62(3 MR. R. E. TURNER OX 



86. PiSON INSULARIS .Sill. 



Pison insularis Sm. Trans. Ent. Soc. London, p. 297 

 (1869), ?. 



Very near priscum Turn., but differs as pointed out undei- 

 that species. The second ventral segment is sliining and smooth. 



JIab. New Hebrides. 



*87. Pison glabrum Kohl. 



Pison glabrum Kohl, Denkschr. Akad. Wiss. "Wien, Ixxxi. 

 p. 309(1908), $. 



This seems to be very near insnlaris in sculpture ; but the 

 wings are inf uscate : and either the eyes are further apart on 

 the vertex or the basal joints of the flagellum are shorter. 



ffah. Upolu, Samoa (Rechinger). 



*88. Pison strictifrons Yachah 



Pison strictifrons Yachal, Revue d'Entom. xxvi. p. 114 

 (1907), 2. 



A much smaller species than insularis, though agreeing with 

 it in nearness of the posterior ocelli to the eyes and in the 

 smooth median segment. The description is very insufficient. 



Hah. New Caledonia. 



? '89, Pison imptfnctatum Turn. 



Pison impmictatum Turn, Ann, & Mag. Nat. Hist. (8) ix. 

 p. 200 (1912), $ . 



Probably closely allied to strictifrons, also to iridipennis Sm. 

 From the latter it differs in the lesser distance between the eyes 

 on the vertex and the smoother median segment. 



Hah. New Guinea {Wollaston). 



^ 90. Pison iridipennis Sm, 



Pison iridipennis Smith, Journ. Linn. Soc, Zool. xiv. p. 676 

 (1879), (5; Smith, Descr. New Spec. Hymen, p. 139(1879), S ■ 

 Hah. Hawaii; Koolau, July ; Samoa. 



91. Pison tuberculatus Sm. 



Pison tuhercidatus Sm. Trans. Ent. Soc. London, p. 296 

 (1869), cJ. 



A small species closely allied to iridipennis, but whereas that 

 species has in the male a short transverse ridge on the third 

 ventral segment and a similar but less distinct ridge on the 

 fourth, tuhercidatus has a rounded tubei'cle on each side of tlie 

 third ventral segment and a similar but less distinct tubercle on 

 each side of the second and fourth. 



Hah. New Zealand. 



