G. C. DAVIS. 295 



transverse impressed on apical portion, usually margined at apex, 

 more or less emarginate on median apex. Mesothorax deep, meso- 

 notum prominent anteriorly ; parapsidal grooves present anteriorly ; 

 scutellum oval, slightly prominent ; metathorax small, smooth, not 

 polished ; carinte distinct, the transverse basal wanting ; median 

 longitudinal carinse lie close together at base and diverge consider- 

 ably posteriorly. Abdomen well proportioned ; ovipositor slightly 

 exserted ; segments even above ; basal segment moderately bi-oad at 

 apex, considerably and gradually narrowed to base, carinpe or groove 

 usually present, rarely wanting. Legs slender, rather long. Wings 

 large, areolet almost always wanting, the second recurrent nervure 

 uniting far back of cubital ; humeral cross-nervure broken below 

 the middle. 



Abdomen and thorax mostly rufous; scntellum yellow Noapularis Cress. 



Abdomen mostly or entirely rufous, thorax black. 

 Scutellum pale. 



Posterior coxse black ; trochanters and v-shaped mark on face yellow. 



convergent n. sp 

 Posterior coxfe rufous; posterior tibise with more or less of a yellowish an- 

 nulus. 



Face and margins of mesonotum black niiperiiK n. sp. 



Face and lateral margins of mesonotum yellow visoris n. sp. 



Scutellum black. 



Posterior coxfe black. 



Hind tibife yellowish, black at apex ; femora piceous fidelis n. sp. 



Hind tibise and femora rufous. 



Stigma triangular ; face yellow consors n. sp. 



Stigma elongate; face black, yellow spots on mesonotum. 



contractus n. sp. 

 Posterior coxfe rufous. 



Abdomen black at base and apex ; posterior tibiae, yellow, black at apex. 



idahoensis n. sp. 



Abdomen and posterior legs rufous con vexus u. sp. 



Abdomen black or piceous. 



Scutellum and apical margin of abdominal segments more or less white. 

 Pleurae rufous or white. 



Posterior tibife white at base or with a distinct white annulus. 

 Mesonotum black; posterior coxae and femora rufous. 



jsinbniarginatus Cress. 

 Mesonotum rufous; posterior coxfe and femora white. 



pnlchranotns n. sp. 

 Posterior tibife without distinct annulus; face mostly black; scutellum 



with lateral white stripes inellipes Prov. 



Pleurae black. 



Posterior femora and tibiae piceous: scutellum with lateral white spots at 



base ; white line on inner tibife striatus n. sp. 



Posterior femora rufous; tibiae white, black at apex ; scutellums white. 



auda.Y n. sp. 



TRANS. AM. ENT. SOC. XXIV. OCTOBEK. 1897. 



