HYMENOPTERA. 355 



chalceous pile ; the clypeus and base of the mandibles yellowish- 

 white ; on the clypeus anteriorly is a triangular black" spot, the 

 tips of the mandibles rufo-piceous, the scape in front and one 

 or two of the basal joints of the flagellum ferruginous ; the rest 

 of the flagellum is fusco-ferruginous beneath. Thorax : an in- 

 terrupted line on the collar, the tubercles and a transverse line 

 at the base of the scutellum, yellow ; the tegulae, posterior angles 

 of the mesothorax and the le*gs ferruginous ; the coxae and tro- 

 chanters black, except at their apex ; at the base of the meta- 

 thorax a coarsely reticulated enclosed space ; the lateral angles 

 spinose and covered with silvery pubescence. Abdomen : the 

 four basal segments have laterally an oblong subovate pale yellow 

 macula ; the abdomen is finely punctured above and strongly so 

 beneath. 



Male. Very closely resembles the female, but has the clypeus 

 immaculate, the scape and basal joint of the flagellum yellow in 

 front, and the abdomen has two additional spots on "the fifth 

 segment. 



Hab. Albania. (CoU. S. S. Saunders, Esq.) 



9. NYSSON DECEM-MACULATUS. 



Nysson decem-maculatus, Spin. Ins. Lig. ii. 41. 

 Van d. Lind, Obs. ii. 33. 5. 

 Dahlb. Hym. Europ. i. 171. 104. 



Hab. Italy. 



10. NYSSON ABDOMINALIS. 



Nysson abdominale, Guer. Icon. Reg. Anim. iii. 441. 

 Hab. Senegal. 



11. NYSSON BASALIS. 



Male. Length 4 lines. Black : the face thinly covered with 

 silvery pubescence ; the apical joint of the antennae rufo-testa- 

 ceous ; the head and thorax rugose ; the posterior angles of the 

 metathorax covered with silvery pubescence ; the wings fusco- 

 hyaline. The base of the abdomen covered with silvery pile ; at 

 the lateral apical margins of the four basal segments an elongate, 

 subovate, yellowish-white macula, each in succession smaller 

 than that on the basal segment; sometimes a minute one on the 

 fifth segment; the lateral apical margins of the sixth and seventh 

 segments produced into acute spines, the apical margin of the 

 seventh segment rounded. 



Hab. India. (CoU. W. W. Saunders, Esq.) 



