62 PROCEEDINGS OF THE NATIONAL MUSEUM. voL.xxin 



not projecting above the lateral lobes; jietiolar area widely open at 

 the middle; wings often with a brown transverse band. 



(407) Xyloplirurus F(")rster. 

 Transverse median nervure in hind wings broken behind the middle; front tibi;e 

 inflated, constricted at base; mesonotnm trilobed, the middle lobe 

 l)riefly caniculate; metathorax irregularly arcuately striate. 



(408) Gabunia Kriechbanmer. 



12. Metanotum not or very indistinctly areolated; all tibife slender or only slightly 



thickened; antennje in female vilhout stiff bristles or hairs; abdomi- 

 nal segments 2 and 3 without transverse impressions; legs slender, 



the posterior pair lengthened 17 



Metanotum usually completely areolated, rarely exareolated; front tibia) much 

 thickened or inflated, constricted at base; antennte in female vIlJi, 

 rather stiff bristles; abdominal segments 2 and 3 with a more or 

 less distinct transverse impression. 



Metanotum completely areolated 13 



Metanotum not areolated (409) Moansa Tosquinet. 



13. Antennfc in l)oth sexes short and faintly hairy, the female alone with stiff 



bristles before apex 14 



Antennae in both sexes clothed with long shaggy hairs — in male entirely, in 

 female only toward apex; female antennae ringed with white; ovi- 

 positor longer than the abdomen (410) Sterotriclius Forster. 



14. Transverse median nervure in front wings uniting with the median vein beyond 



the origin of the basal nervure; first abdominal segment without a 



transverse ridge before apex 15 



Transverse median nervure in front wings originating before the basal iiervurc; 

 first abdominal segment with a transverse ridge before aj^ex. 



(411) Gonophorus Forster. 



15. First abdominal segment medially not emarginate 16 



First abdominal segment medially more or less emarginate. 



(412) Xylonomus Gravenhorst. 



16. Second abdominal segment longer than wide (413) Mcerophora Forster. 



Second abdominal segment not longer than wide. 



Head behind the eyes inflated; antennas in Ixjth sexes ringed with white; 

 first abdominal segment with two complete carina?; ovi^iositor as 

 long as the body (-114) Sichclia Forster. 



Head behind the eyes not inflated; antennre not ringed with white; first 

 abdominal segment without complete carinpe. 



(415) Rhadina Forster. 



17. Face distinctly narrowed anteriorly; mandibles of an equal length; clypeus at 



apex strongly impressed; head broadened behind the eyes; abdo- 

 men more or less sessile, rarely somewhat petiolate. 



(416) Xorides Gravenhorst. 

 Face not or scarcely narrowed anteriorly; mandibles of an unequal length; 

 clypeus at apex flat, not impressed; head somewhat inflated, 

 slightly narrowed behind the eyes; abdomen narrow, cylindrical, 

 petiolated, with segments 1-5 in female, or 1-7 in male, longer than 

 wide (417) I'amenia Holmgren. 



t 



