18 GENERA OF HYMENOPTERA. 



The genera belonging to these tribes are tabuhited jus follows : 



Anterior wings with one radial cell 2. 



Anterior wings with two radial cells 9. 



2.— Aiitenna> with only three joints .'..3. 



Antennffi9-jointed 5. 



Antenna? serrate, with more *.han nine joints, flahellate in % 8. 



3. — Anterior wings with an appendicular cell; posterior tibia* with a spine; 



% antcnnte simple Hylotoma I^itr. 



Anterior wings without ai)pendicular cell ; posterior tibia? without spine ; 



% antennte cleft 4. 



4. — Lanceolate cell i)etiolate Schizocera Latr. 



Liinceolate cell contracted ■Cypiiona Dahll). 



5. — Lanceolate cell contracted (}. 



Lanceolate cell petiolate 7. 



6. — Third cubital cell receiving the second recurrent nervure Cladius Illig. 



Second cubital cell receiving the second (and first) recurrent nervure. 



•Camponlscus Xewiii. 

 7. — Posterior tibite at apex and base of tarsi broadly expanded and Hatteiud. 



Croesus Leach. 

 Posterior tibiae and tarsi simple, not compressed or dilated. 

 Three or four cubital cells, if three the first receiving both recurrent ner- 



vures Nematus Paiiz. 



Three cubital cells, the second receiving both recurrent nervures. 



Euura Xewm. 



8. — Lanceolate cell divided by an oblique cross-nervure Lophyrus I^atr. 



Lanceolate cell contracted in the middle Monoctenus Dahlb. 



9.— Three cubital cells 10. 



Four cubital cells 18. 



Three cubital cells; antennse Ti-jointed, the third joint very long. 



Pinicola Hreb. (=A'i/e/rt.) 



10.— (Antennae 4-jointed "Blasticotoma Klug.) 



AntennsE 5-6 jointed, davate 11. 



Antennae 7-8 jointed, not clavate •■■CcBnoneura Thoius. 



Antennse 9-jointed 14. 



Anteunse 10-16 jointed 17. 



11.— Antennae .5-jointed. 



Posterior coxae toothed ; blotchf absent, body hairy.. Trichlosoma Leach. 

 Posterior coxse not toothed, blotch present, body not hairy. .Cimbox Oliv. 



Antennae 6-jointed 12. 



12. — Lanceolate cell with a straight cross-nervure ■*Clavellaria Oliv. 



Lanceolate cell contracted 13. 



* Genera prefixed I'V an asterisk are a.s yet without any described representa- 

 tives in our fauna. 



t "The separation of the abdomen from the f<, ..'•th thoracic segment (meta- 

 thorax) is usually marked by a transverse incision, covered with a white mem- 

 brane, which, with Cimhex and many other genera, is very conspicuous, and is 

 called the blotch {nuditas)." 



