BIOLOGICAL PAPERS. 295 



transverse impression which joins the posterior border of the sclerite; basal area 

 broader than long, areola and petiolarea confluent, parallel sided, about four 

 times as long as wide, in part coarsely, transversely wrinkled, nearly striate and 

 shining, lateral areas dull rugose; metapleura dull, minutely sculptured; wings 

 faintly brownish, nervures and stigma entirely brown, the stigma paler than the 

 nervures; neuration almost exactly as in Homalomma aloga, the areolet com- 

 pleted, pentangular, not the slightest trace of a stump of a vein to break the 

 discocubital nervure; transverse median nervure of posterior wings faintly 

 broken a little below the middle. Abdomen almost entirely smooth and shining; 

 the petiole with a fine raised line on each side, very inconspicuously covered 

 with short whitish pubescence. Black; mandibles and legs to a great extent 

 almost rufous, tips of the mandibles and tarsi brownish, coxaj of posterior and 

 middle legs black, basal trochanters of middle and posterior legs strongly brown" 

 ish ; second abdominal segment brownish, the third segment, except along the 

 apical margin, yellowish. 



Type: University of Kansas. Type locality : Oak creek canyon, Ariz., 6000 

 feet. August, F. H. Snow. 



Ichneumon (Eurylabus) arizonensis, n. sp. 



Superficially like I. navus and allied species. 



Female. — Length, 10 mm. Head shining; face closely punctured, the punc- 

 tures adjoining or nearly, prominent elevated between the antennie and base of 

 clypeus, the elevation separated from the sides of the face by shallow grooves; 

 clypeus with coarse, sparse, very distinct punctures, much larger than the punc- 

 tures on the face, the anterior margin somewhat turned up, regular; malar space 

 as high or a little higher than the mandibles are broad at base; front, vertex 

 and cheeks almost uniformly, closely punctured, the punctures on these parts 

 smaller and closer than on the face; antenn;e thirty-four jointed, the joints of 

 the flagellum subequal, the first joint and pedicellum combined about two- 

 thirds the length of the scape. Thorax mostly shining, partly dull; dorsulum 

 closely punctured, the punctures adjoining or nearly and to some extent conflu- 

 ent, giving a striate appearance; parapsidal grooves very faintly indicated on 

 the anterior third; propleura with distinct separated punctures on the upper 

 portion, below the surface is closely transversely striate punctate; mesopleura 

 rather closely punctured and somewhat striate, on the posterior half of this 

 sclerite a little above the middle is a transverse impression that looks like two 

 pits, one very shallow, the other and posterior one deep; the scutellum shining, 

 sparsely punctured, immargined; postscutellum polished like the scutellum, ap- 

 parently impunctuate; metathorax dull; superior face of the metanotum with 

 apparently no basal area, the areola occupying nearly all of the middle of the 

 superior face for a width as great as that of the scutellum, about one and a half 

 times as long as wide ; posterior face of the metathorax with three distinct areas, 

 the petiolarea nearly parallel-sided and as broad or a little broader than the 

 areola, the lateral areas of the posterior face bounded by strong, coarse ridges, a 

 little above the middle of each side of the posterior face the groove just mentioned 

 is produced into a more or less short, sharp tooth ; metapleura very closely punc- 

 tured, giving a rugulose appearance; wings with distinct yellowish-brown tinge, 

 the stigma nearly black, nervures very dark brown, excepting the second trans- 

 verse cubitus and the terminal abcissse of the cubitus and subdisciodal nervures 

 which are more or less testaceous; areolet pentagonal, the first cubital side and 

 the transverse cubiti of equal length, the second cubital side a little shorter than 

 the first and a little longer than the radial side, only the slightest trace of a stump 



