150 SEVENTEENTH Report STATE ENTOMOLOGIST OF MINNESOTA—1918 
In the following pages the order is divided into two groups, the 
Chalastogastra, represented by the first ten families, all included in the 
one superfamily Tenthredinoidea and the Clistogastra, which embraces 
all the remaining superfamilies. 
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+2nd A 
Accessory 3d A and 2d A 
Inferior Hind margin (not a vein) 
Radial Rs—R, 
Cubital M—R,+,+M, 
Subdiscal m and M, 
Transverse costal Sc, 
Transverse radial Radial cross-vein (7) 
First transverse cubital Radio-medial cross-vein (7-m) 
Second transverse cubital Free part of R; 
Third transverse cubital Free part of R, 
Basal Medio-cubital cross-vein (m-cu) 
First recurrent M3t, 
Second recurrent Transverse part of M, 
First transverse median M,+Cu, 
Second transverse median M, 
Transverse lanceolate Free part of 2d A 
Cells Cells 
Costal Grandesc; 
Subcostal M 
Median Cu+Cu, 
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 Rit. 
Appendiculate Appendiculate 
First cubital R 
Second cubital Re 
Third cubital R, 
Fourth cubital R,; 
First discal M, 
Second discal Ist M, 
Third discal M,; 
First posterior M, 
Second posterior 2d M,; 
