350 hymenopteua. 



49. Larra rufipes. 



Bembex rufipes, OUv. Encycl. Meth. iv. 292. 12, 

 Van d. Lind, Obs. ii. 17. 5. 

 St. Farg. Hym. iii. 299. 8. 

 Lucas, Explo. Sc. Alger, iii. 265. 



Hab. France ; Algeria. (Coll. F. Smith.) 



50. Larra ruficornis. B.M. 



Bembex ruficornis, Fabr.Mant.Ins.\.2S6. 9;Ent.Syst.u.252A6. 



OUv. Encycl. Meth. iv. 291. 4. 

 Vespa ruficornis, Vill. Ent. iii. 278. 31. 



Gmelin, Syst. Nat. p. 2769. 159. 

 Stizus ruficornis, Latr. Hist. Nat. xiii. 303. 2. 



Spin. Ins. Lig. i. 7.4. 2. 



Van. d. Lind, Obs. ii. 14. 1. 



Dahlb. Hym. Europ. i. 151. 85. 



St. Farg. Hym. iii. 291. 1. 



Lucas, Explo. Sc. Alger, iii. 264. 



Hab. France ; Germany ; Italy ; Spain ; Albania. 



61. Larra rufocincta. 



Stizus rufocinctus, Dahlb. Hym. Europ. i. 478. 



Hab. Egypt. 



52. Larra Servillii. B.M. 

 Bicyrtes Servillii, St. Farg. Hym. iii. 53. 1. 



Hab. North America. 



An examination of a large number of species of this genus 

 shows the necessity for considerable latitude being given for 

 variation in the neuration of the anterior wings : a slight devia- 

 tion from the type, L. vespiformis, cannot be regarded as of 

 generic value ; and the truncation or hollowing out of the meta- 

 thorax is common to several species ; to this division belong the 

 species L.fuscipennis, affinis, loriculata,fenestrata, argentifrons, 

 and tridentata. A shght difference in the neuration, and the 

 truncation of the metathorax, are the only differences which con- 

 stitute the genus Bicyrtes of St. Fargeau. 



53. Larra succinea. 



Larra succinea, Klug, Symb. Phys. dec. vi. t. 46. f. 3 c? ? . 

 Hab. Egypt. 



