THREE TRIBES OF ICHNEUMONINAE—CVSHMAN. 21 



KEY TO SUBGENERA. 



Middle terj^ites with more or less prominent lateral rounded elevations, the apical 

 transverse furrows usually interrupted in the middle and reduced to broad impres- 

 sions; abdomen smooth and polished or distinctly punctate; exscerted portion of 

 ovipositor at least nearly as long as first tergites; generally larger, more slender 

 species Polysphincta Gravenhorst. 



Middle tergites with lateral elevation lacking, the apical furrow usually complete and 

 sharply defined, and, with basal furrows, sotting off a more or less distinct rhomboid 

 or oval median area; abdomen usually finely shagreened, sometimes minutely 

 transversely aciculate or polished; exserted portion of ovipositor much shorter 

 than first tergite; generally smaller, stouter species Zatypota Foerster. 



Subgenus Polysphincta Gravenhorst. 



Polysphincta Gravenhorst, Ichn. Eur., vol. 3, 1829, p. 112. Genotype. — Poly- 

 sphincta tuberosa Gravenhorst. 

 Distinguishable from Zatypoia in addition to the key characters 

 by having the face usually broader, rarely distinctly longer than 

 width at clypeus; notauli usually broad and shallovv'; legs stouter; 

 intercubitus distinct, rarely very short; nervellus usually broken. 



The species of this group are easily separated by the venational, 

 clypeal, sculptural, and color characters used in the following key. 



KEY TO NORTH AMERICAN SPECIES. 



1. Abdomen strongly, coarsely punctate; hind tarsi black with only the basitarsus 



pale at base; entire length of ovipositor but little longer than first tergite; body 



entirely black texana Cresson. 



Abdomen practically impunctate, polished, or occasionally, especially in males, 

 more or less punctate in the depressions; entire ovipositor at least nearly twice 

 as long as first tergite ; thorax most frequently more or less reddish 2. 



2. Clypeus white; body, except apical lateral spots on tergites, sanguineous; legs en- 



tirely white or whitish albipes Cresson. 



Clypeus piceous to black 3. 



3. Clypeus somewhat flattened, short and broad, its apex more or less reflexed, in 



certain positions giving the impression of truncation 4. 



Clypeus strongly convex, long, and strongly rounded and not reflexed at 



apex 6. 



4. Mesothorax laterally largely testaceous Jcoebelei Howard. 



Mesothorax laterally mostly or entirely black ^ 



5. Propodeum with median longitudinal furrow, but without carinae and polished; 



ovipositor approximately half as long as abdomen elongata Cuahraan. 



Propodeum with longitudinal carinae and more or less irregularly rugulose; 

 o\ipositor distinctly less than half as long as abdovaen. . .burgessi CresBon, 



6. Wings with areolet slossonae Davis. 



Wings without areolet strigis Howard. 



POLYSPHINCTA (POLYSPHINCTA) TEXANA Cresson. 



Plate 2, fig. 2. 



Polysphincta texana Cresson, Trans. Amer. Ent. Soc, vol. 3, 1870, p. 149, female 

 Type.— Acad. Nat. Sci. Phila., No. 1,427. 



Polysphincta vicina Provancher, Nat. Can., vol. 5, 1873, p. 470, male. Type. — 

 Pub. Mus. Quebec, 1877 Provancher coll. 



Polysphincta bicarinata Davis, Trans. Amer. Ent. Soc, vol. 24, 1897, p. 369, fe- 

 male. Type.—kc&d. Nat. Sci. Phila., No. 168. 



