BIOLOGICAL PAPERS. 297 



Ichneumon (Barichneumon) nigrosignatus, n. sp. 



Very like I. eubcyaneuB, of which it may be a race or nearly a variety. 



Male.— Length, 8mm. Head shining; face with well-defined, distinctly 

 separated punctures; clypeus with very sparse distinct punctures; cheeks more 

 closely, less distinctly punctured than the face; width of the mandibles at base 

 distinctly a little greater than the malar space is high ; antennae thirty-five 

 jointed, the scape and pedicellum together as long as the first joint of the flagel- 

 lum together with one-third the length of the second joint. Thorax entirely 

 shining; dorsulum, meso- and metapleura almost uniformly closely punctured; 

 ecutellum closely punctured; areola ill defined, nearly one and a half times as 

 broad as long, basal area ill defined and if anything a little longer than the aie- 

 ola, lateral and posterior carina- strong, the petiolarea sharply defined, nearly 

 parallel-sided and forming a shallow channel which is wrinkled, the lateral areas 

 not all present, but the areas that are present are sharply defined and mostly 

 wriokled. Wings almost clear, faintly blackish, stigma and nervures almost 

 black; the areolet with the same proportions as the areolet in I. humphreyi. 

 Abdomen shining, though somewhat dullish owing to the close punctuation; the 

 petiole very even, with hardly any elevations near the apical margin, finely longi- 

 tudinally striate in the middle. Covered with pubescence as in humphreyi. 

 Head, thorax and first abdominal segment black or nearly, with the following 

 pale marks: A triangular spot surmounting each eye at the margin, continued 

 along the eye margin within as a narrow band to the lower margin of the antennal 

 fovea, continued below this point as a broad band to the anterior margin of the 

 clypeus, leaving a black band with sinuate margins and as wide as the middle 

 third of the clypeus in the middle of the face, a long mark on each scape beneath, 

 a large spot on basal half of mandibles, a posterior orbital line extending from 

 the middle of the malar space to above the middle of the eye, superior margin of 

 prothorax, except in the middle, tegulae in part, a transverse line beneath, a 

 longitudinal mark on the anterior face of the mesothorax, coxa? and trochanters 

 of anterior and middle legs with marks, femora and tibi;e of anterior and middle 

 legs in front, faint whitish, citron yellow to whitish, otherwise the legs are dark 

 brown or black, except the anterior tarsi, which are pale brownish beneath; ab- 

 domen dark blackish cyaneus. 



Type: University of Kansas. Type locality : Oak Creek canyon, Ariz. Au 

 gust, 1902, F. H. Snow. 



Ichneumon (Barichneumon) citrinifacialis, n. sp. 



Superficially like I. nanus, scibilis and mucronatus, readily distinguished 

 from nanus, to which it is structurally related, by the distinctly defined petiola- 

 rea, which is lacking in nanus. 



Male. — Length, 6 mm. Head shining; face and cheeks rather closely, dis- 

 tinctly punctured; clypeus sparsely punctured ; malar space nearly as high as 

 the mandibles are broad at base ; scape and pedicellum together a little longer 

 than the first joint of the flagellum (remainder of flagellum broken off); ocelli 

 somewhat more separated than usual and approaching the equilateral-triangle 

 disposition. Thorax shining; dorsulum, mesopleura and metapleura with dis- 

 tinct punctures, more separated on the dorsulum than elsewhere, on the pleura 

 almost contiguous; scutellum rather indistinctly, sparsely punctured ; metano- 

 tum rather distinctly areolated, the basal area not well defined and distinctly 

 broader than long; areola not sharply defined, nearly twice as broad as long, and 

 of the lunate type, petiolarea broader at base than at apex, but nearly parallel- 

 sided, forming a shallow channel, which is indistinctly, traversely wrinkled or 



