52 GENERA OF HYMENOPTERA. 



"23. -Face narrow, r()ii<iliened ; cheeks siiii])U' ajid entire beneath: nietathorax 

 areohited; four anterior tiliise 9 dihited, narrowed and twisted towards 

 the base: abdomen subpetiolate, davate, basal segment straight, grad- 

 ually widened towards tlie apex I^siboiiii Cress. 



Face broad, smooth and polished; cheeks with a large tootli-like process 

 beneath; thorax flattened, much elongated in front of wings; meta- 

 thoi-ax not areolated, smooth and polished : wings long and narrow, the 

 stigma and areolet nearer than lasnal to the apex of the wing ; tibia- 

 simple ; abdomen much elongated, slender, petiolate. the basal segment 

 very long and curved upwards towards the apex, which is slightly di- 

 lated ; ovii)ositor as long as first abdominal segment. CiJpofoa Cress. 



Family STEPHANIDyE. 



In tliis family the head if« globose, rugose, the vertex tuberculate, 

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

 froni'the base of the mandibles which are triangular and ])rotruding; 

 antennie long, setaceous, multiarticulate (with from thirty to forty 

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

 scape subglobo.se ; prothorax more or less narrowed anteriorly into a 

 neck ; nietathorax quadrate or subquadrate, with protuberant flanks ; 

 wings narrow, stigma well developed, costal cell di.stinct, marginal 

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

 wing, one complete submarginal and two discoidal (f]r.st and second) 

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

 than their tibite ; posterior legs robust, the rugose coxse nearlv as 

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

 beneath, their tibiae longer than tlu'ii' t'cnioi-a, clavatc, coiiipi-cssed 

 and narrowed towai'ds the base and .sometimes pinched, llicii- tarsi 

 about half the length of tlieir tibiae; tibial spurs very short; tarsal 

 claws entire ; abdomen long, enlarged and subcompressed at the ajiex 

 in 9 , attached to tlie apcix of the nietathorax, petiolate or subsessile ; 

 ovipositor longer than the body. 



Our species may be separated into two genera, distinguished by 

 the foHowing characters: 



Posterior t'ar.si 5-jointed in 9 <!'"<! presumably so in % ) : neck comparatively 

 short; abdomen sub.sessile, the first segnu-nt not longer than the second. 



Stopliuiiiis .lurine. 



Posterior tarsi .'S-joindd in 9- •'>-.j<iinl((l in % ; neck long; abdomen jR'tiolate, 

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

 second iMej^iNcliiis !?rulh'\ 



The characteristics given nhoxe oi' Strj)h(ini(.'< are those of n species 

 (cinctipe-H) from ^\'ashington Territory, the oidy one yet described as 

 occurring in our fauna and of which only the 9 is known ; the form 



I 



