No. 2326. THREE TRIBES OF ICHNEUMONINAE—CUSHMAN. 29 



Subgenus Zatypota (Foerster) Schmiedeknecht. 



Zatypota (Foerster) Schmiedeknecht, Verb. Nat. Verb. Preuss. Rbeinl., vol. 25, 

 1868, p. 166 ; Zool. Jabrb., vol. 3, 1888, p. 433. Genotype.— Ichneumon per- 

 contatoria O. F. MuUer. 



Differs from the subgenus PolysjMncta by the characters used in 

 the subgeneric key and usually by the following: Face narrower, 

 distinctly longer than wide at clypeus; notauli more deeply impressed 

 and complete; legs more slender; intercubitus nearly or quite ob- 

 literated; nervellus not broken. 



Most of the species have been described as species of Polys'pliincta. 

 Glyptajxirva Cresson, Clistojnjga alhorhomharta T>SiYis, and Clisiopyga 

 nigroce'pliala Davis belong here, while Polysphincta (Zatypota) stiigis 

 Howard is here referred to the subgenus Polysphincta because of 

 its tuberculate tergites and long ovipositor. 



KEY TO NORTH AMERICAN SPECIES. 



1. Tergites polisbed witb, or witbout transverse aciculations on median area . . 2. 



Tergites distinctly, finely sbagreened 3. 



2. Abdomen black witb rbomboidal areas whitish; radius originating at middle of 



stigma alborhombarta (Davis). 



Abdomen paler and witb dark and light colors in reverse arrangement; radius or- 

 iginating before middle of stigma dictynae Howard. 



3. Black or blackish without definite markings; carinae of first tergite strong nearly to 



apex, area between deeply impressed 4. 



Brownish with yellowish markings ; carinae of first tergite obsolescent beyond sum- 

 mit of tergite, space between flat 5. 



4. Rhomboidal areas of tergites distinctly set off, impressions striate; hind femur at 



apex and tibia subbasally not black theridii Howard. 



Rhomboidal areas not distinctly set off, impressions not striate; hind femur at 

 apex and tibia subbasally black pontiaci Viereck. 



5. Median carinae of propodeum present; petiolar area more or less defined 6. 



Median carinae absent, sometimes replaced by a median groove; petiolar area not 



at all defined 8. 



6. Temples nearly flat; postocellar line longer than ocell-ocular line, diameter of 



lateral ocellus about equal to latter; mesoscutum subpolisbed sbagreened, much 



longer than wide, prescutum long braitcheri Cushman. 



Temples strongly rounded; postocellar and ocell-ocular lines subequal, diameter 

 of lateral ocellus less than either 7 . 



7. Mesoscutum red, opaque sbagreened, prescutum short and broad; hind tibia with 



a subbasal black annulus; apical carina of propodeum practically wanting, 



petiolar area sbagreened nigrocephala (Davis). 



Mesoscutum piceous, polisbed, prescutum long and narrow; hind tibia black only 

 at apex; apical carina of propodeum strong, petiolar area polished 



granulosa Davis. 



8. Temples flat; second tergite broader than long; first tergite a half wider at apxe 



than at spiracles califomiensis Cushman. 



' Temples rounded; second tergite about as broad at apex as long; first tergite much 

 less than a half wider at apex than at spiracles 9 



9. Nervellus unbroken and strongly inclivous; hind tarsi much shorter than tibiae; 



mesoscutum granularly subopaque cros byi Cushman . 



Nervellus broken, perpendicular; hind tarsi nearly as long as tibiae; mesoscutum 

 polished parva (Cresson). 



