MANUAL OF NATURAL HISTORY. 225 



rent nerve, which unites with the nerve 

 extending between first cubital and ex- 

 ternal discoid cells ; no articulation be- 

 tween second and third dorsal segments of 

 abdomen. 



6. FAMILY. Cuckoo-Flies (Chalcididae). Antennae 

 elbowed, thickened at tips ; palpi short ; man- 

 dibles broad, horny, ending by several teeth ; 

 head transverse ; eyes lateral, often very 

 large ; wings nearly destitute of veins ; ab- 

 domen varied in shape, attached by a pedun- 

 cle, or nearly sessile ; ovipositor usually con- 

 cealed, not longer than abdomen ; hind-legs 

 often toothed and thickened. Pupa naked. 

 Parasitic on other insects. 



1. Chalcidince. Collar transverse, quadrate; 



hind femora thickened. 



2. Eurytomince. Collar transverse, quadrate ; 



hind femora simple. 



3. Pteromalince. Abdomen flat, sessile ; an- 



tennae filiform, fusiform, or clavate; stig- 

 mal branch straight. 



4. Eupelmince. Abdomen flat, sessile ; anten- 



nae filiform, fusiform, or clavate; stigmal 

 branch incurved. 



5. Encyrtince. Collar more or less narrowed 



in front ; antennae with not more than 

 eight joints ; middle legs strongly spurred 



6. Eulophince. Collar more or less narrowed 



in front; antennae with not more than 

 eight joints; tarsi with less than five joints. 



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