530 CONNECTICUT GEOL. AND NAT. HIST. SURVEY. [Bull. 



NOMENCLATURE OF WING PARTS IN THE DRAWING OF 



SERPHUS CAUDATUS. 



COMSTOCK-NEEDHAM SYSTEM 



Veins 

 M and m-cu 

 Media and at wing margin R*+ 



+ Mi 

 R and r-m 

 M w 



Cells Cells 



First submarginal . . . 1st Ri + R 

 Fused cells beyond 1st sub- 

 marginal .... Rs+4+ 



Marginal (reduced to a minute 

 area beyond the stigma) . 2d Ri+R* 



Key to Families. 



1. Trochanters with one joint; antennae with fourteen joints; 



mandibles without teeth; stigma very narrow, long 



PELECINID^ p. 576 

 Trochanters with two joints, or stigma very short and broad 2 



2. Antennae inserted into middle of face 3 



Antennae inserted below middle of face at junction of clyp- 



eus with face 5 



3. Wings present 4 



Wings wanting 10 



4. Front wings with a more or less distinct stigma 12 



Front wings never with a more or less distinct stigma 11 



5. Wings present 8 



Wings wanting 6 



6. Abdomen with sides acute or margined 7 



Abdomen with sides rounded CERAPHRONID^E p. 557 



7. Labial palpi with one joint PLATYGASTRIDiE p. 531 



Labial palpi with two or more joints . . . .SCELIONID^E p. 541 



8. Abdomen with sides acute or margined 9 



Abdomen with sides rounded; antennae in female with ten 



or eleven joints, in male with eleven joints 



CERAPHRONID^: p. 557 



9. Antennae with ten, eight, or nine joints; no marginal or 



stigmal vein PLATYGASTRIDyE p. 531 



Antennae with twelve, eleven, or seven joints (rarely with 

 ten joints, in which case either the wings bear a large 

 stigma and the entire abdomen is longitudinally striated, 

 or the marginal and stigmal veins are present) 



scelionid;e p. 54* 



10. Labial palpi with two joints DIAPRIID^ p. 561 



