No. 22.] 



HYMENOPTERA OF CONNECTICUT. 



21 



NOMENCLATURE OF WING PARTS IN THE DRAWING OF 

 PTERONIDEA RIBESI. 



OLD SYSTEM 







COMSTOCK-NEEDHAM SYSTEM 



Front Wings 



Veins Veins 



Costal Costa 



Subcostal . 











Sc + R + M 



Median 











Cubitus 



Anal 











ist A + 2d A 



Accessory 











3d A and 2d A 



Inferior 











Hind margin (not a vein) 



Radial 











Rs — R3 



Cubital 











M — R4.5 + Ml 



Subdiscal . 











m and M2 



Transverse costal 









SCx 



radial 









Radial cross-vein (r) 



First transverse cubital 







Radio-medial cross-vein (r-m) 



Second " 







Free part of Rs 



Third 







U (( (( T> 



Easal .... 







Medio-cubital cross-vein (m-cu) 



First recurrent 







Ms^ 



Second " 







Transverse part of M2 



First transverse median 







M. + Cux 



-Second " 







Ma 



Transverse lanceolate 







Free part of 2d A 



Cells Cells 



•Costal . . . . . . C and Sci 



Subcostal ...... M 



Median Cu + Cui 



Lanceolate . . .. . . ist A + 2d 2d A and ist 2d A 



Usually the wing area covered 



by 1st A, 2d A, and 3d A 



Anal . . . . . . 3d A, or ist 2d A + 3d A 



Radial 











Ra+2 



Appendiculate 











Appendiculate 



First cubital 











R 



Second " 











Rs 



Third " 











. R4 



Fourth " 











. Ra 



First discal 











M* 



Second " 











ist M2 



Third " 











M3 



First posterior 











. Mt 



Second " 











. 2.d M, 



