. Foss. Belg. 99. 2. 

 Alyson fuscatus, Panz. Krit. Revis. ii. 171. 



St. Farg. Hym. iii. 58. 4. 



Hab. France; Germany; Belgium. 



4. Alyson melleus. 



Alyson melleus. Say, Bost. Journ. i. 380. 2. 

 Hab. N. America (Indiana). 



5. Alyson oppositus. 



Alyson oppositus, Say, Bost. Journ. i. 380. 1, 

 Hab. N. America (Indiana). 



Genus 11. DIDINEIS. 



Pompilus, pt., Fabr. Ent. Syst. Supp. 249 (1798). ' 



Alyson, pt., Latr. Gen. Crust, et Ins. iv, 86 (1809). 

 Didineis, Wesm. Hym. Foss. Belg. 96. 



