No. 2326. THREE TRIBES OF ICHNEUMONINAE—CUSHMAN. 37 



tergite differentiate it. Except for the lack of an areolet it might 

 be an Epiurus; or even without the areolet it may be a Tromatobia, 

 though here the short first tergite is out of place. 



(PolyspMncta cingulata Provancher)= Tromatobia rufovariata (Cresson). 



Polysphincta nigriceps Walsh, and 



PolyspMncta nigrita\VAJ.s-R, Trans. Acad. Sci., St. Louis, vol. 3, 1873, p. 144. 



The types of the last two species have been destroyed and it is pos- 

 sible oidy to conjecture what they were. From Walsh's careful 

 descriptions, however, it is evident that they were botli species of 

 Zatypota and closely allied to nigrocephala (Davis). 



PolyspMncta pimploides Walspi, Acad. Sci. St.Louis, vol.3, 1873, p. 145, 

 If this is properly referred to the genus, as seems very doubtfid, 

 it is very distinct by reason of the very long ovipositor. I know of 

 no species that approaches it in this respect. 



{PolyspMncta pleuralis Provanchek)= (jBgssms) Diplazon pulchripes (Provancher) . 

 {PolyspMncta rubricapensis Provancher) = (Pimpla) Zaglyptus incompletus 



(Cresson). 

 {PolyspMncta spiaosa DAxif^)= {Pimpla) Zaglyptus incompletus (Cresson). 



PolyspMncta rufigasira (Ashmead)= (Pm/,Za) Zaglyptus arrimosus (Cresson). 

 Isotypic, Ashmead ha^dng redeecribed Cresson's type. 



ZABKACHYPUS, new genus. 



Differs from Polysphincta principally by the characters used in 

 the foregoing key to genera. Its short, stout body \vith stout legs, 

 rery short tarsi, deep sternauli, and incomplete pentagonal areolet 

 render it very easily recognizible. 



Head distinctly narrower than thorax; malar space shorter than 

 basal width of mandible; antennae stout; thorax nearly as high as 

 long: propodeimi very short, ^vithout either carinae or longitudinal 

 groove; sternauli deep; legs stout, tarsi very short and thick; second 

 intercubitus indicated by thickenings in cubitus and radius, the 

 areolet irregularly pentagonal in position but open behind; first 

 tergite broad with sides widely divergent; other tcrgites strongly 

 transverse, elevations and impressions weak; exserted portion of 

 ovipositor sub equal in length to first tergite. 



Genotype. — Zahrachjpus prlmm Cushman, new species described 

 below. 



ZABRACHYPUS PBIMUS, new epecies. 



Female.— Length 6.5 mm „, antennae 4.25 mm., ovipositor 1.0 mm. 



Head polished, rather densely pilose; face medially elevated and 

 weakly punctured, about as long as wide; clypeus half as long as 

 wide, arcuately sub truncate, rather weakly convex; malar space 

 barely half as long as basal width, of mandible; eyes large, convergent 

 below, sinuate within; diameter of lateral ocellus, postocellar line, 



