52 GENERA OF IIYMENOPTERA. 



23. -Facp narrow, roiidhcncd; cheeks simple and entire beneath: inetnthorax 

 areolated ; four anterior til>iie 9 dilated, narrowed and twisted towards 

 the base: abdomen Hiil>|>utiolate, elavate, basal sej^ment stmi^lit, ^rad- 



nally widened towards the i\\K-\ IjUbcilH (^ress. 



Face ))roiid, smooth and polished: cheeks wi^li a larjje tooth-like process 

 beneath ; thorax flattened, much elon);ated in front of wings ; nieta- 

 tlionix not areolated, smooth and |K>lisbed ; winps long and narrow, the 

 stigma and areolet nearer than ustial to the apex of the winj; ■ tibisB 

 simple: abdomen much elongated, slender, pt^tiolate. the basal segment 

 very long and enrved njiwards towards the ai)ex, which is slightly di- 

 lated ; ovi|M>sitor a.s long as first abdominal segment Cirotea t're.sK. 



Family STEPHANIDiE. 



In this family the head is globcjse, rugose, the vertex tuberculate, 

 cheeks smooth and swollen ; eyes ovate, relatively small and distant 

 fnmi the bsiseof the mandibles which are trianjridar and protruding; 

 antenna' long, setaceous, multiarticulate (with from thirty to forty 

 joints), inserted low down near the clypeus and well separated, the 

 scape sid)globose ; i)rothor; \ more or less narrowed anteriorly into a 

 neck ; metathorax quadrate or sulxjuadrate, with protuberant flanks ; 

 wings narrow, stigma well develoj)ed, costal cell distinct, marginal 

 cell long, narrow, lanceolate, extending almost to the apex of the 

 wing, one complete sidimarginal and two discoidal (first and second) 

 cells ; four anterior legs slender with short coxte, anterior tarsi longer 

 tlian their tibite ; posterior legs robust, the rugose coxte nearly as 

 long as their femora which are incrassated and more or less toothed 

 beneath, their tibiie longer than their femora, elavate, compressed 

 and narrowed towards the base and sometimes pinched, their tarsi 

 about half the length of their tibia' ; tibial spurs very short ; tarsal 

 claws entire ; abdomen long, enlarged and subconipressed at the a]>ex 

 in 9 , attached to the a})ex of the metathorax, petiolate or subsessile ; 

 ovipositor longer than the body. 



Our species may be separated into two genera, distinguished by 

 the following characters : 



Posterior tarsi 5-jointed in 9 (and presumably so in %) ; neck comparatively 

 short ; abdomen subsessile, the first segment not longer than the second. 



NtephaiinN Jurine. 



Posterior tarsi S-jointed in 9. 5-jointed in % ; neck long; abdomen petiolate, 

 the first segment long, slender, cylindrical, fully twice tlie length of the 

 second MogiMchus Brulle. 



The characteristics given above of Stephanm are those of a species 

 (cindlpes) from Wsishington Territory, the only one yet described jus 

 occurring in our fauna and of wliich onlv the 9 i*^ known ; the form 



