194 



TABLE OF GENERA AND SPECIES HERE 

 CONSIDERED. 



1 (6) Alxlomen sessile, with a wide thoracic mesophragma 



extending- well into it ; front wings very narrow, the 

 apical cilia much longer than their width. 



2 (3) Tarsi 5-jointed (antennae of male lo-jointed; of female 



8-jointed) Alaptus iuwialunis. 



^ (2) Tarsi 4-jointed (antennae of male 13, of female 9-joint- 

 ed.) 



4 (5) Third antennal joint elongate almost as long as the 



fourth Paranagrus. 



Ovipositor only slightly exserted behind the body. 



P. optabilis. 



Ovipositor exserted behind the body for a length 

 equal to that of the 4 joints of the hind tarsi together. 

 P. perforator. 



5 (4) Third antennal joint very short, much shorter than 



fourth Anagrus. 



Front wings with a distinct bare longitudinal line on 



lower half A. frcquens. 



Front wings more evenly hairy (PI. 'XllI fig. 8 & 8a.) 

 -. A. columbi. 



6 (i) Abdomen pedicellate ur subpetioiate, and without a 



mesophragma extending back into it ; front wings 

 with the apical fringe short, much shorter than the 

 width of the wings. 



7 (8) Tarsi 5-jointed; antennae of female ii-jointed. 



Abdomen j)edicellate Ooctoiins ausiralciisis. 



Abdomen not pedicellate Goiiatoccrus cingiilatiis. 



8 (7) Tarsi 4-ijointed, antennae of female 9-jointed. 



Abdomen pedicellate Polyncma rcduvwli. 



DESCRIPTION OF GENERA AND SPECIES. 



In the following descriptions important structural characters 

 are generally given under the generic names, owing to the fact 

 that I do not feel sure that the species are always placed in the 

 right genera, for reasons that I have already stated. The neu- 

 ration does not differ greatly in these genera, being much as in 

 the Paranagrus figured, though in some forms the sub-marginal 



