254 AMERICAN HYMENOPTERA. 



ElJC;i<:RO!§i Graven liorst. 



Eamesius Westwood. 



(Ichu. Europ. T. Ill, 368, 1829.) 



This genus is characterized primax-ily by the concealed ovipositor 

 in the 9 and by the antennae in the % being flat and greatly broad- 

 ened from joints 10-15, gradually tapering to a point at apex. The 

 antennae of the $ also partake somewhat of this form. Other 

 characteristic points are : pectinate claws, sessile abdomen, with two 

 usually distinct, converging carinse at base ; segments broader than 

 long ; metanotum with two median longitudinal carinee diverging 

 from the base ; wings more or less dusky at the apex, without areolet 

 and with second recurrent nervure sinuate. 



Posterior tiliise black or dusky, yellow at base. 

 Coxse black to yellow. 



Abdomen varied with black aud yellow and always with a more or less dis- 

 tinct, median, longitudinal, yellow stripe ; stigma rufous; hind coxpe 



and scutellum at base, mostly black canadensis Cress. 



Abdomen black, with apical half of all the segments yellow ; stigma black ; 



scutellum at base and most of hind coxse, yellow obesa n. sp. 



Abdomen, except basal segment, rufous couperii Cress. 



Coxje, femora and abdomen rufous frigidus Cress. 



Posterior tibise rufous, sometimes yellow at base. 



Hind tarsi rufous, with median segments yellow; wings very dark at apex. 



sanguineus n. sp. 

 Hind tarsi unicolor, wings faintly dusky at apex. 

 Sternum lemon-yellow. 



Notum black and yellow thoracicns Cress. 



Notum and abdomen dark rufous faciens n. sp. 



Sternum color of the remainder of thorax. 



Abdomen fulvous, with more or less distinct, transverse, yellow spots; 



thoracic vittse yellow inedialis Cress. 



Abdomen aud thorax uniform bleached fulvous flavescens Cress. 



Eueeros canadensis Cress., Can. Ent. i, 104. 



9 . — 11 mm. Black, with the following parts lemon-yellow: front except por- 

 tion enclosing antennte, broad orbital lines, mouth parts except tips of mandibles, 

 prothoracic collar, more or less distinct lines along parapsidal grooves, recurving 

 on margin of mesonotum, tegulse. spot in front, line beneath, narrow line and 

 spot in front and behind on mesopleura, broad margin of scutellum. postscutellum, 

 capillary lines to scutellums, more or less of apical portion of metathorax, four 

 anterior legs, posterior trochanters, base and apex of femora, base of tibise, tarsi, 

 median transverse bands at apex of segments 1-3, broad median spot at base of 

 first segment, more or less distinct, longitudinal, median stripe on segments aud 

 venter; femora dusky rufous; antennae, black, fulvous at apex; wings hyaline^ 

 dusky at tip, stigma slender, rufous. 



% . — Dilfers in having the antennae much broadened in the middle and in 

 having the sternum, most of pleurae, middle of antennae, inner and under portion 



