30 Journal New York Entomological Society. [VoI. xi. 



1 6. Front wings with a basal nervure 1 7 



Front wings without a basal nervure l8 



17. Mesonotum longer than wide; first flagellar joint as long or longer than the 



second ; costal cell closed. 



Abdomen without sulci at base Spilottlicrus IVestwood 



Abdomen with sulci at base Idiotypa Forster 



Mesonotum not longer than wide ; first flagellar joint hardly as long as the second : 



costal cell open. 

 Stigmal vein much longer than the marginal Hetnilexis Forster 



18. First flagellar joint not half as long as the second Paramesius IVesizvood 



19. Submarginal vein not reaching the costa, ending in a stigma or knob 21 



Submarginal vein reaching the costa. 



Mesonotum with two furrows 20 



Mesonotum without furrows. 



Flagellar joints elliptic-oval Tropidopsis Ashviead 



20. Front wings without a basal nervure. 



Eyes hairy Sy nacra Forster 



21. Stigma with a stigmal vein Aneurhynchus IVeshvood 



Subfamily II. DIAPRIIN.^.. 

 This group is distinguished by the brevity of the submarginal vein which reaches 

 the costa at about one third the length of the wing ; to it belong also some wingless 



forms. 



Table of Genera. 



Females I 



Males 20 



1. Antennae less than 14-jointed 3 



Antennae 14-jointed. 



Pronotum normal 2 



Pronotum abnormal, produced anteriorly into a long horn that extends for- 

 ward over the head Notoxoides ^.y/zw. g. nov. 



(type iV. brasiliensis ASHM.). 



2. Mesonotum without furrows ; front wings without a basal nervure. 



Myrmecopria Ashmead (type Loxotropa mel/ca AsHM.). 



3 Antennje 13-jointed 4 



Antennae 12-jointed or less 5 



4. Mesonotum without furrows or only slightly indicated posteriorly. 



Scutellum foveated at base ; club of antennae i -jointed ; basal nervure present. 

 Basalys IVesiwood (type B. fumipennis Westw.). 

 Scutellum not foveated at base ; club of antenna consisting of one en- 

 larged joint Monelata Forster (type Diapria parviila Nees) 



5. Antennae 12-jointed 6 



Antennae li-jointed 19 



6. Face normal or not greatly lengthened 7 



Face abnormal, greatly lengthened ; mandibles rostriform. 



Mesonotum with two furrows Galesus Curtis 



(type Psihts cormttiis P.\nzer). 



