364 



glabrous, with distinct notauli ; metanotura usually with two 

 transverse carinae, sometimes centrally obsolete, and rarely with 

 the discal area? entire. Scutellum, at least basally, carinate at the 

 sides. Abdomen strongly compressed, petiolate, with the basal 

 segment narrow and its spiracles beyond the centre ; second seg- 

 ment shorter, with deeply impressed thyridii ; terebra shortly 

 exserted. Legs elongate and slender, with the tarsi often paler. 

 Wings ample, with the basal and discoidal nervures distinctly 

 convergent ; first cubital geniculate below, usually with a distinct 

 nervelet ; parallel nervure emitted above ; nervellus intercepted at 

 or below its centre ; tirst abscissa of radius basally curved and 

 longer than the recurrent nervure in hind wing. 



Range. World-wide. 



One or two species, described by the older authors under this 

 generic name, are still treated of here, though their true position, 

 at present unknown, is certainly elsewhere. 



Table of Speties. 



1 (20) Thorax and head not entirely black. 

 2 (19) Antennae not entirely black." 



3 (10) Second recurrent nervure not emitted 



opposite apex of basal radial abscissa. 



4 (9) Second recurrent emitted before apex 



of basal radial abscissa. 



5 (8) Petiolar area not laterally cariuate ; 



length over 15 millim. 



6 (7) Apophyses normal, not elongate .... luteus, L., p. 365. 



7 (6) Apophyses both acute and elongate . . dentatus, Smith, p. 360. 



8 (5) Petiolar area entire^and discrete ; length 



under lf> millim areolatus, Cam., p. 366. 



9 (4) Second recurrent emitted beyond apex [p. 367. 



of basal radial abscissa bicarinatus, Cam., 



10 (3) Second recurrent emitted opposite apex 



of basal radial abscissa. 



11 (16) Head posteriorly normal. 



12 (13) Basal nervure con tinuous ; inner cubital 



basally straight carinatus, Cam., p. 368. 



13 (12) Basal nervure not continuous ; internal 



cubital nervure basally curved. 



14 (15) Mesonotum not infuscate ; scutellum 



basally carinate aaiaticus, Kok., p. 3G9. 



15 (14) Mesonotum discally infuscate ; scu- [p. 369. 



tellum not carinate fuscomaculatus, Cam., 



16 (11) Head posteriorly buccate. 



17 (18) Head, thorax and abdomen broadly [p. 370. 



white-marked albopictus, Smith, 



18 (17) Head, thorax and abdomen not white- 



marked jeWrtwz',Cam.,p.371. 



19 (2) Antennae entirely black yenerator, F., p. 371. 



20 (1) Thorax and head entirely black trianyularemaculatux, 



[Mots., p. 372. 



It is hoped that the above table will be found of use in the 



