340 PROCEEDINGS OF THE NATIONAL MUSEUM. tol. 58. 



Subgenus Itoplectis (Foerster) Woldstedt. 



Pimpla Authors, in part. 



Itoplectis (Foerster) Woldstedt, Vehr. naturh. Ver. preuss. Rheinland, vol. 25, 



1868, p. Ill; Bull. Acad. Imp. Sci. St. Petersbourg, vol. 10, 1877, p. 16, separate. 



Type, Pimpla tnaculator (Fabricius). 



The original description of Itoplectis consists of the characters used 

 by Foerster in his key to the genera. He did not include any species, 

 nor were there any included until 1877, when Woldstedt placed two 

 species in the genus. One of these, maculator Fabricius, was desig- 

 nated by Viereck* as the genotype. 



Most of the species have been described under other generic 

 names, the earlier ones under Ichneumon and Pimpla, the latter 

 name having been most commonly employed. 



KEY TO NORTH AMERICA SPECIES. 



1. All coxae black, at least basally (in some males only the hind coxae are 



black, the others yellow) 2 



Front coxae only black and usually only at base 5 



2. Hind and middle tibiae and tarsi not annulated; trochanters black; scutellum 



strongly margined to apex; front coxae concave behind... atrocoxalis (Cresaon). 



Hind and usually the middle tibiae and tarsi annulated with white; scutellum 



not strongly margined to apex ; front coxae normal 3. 



3. Head behind the eyes broad and strongly rounded; front claws in female without 



basal tooth; all coxae in male entirely black evetriae (Viereck). 



Head behind the eyes narrowed and only moderately convex; front claws in 

 female with basal tooth ; front and middle coxae in male whitish or testaceous 

 at least at apex 4. 



4. Abdomen more or less red laterally and with tergites yellow tipped; front and 



middle coxae in male black nearly to apex behrensii (Cresson). 



Abdomen entirely black; coxae in female red, in male front and middle coxae 

 mostly pale, hind coxae black obesus Cushman (male). 



5. Mesepisternum with a distinct, sharp, oblique furrow across the upper end of the 



prepectal suture ; venter black temnopleuris, new species. 



Mesepisternum without such a furrow; venter black and white 6. 



6. Apices of tergites distinctly yellowish or whitish; abdomen shining. 



conquisitor (Say). 

 Apices of tergites at most narrowly piceous; abdomen opaque or subopaque 7. 



7. Propodeum polished impunctate throughout, nervulus slightly postfurcal. 



quadricingulatus (Provancher). 

 Propodeum polished only behind and medially ; nervulus practically interstitial . . 8. 



8. Abdomen in female very broad fusiform, third tergite at least twice as wide at apex 



as long in middle, first tergite with anterior basin occupying about two-thirds of 

 dorsal length; postocellar line and diameter of lateral ocellus equal and twice 



as long as ocell-ocular line 9. 



Abdomen in female narrower, third tergite usually less than twice as wide at apex 

 as long in middle, first tergite with anterior basin occupying but little more than 

 half of dorsal length; post cellar line twice as long as ocell-ocular line 10. 



1 Bull. 83, U. S. Nat. Mus., 1914, p. 79. 



