No. 1774. THORAX OF HYMEN0PTERA—SN0DGRAS8. 87 



Epm, epimerum. 



epm, subdivision of epimerum. 



Epm A, epimeral arm. 



Eps, episternum. 



eps, subdivision of episternum. 



Es, Eu sternum. ^ 



F. femur. 



Fu, furca (entosternum.) 



E, head. 



ISp, first abdominal spiracle. 



IT, first abdominal tergum, called the propodeum in Hymenoptera when transferred 



to thorax. 

 It, subdivision of propodeum {IT). 

 L, leg. 

 M, media. 



m, small median plate or plates of wing base. 

 Mb, "intersegmental" membrane. 

 vi-cu, medio-cubital cross vein. 

 m-m, median cross vein. 

 N, notura. 

 P, parapterum: IP, 2P, first and second or episternal paraptera; SP, 4P, third and 



fourth or epimeral paraptera. 

 PA, pleural arm, process of pleural ridge. 

 Pet, pectus, the sternum and pleura together of any segment. 

 PD, pronator disk. 

 Peps, preepisternum. 



Ph, phragma: iPh, 2Ph, SPh, first, second, and third phragmas. 

 PI, pleuruvi. 



pi, subdivision of pleurum. 

 PN, Postnotum (postscutellum, pseudonotum). 

 pri, subdivision of postnotum. 

 PNP, posterior notal wing process. 

 PNR, posterior ventral notal ridge. 

 pnr, line on surface of notum formed by PNR. 

 Ppct, prepectus. 



Pph, postphragma of any segment. 

 PR, internal pleural ridge (entopleurum). 

 P<S, pleural suture, separating episternum and epimerum along line of internal 



pleural ridge. 

 Ps, presternum. 

 Psc, prescutum. 

 Psl, poetsternellum. 

 Pv, pulvillus. 

 R, radius. 



Rd, posterior reduplication of edge of notum. 

 r-m, radio-medial cross vein. 

 S, sternum. 

 Sc, subcosta. 

 Scl, scutellum. 

 scl, subdivision of ecutellum. 

 Set, scutum. 

 SI, stemellum. 

 Sp, spiracle {iSp, 2Sp, first and second thoracic spiracles; ISp, first abdominal 



spiracle). 

 T, tergum {IT, first abdominal tergum, the propodeum when fused with the thorax). 



