Mar. 1 899-] ASHMEAD : On SYNOPSES OF FAMILIES OF HvMENOPTERA. 411 



Middle coxa? contiguous, not sei)arated by a triangular or bilobed projection of 

 the mesosternum, the latter being squarely truncate at apex. 



Thorax in the females divided into two parts ; pygidium normal ; hypopygiuin 

 in males produced into a sharp aculeus which curves upwards, or very rarely 

 simple ; hind wings with a distinct anal lobe, the cubitus originating from the 

 apex of the submedian cell, interstitial with the transverse median nervure or 

 rarely originating a little beyond it Family XL. MYRMOSID.l^ 



'J'horax in females undivided, all the parts being closely united or soldered to- 

 gether without visible sutures between ; pygidium normal ; hypopygium in 

 males simple, unarmed, but the genital plate is armed with two slender straight 

 spines which project more or less distinctly from the tip of the abdomen ; hind 

 wings 'vithoiit an anal lobe, the cubitus always originating far before the trans- 

 verse median nervure Family XLI. MUTILLID.F'. 



Family XXXIX. THYNNID.^. 



Table of Genera . 

 Females 9 



Males 



Mandibles bidentate 3 



Mandibles tridentate. 



First transverse cubitus with an appendage or a spurious nervure which di- 

 vides the first submarginal cell into two more or less distinct divisions. . .2 

 First transverse cubitus without an appendage, the first submargitial cell not 

 divided. 

 Second submarginal cell receiving both recurrent nervures ; maxillary 



palpi 6-jointed, labials 4-jointed Frachypterus Gtierin. 



Second submarginal cell receiving the first recurrent nervure, the second 

 interstitial , Oncorhinus Shtickard. 



2. Third submarginal cell larger than the second, the second and third each receiving 



a recurrent nervure ; clypeus not prominent, with a slight triangular emargination, 

 or impression anteriorly ; mandibles with the apical tooth much longer than the 

 two inner teeth ; maxillary palpi 6-jointed, labials 4-jointed. 



Telephoromyia Guerin. 



3. Hypopygium at apex unarmed 6 



Hypopygium at apex dentate or with an aculeus. 



Labrum very slightly visible, usually entirely covered by the projecting clypeus, 



which is most frequently squarely or roundedly truncate anteriorly 4 



Labrum large, distinct and entirely uncovered. 



Labium bilobed ; pygidium transverse, longitudinally striated, the hypopy- 

 gium tridentate, the lateral teeth short ; second recurrent nervure angularly 

 bent at the middle ; maxillary and labial palpi 4-jointed. 



Agriomyia Guerin. 



4. First transverse cubitus with an appendage 5 



First transverse cubitus without an appendage. 



Hypopygium ending in an aculeus. 



Clypeus anteriorly with a slight median sinus ; first transverse cubitus dis- 

 tinct ; maxillary palpi 5-jointed, labials 4-jointed. . Anthobosca Guerin. 



