MONOGRAPH OF THE NORTH AMERICAN PROCTOTRYPIDiE. 301 



Antennii- brown, the soapo variaMe, sonu'timca almnst Mack ; pedicel longer 

 tliaii the two following joints nuited, not cHincially Htout; joint 

 1 of fnnicle very niinnte, Hccond larger and a little thicker than 

 the third, fonrtli broader; eliib joints, except tlie last, not esj»ecially 

 widened, slightly longer than wide P. si)1,ii>auinis Atiinn. 



2. Legs dark rnfons, the tarsi pale. 



Antenna- brown; funiclar joints I to 3 very smnll, sMghtly increasing in size, 

 fourth larger; club joints, except the last, scarcely longer than 

 wide P. I'iNicoLA. 



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



acicnlated 4 



Vertex posteriorly strongly transversely striated or acicnlated. 

 Vertex impressed at the middle, subangnlate<l just over the eyes. 



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



Vertex not impressed at the middle. 

 Coxa' black. 



Legs and antenna' black, trochanters, tij* of anterior tibia-, and tarsi honey- 

 yellow. 

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

 very minute, pale, second slightly longer than the third. 

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

 serrate P. ATUII'LICIS. 



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



Dorsal abdominal segments 3, 4, and 5 with a row of i)iin<ture8. 



P. vii{<;inii;n8I8. 

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

 pale. 

 Head very wide. 

 Apical ventral segments not punctate. 

 Tegula- black; joint 1 of funiele very minute, second longer than the 

 tiiird; club not especially widened, the joints scarcely broader 



than long P. alnkoi.a. 



Tegula- rufo-piceous; joint 1 of funiele small, second and third n«-arly 

 equal; club very wide, the joints widt-r than long, serrate toward 



one side 1*. TUMIDUS. 



Apical ventral segments punctate. 



Head four or more times as wide as thick. 



Club joints longer than wide P, latickps. 



Head not especially wide. 

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

 twice as long as thick; joint 1 of funiele small, not hmgcr than 

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



except the last, scarcely longer than wide P. hikmalis Forbes. 



Tegula' black; antenna' brown-black; 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. I'roximus. 



Coxie rufo-piceous or pale. 



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

 Tegula? rnfo-piccoua; joint 1 of funiele very minute, second and third 

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

 exce]>t the last, as wide as long. 

 Four last dorsal segments with a row of punctures P. viticola. 



4. Vertex angularly produced just over the eyes. 



Legs and antonnee black; tarsi piceous P. utauensis. 



