FOSSORIAL WASPS. (519 



carina only visible at the base, the sides of the segment outside 

 the triangular area finely and irregularly striated ; the posterior 

 slope more distinctly transversely striated, with a rather indis- 

 tinct median sulcus. Abdomen microscopically punctured, 

 without fascia? of pubescence ; the first segment rather strongly 

 depressed at the apex, the ventral surface evenly and much more 

 distinctly punctured ; the seventh ventral segment very shallowly 

 emarginate at the apex. Second cubital cell almost pointed on 

 the radius, first transverse cubital nervure a little nearer to the 

 first than to the second recurrent nervure, transverse median 

 nervure received before the basal nervure. 



Hah. Zungeru, N. N'igeria {J. W. Scott-Macfie), November. 



This is very distinct from xanthopus in the sculpture of the 

 median segment as well as in the neuration, also in the structure 

 of the apical ventral segments. 



60. PiSON ARGENTATUS Shuck. 



Pison (Pisonitus) argentatus Shuck. Trans. Ent. Soc London 

 ii. p. 79 (1837). . ' 



Pison fusci2Kd'pe Cam. Proc. Zool. Soc. London, ii. p. 27 (1901). 



Pisonitus argenteus Ashm. Proc. U.S. National Mus. xxviii' 

 p. 131 (1904). 



_ This is a very wide-ranging species, and the original habitat 

 IS doubtful. In recent years it has been imported into Hawaii, 

 w-here it has increased rapidly, apparently to the detriment of 

 the indigenous species. There seems to be some slight variation 

 m the intensity of the sculpture of the median segment, but 

 nothing of specific importance. 



ffab. Mauritius (S/mckard), type; Madagascar (Saussitre) ; 

 Kangoon_ {Bmghmn), April ; Amherst, Tenasserim {Bingham), 

 April ; Singapore {Cmneron) ; Borneo {ex coll. Cameron) ; Bacoor 

 Philippines {Ashmead) ; Oahu, Hawaii {Perkins), July. ' 



61. Pison rugosus Sm. 



Pison {Pisonitus) rugosus Sm. Oat. Hym. B. M iv p 313 

 (1856),$. ' ' ^' 



Pison appendiculatum Cam. Mem. Manchester Lit & Phil 

 Soc. xli. 13, p. 24 (1897). 



Easily distinguished from argentatus, the only other Oriental 

 species of the Pisonittis section, by the much coarser punctura- 

 tion of the head and thorax and the stronger constriction of 

 the abdominal segments. Intermediate in neuration between 

 Pisonitus and Pison. 



Hah. N.W'. Provinces of India, throughout N.E. India and 

 Burma ; Poona, W. India. 



62. Pison ater Spin. 



Alyson ater Spin. Ins. Lig. ii. 4, p. 253 (1808), $ . 

 Pison jurini Spin. Ins. Lig. ii. 4, p. 256 (1808), J . 



43* 



