MONOGRAPH OF THE NORTH AMERICAN PROCTOTRYPID^E. 301 



Anteiinit' brown, the scape variable, sometimes almost black ; pedicel longer 

 tliau the two following joints united, not especially stout; joint 

 1 of fuuicle very minute, second larger and a little thicker than 

 the third, fourth broader; club joints, except the last, not especially 

 widened, slightly longer than wide P. solidaginis Ashm. 



2. Legs dark rufous, the tarsi pale. 



Anteuua' brown; fun iclar joints 1 to 3 very small, slightly increasing in size, 

 fourth larger; clul) joints, except the last, scarcely longer than 

 wide P. I'iNicoLA. 



3. Vertex not transversely striated or aciculated, smooth, or at the most very faintly 



aciculated 4 



Vertex posteriorly strongly transversely striated or aciculated. 

 Vertex impressed at the middle, subangiilated just over the eyes. 



Legs and antenna' black or brown-black P. stkiaticeps. 



Vertex not impressed at the middle. 

 Coxie black. 



Legs and antenna^ black, trochanters, tip of anterior tibia-, and tarsi honey- 

 yellow. 

 Dorsal abdominal segments 3, 4, and 5 impunctured, joint 1 of fiinide 

 very minute, jtale, secoud slightly longer than the third. 

 Club joints a little longer than thick, cup-shajjed, outwardly sub- 

 serrate P. ATUII'LICIS. 



Club joints wider than long, outwardly not serrated P. ahtemisi.e. 



Dorsal ab<lomiual segments 3, 4, and 5 with a, row of punctures. 



P. VIlililNIICNSIS. 



Legs brown or piceous, trochanters, knees, tips of anterior tibiie, and tarsi 

 pale. 

 Head very wide. 

 Ajjical ventral segments not punctate. 



Teguhe black; joint 1 of fuuicle very minute, second longer than the 

 tliird; club not especially widened, the joints scarcely broader 



than long P. alnicola. 



Teguhe rufo-piceous; joint 1 of fuuicle small, second and third nearly 

 equal; club very wide, the joints wider than long, serrate toward 



one side P. tumjous. 



Apical ventral segments punctate. 



Head four or more times as wide as thick. 



Club joints longer than wide P. latueps. 



Head not especially wide. 



Teguhe rufo-piceous; antenna' brown; pedicel not long, cylindric, 

 twice as long as thick; joint 1 of funicle small, not longer than 

 thick, second larger and a little longer than the third; club joints, 



except the last, scarcelj'^ longer than wide P. hiemalis Forbes. 



Teguhe black; autenute brown-ldack; pedicel long, cylindric, fully 

 thrice as long as thick, second longer and thicker, third a little 

 longer then the second; club slender, the joints distinctly longer 



than wide P. pkoximus. 



Coxa', rufo-piceous or pale. 



Legs and antenna' dark brown; trochanters, base of tibia', and tarsi pale. 

 Teguhe rufo-piccons; joint 1 of funicle very minute, second and third 

 larger, about equal in length, the second the thicker; club joints, 

 except the last, as wide as long. 

 Four last dorsal segments with a row of punctures P. ^'ITICOLA. 



4. Vertex angularly produced just over the eyes. 



Legs and antennae black ; tarsi piceous P. utauensis. 



