76 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. 



60. Last joint of hind tarsi as long or longer than the third, or scarcely perceptibly 

 shorter - 70 



Last joint of liind tarsi shorter than tlie third 71 



70. Alxloniinal segments 3 and 4 narrower, at apex than at base. 



(575) HyjKi-batus Forster. 

 Abdominal segments 3 and 4 fully as wide at apex as at base. 



Clypeus with a transverse impression l)efore apex; hind tarsi a little longer 



than the tibiae (576) Scoparchcs Forster. 



Clypeus '«w7/(oh/ a transverse imi)ression before apex; hind tarsi somewhat 



shorter than the tibire (577) GemopJiaga F(")rster. 



7L Base of third discoidal cell as long or longer than the transverse median 



nervure 72 



Base of third discoidal cell shorter than the transverse median nervure. 



Second recurrent nervure uniting with the cubitus behind the transverse 

 cubitus; first abdominal segment near the spiracles without long, 



deeply foveated furrows (578) Allocritus Forster. 



Second recurrent nervure almost interstitial; first abdominal segment near 

 the spiracles with long, deeply foveated furrows. 



(579) Ena'cetis Forster. 



72. Malar space longer than the Avidth of the mandibles at base; longer spur of hind 



tibiic scarcely more than one-third the length of the basal joint of 



tarsi (580) SynodUcn Forster. 



Malar space not longer than the width of the mandibles at base. 



First three abdominal segments iiot rugulose 74 



First three abdominal segments rugulose. 



Segments 1 and 2 without a transverse impression 73 



Segments 1 and 2 with a transverse impression (581) Spiuhra. Forster. 



73. Transverse median nervure in the hind wings ];»roken at the middle; metathorax 



vnlJi the petiolar area normal without a middle carina; clypeus 

 anteriorly, on both sides, very deeply impressed; second abdominal 

 segment iclthout distinct t-arinte near the thyridia; dorsal carime of 



first segment obliterated at base (582) Rhinotorus Forster. 



Transverse median nervure in hind wings broken a little heloiv the middle; 

 metathorax with the i^etiolar area with a sharp median carina; second 

 abdominal segment with a distinct shortened carina near thyridia; 

 sole of tarsi clothed with long hairs; dorsal carinse of first segment, 

 esjjecially basally, very prominent (583) CamponaMes'FoYiiiev. 



74. First abdominal segment at apex not more than twice as wide as at base 75 



First abdominal segment at apex more than twice as wide as at base. 



Clypeus posteriorly at base iiot flattened; transverse cubital nervure and the 

 second recurrent nervure almost interstitial. 



(584) Tautozelus Forster. 

 Clypeus posteriorly at base flattened (585) Hypamhlys Forster. 



75. Clypeus anteriorly ivith a slight transverse impression before apex, the anterior 



margin interrupted and fringed with strong erect hairs. 



(586) Fhxstus Forster. 

 Clypeus not fringed with erect bristles on the anterior margin. 



Sutures between abdominal segments 1 and 2 not deep; clypeus with the 



anterior margins not deeply impressed on both sides 76 



Sutures between segments 1 and 2, as well as between segments 2 and 3, 

 deep; clypeus with the anterior margin very deeply impressed on 

 both sides. (587) Phagesorus Forster. 



76. IVIesonotum scutellum and first three abdominal segments more or less 



cariaceous 77 



I 



II 



