PARASITICA ICIiNEUMONID.*. 49 



17.— Teeth of the mimdibles unequal, the lower longest; clypeus truncate at the 



anterior niarjjin ^Acrotomuti Holragr. 



Teeth of the man(lil)le8 nearly alike; c^lypeus broadly rounded anteriorly. 

 Abdomen sessile or subsessile ; tarsal claws almost always pectinate. 



CteniHCUs Hal. 



Abdomen subpctiolate ; tarsal claws simple E.vyMtoii Schiodte. 



18. — Eyes subeniarginate; scape of antenna; thickened, ovate or oblonjj-ovate ; 

 metsithorsvx with oval spiracles; arcolet wanting, rarely present; second 



recurrent nervure generally more or less bent 19. 



Eyes entire; scape of antenna? long, cylindrical ; metathorax with circular 

 spiracles; areolet pentangular, triangular or wanting: stjcond recurrent 



nervure straight Orthocentrut* (Jrav. 



19.— Abdomen petiolate, spiracles of first segment placed behind the middle; 

 areolet present. 



Posterior tibia> with but one apical spur *Mono|>leclron Holnigr. 



Posterior tibise with two apical spurs -^Ischyroenemis Hoimgr. 



Abdomen sessile or subsessile, rarely subpetiolate. spiracles of fli-st segment 

 placed before tlie middle, rarely in the middle; areolet rarely 

 present. 



Metathorax not areolated above Exochoideiii Cress. 



Metathorax areolated above. 



First joint of flagelluni usually more than twice longer tlian wide. 

 Second and following abdominal segments above smooth and polished, 



never carinate ExovhuN Grav. 



Second and sometimes the third abdominal segments above longitu- 

 dinally carinate ChoriiitPiiN Hoimgr. 



First joint of flagellum very short, usually broader than long. 



'^HyperaciniiM Hoimgr. 



Subfamily Pimplin^. 

 Table of Genera. 



Head transverse, cheeks usually not much swollen ; abdomen sessile or snbsessile.2. 

 Head more or less cubical, spherical or subquadrate, more or less extended behind 

 the eyes, the mandibles generally protruding and forming, with the 

 depressed clypeus, a sort of mouth-opening ; abdomen subsessile or sub- 

 petiolate, rarely petiolate 17. 



2. — Abdomen subcompre.ssed (but never so that its dorsum becomes carinate ), and 

 always depressed at base ; the ovipositor arising from the apex of the 



abdomen, the last ventral segment long, lanceolate 3. 



Abdomen distinctly depres.sed, sometimes subcoin pressed towards apex in 9 ••!. 

 '.i. — Areolet triangular, petiolate, receiving the second recurrent nervure at or 

 near its tip; legs and antennse slender; clypeus separated. 



C'oloocentriiN Grav. 

 Areolet wanting. 



Posterior tibife and tarsi long and slender, the tibite almost twice the 

 length of the femora which are somewhat thickened ; antennte slender. 

 n.uch longer than the head and thorax; first submarginal cell either 

 receiving both recurrent nervures, or the second recurrent uniting with 

 the transverse cubital nervure Arotes Grav. 



TRANS. AMKR. ?;NT. SOC. (7) SUPPL. VOL. 1887. 



