﻿I30 



(For figures of ptiparia see PI. \'ll, fig. 3, 4, 5. 5a, 5I), 6, 7, 8 

 and 9). 



CLASSIFICATION. 



Verrall divides the British species of Pipiiiiculiis, which are 

 fair representatives of the European forms, into five groups. 

 Three of these have a pigmented stigma and are cHvided as fol- 

 lows: 



I. Abdomen quite dull, not even the margins shining, femora 



without anv ciliation or pubescence behind. 



II. Abdomen partly shining; femora ciliate or pubescent at 



least behind the middle pair; thorax and scutellum with 

 dense but short pubescence. 



III. Thorax and scutellum practically bare, as well as the 



femora; the abdomen considerably shining-. 

 The other groups are without a pigmented stigma and are 

 separated thus: 



IV. Small or discal cross-vein far before the middle of the 



discal cell, eyes freque!Ttly not ciuite touching on the 

 Irons in the male. 



V. Small cross-vein placed at or about the middle of the discal 



cell. 

 Both the Australian and Hawaiian species known to me 

 divide into stigmated and non-stigmated sections, but the fur- 

 ther division into groups on the characters used by Verrall is 

 not very satisfactory, if indeed possible, with the species here 

 considered. In the following table I have therefore used other 

 characters for the groups. 

 Wings with a pigmented stigma. 



Stigma not bounded by a cross-vein at the base. 



Third antennal joint sharplv pointed at the tip, usually 

 acuminately produced. 

 Basal abdominal segment with some black bristles on 



each side 1 



Basal abdominal segment with no trace of such l)rist!es, 

 and if pubescent, then the hairs similar to the general 



clothing II 



Third antennal joint rounded at tip, or at least not acute, 



and never acuminately produced Ill 



Stigma bounded by a distinct cross-vein at the ])ase l\' 



Wings without a pigmented stigma. 



