356 HYMENOPTERA. 



12. NySSON? MARGINATUS, 



Nysson marginatus. Spin. Ann. Soc. Ent. Fr. x. 113. 68. t. 3. 

 f. 11 (1841). 



Hab. Cayenne. 



13. Nysson rufo-pictus. B.M. 



Female. Length 4 lines. — Head and thorax black ; the cly- 

 peus, mandibles, scape, and five or six of the basal joints of the 

 flagellum, ferruginous. Thorax : the collar, tubercles, a large 

 spot beneath the wings, the tegulae and posterior angles of the 

 mesothorax, the scutellum, post-scutellum, and tips of the spines 

 which arm the metathorax and the legs, ferruginous ; the lateral 

 angles of the metathorax covered with silvery pubescence. 

 Abdomen ferruginous ; the basal margin of each segment has a 

 central triangular black spot, the entire margin of one or two of 

 the basal segments is also narrowly black, with angular black 

 spots at the sides ; beneath, the third, fourth and fifth segments 

 are black. 



Hab. ? 



14. Nysson aurinotus. 



Nysson aurinotus. Say, Bost. Journ. i. 368. 

 Hab. N. America (Indiana). 



15. Nysson Gayi. 



Nysson Gayi, Spin. Gay's Chili, vi. 347. !• 

 Hab. Chili. 



Genus 5. SERICOPHORUS. 



Sericophorus (Shuck. MSS.), Smiik, Ann. S)- Mag. Nat. Hist. 



2ndser.vii. 32(1851). 

 Tachyrrhostus, Sauss. Mem. Soc. Phys. Geneve, fasc. 1. 24(1854). 



1. Sericophorus chalybeus. PI. IX. fig. 1. B.M. 



Sericophorus chalybeus, Ann. d)- Mag. Nat. Hist. 2nd ser. vii. 32. 

 Tachyrrhostus cyaneus, Sauss. Mem. Soc. Phys. Geneve, fasc. 1 . 

 26. 14. 



Hab. Australia. 



2. Sericophorus viridis. 



Tachyrrhostus viridis, Sauss.Mem.Soc.Phys. Geneve, fasc. 1 . 25. 13. 

 Hab. Australia. 



