ICHNEUMON-FLIES, PART 2 1 ACAENITLNAE 565 



abdominal tergites, ivory; wings subhyaline, the front wing with a 

 broadly crescent-shaped infuscate area on its apex. 



Female: Black. Much of front orbit, area surrounding mouth, 

 basal 0.6 of mandible, palpi, broad subapical band on flagellum, 

 tegula, sometimes spot on subtegular ridge, postscutellum, more or 

 less of scutellum, front and middle legs except for much of their coxae, 

 upper side of their first trochanters, and hind side of their femora 

 except at base and apex, ivory; extreme apex of hind coxa, front side 

 of hind first trochanter, most of hind second trochanter, small extero- 

 basal spot on hind femur, extreme apex of hind femur, basal 0.65 of 

 hind tibia, and all of hind tarsus, ivory; wings subhyaline, the front 

 wing with a broadly crescent-shaped infuscate area on its apex; 

 apical margin of first four tergites more or less ivory. 



This species is very close to Arotes amoenus and may prove to be a 

 subspecies of it. 



Specimens: 9, Bilby, Alta., June 20, 1924, G. Salt (Washington). 

 d 1 , Agassiz, B. C, May 14, 1926, R. Glendenning (Ottawa). 9, 

 Courtenay, B. C, July 21, 1930, J. D. G. (Ottawa). 2d 1 , Cultus 

 Lake, B. C, July 13 and 14, 1948, H. R. Foxlee (Ottawa). 9, Cultus 

 Lake, B. C, July 21, 1948, H. R. Foxlee (Ottawa). 29 (type and 

 paratype), Mission, B. C, July 1904 (Washington). d\ Itasca Park, 

 Minn., June 22, 1934, C. S. Li (St. Paul), tf, Itasca Park, Minn., 

 June 23, 1933, L. W. Orr (Townes). 9, Yankee Bend, Sask., July 11, 

 1926, N. J. Atkinson (Ottawa). 



This species occurs from Minnesota to British Columbia. 



3. Arotes decorus (Say) 



Figure 328,a 



Acaenitus decorus Say, 1836, Boston Journ. Nat. Hist., vol. 1, p. 248 (Leconte 

 ed., vol. 2, p. 702); ?, (d" misdetermined) . Type: 9, Indiana (destroyed). 



Front wing 10.5 to 12.5 mm. long in male, 12 to 13 mm. long in 

 female; female flagellum about 0.93 as long as front wing; upper hind 

 third of pronotum with medium sized punctures separated by about 1.5 

 their diameter; metapleurum with medium-sized punctures that are 

 separated by about 0.6 their diameter; second segment of hind tarsus 

 about 3.7 as long as deep in male, about 2.7 as long as deep in female; 

 ovipositor sheath about 1.35 as long as front wing. 



Black. Face, frontal orbit, cheek, temple (for its entire width at 

 and below the middle, for part of its width above), clypeus, labrum, 

 basal 0.45 of mandible, palpi, lower side of antenna of male, part of 

 lower side of scape and pedicel of female, broad postmedian band on 

 flagellum, lower half of propleurum, broad anteroventral and narrow 

 upper margin of pronotum, tegula, subtegular ridge, lower part and 

 most of front part of mesopleurum, marginal stripe on lower side of 



