22 



CONNECTICUT GEOL. AND NAT. HIST. SURVEY. 



[Bull. 











Hit 



id Wings 





Veins Veins 





Costal Costa 





Subcostal . 











. R + M 





Median 











Cubitus 





Anal 











Free part of ist A 





Accessory 











Free part of 2d A 





Radial 











. R5— R3 





Axillary . 











. 3d A 





Cubital 











. M — R4H-5 + Ma 





Subdiscal . 











in and M2 





First transverse cubital 







M 





Second " 







. R4 





First recurrent 







Medio-cubital cross-vein 



(m-cu) 



Second " 







Transverse part of M2 





Cells Cells 



' 



Costal C + Sci 





Subcostal . 











M 





Median 











Ms + Cu + Cui 





Lanceolate 











1st A 





Anal 











2d A + 3d A 





Radial 











Rl+2 





First cubital 











R + R4+5 





Second " 











Ra 





Lower discal . 











M4 + 1st M2 





First posterior . 











Ml 





Second " 











2d M2 





HYMENOPTERA. 



Key to Super families. 



A deep constriction at the base of the first abdominal seg- 

 ment,* conspicuously separating the abdomen from the 

 thorax 



No marked constriction at the base of the abdomen, the 

 thorax and anterior abdominal segments being approxi- 

 mately equal in breadth TENTHREDINOIDEA p. 



First abdominal segment * (sometimes also the second) form- 

 ing a lens-shaped scale or knot (petiole), strongly differen- 

 tiated from the remaining abdominal segments (gaster) 



FORMICOIDEA p. 577 



25 



*In all the Hymenoptera the scgrment which is morphologrically the first abdominal segr- 

 ment (propodeum) is intimately fused with the thorax, of which it seems to be a part. In 

 this work the general usage of descriptive writers is followed, and the segment which is 

 apparently the first abdominal segment, though morphologically the second, is uniformly 

 called the first abdominal segment. 



