AKT. 15. REVISION or ICHNEUMON-FLIES MUESEBECK. 47 



Mesopleurae largely opaque, with only a small subquadrate polished area; 

 posterior coxae and more or less of the dorsum of abdomen usually 

 testaceous ; venter of abdomen always testaceous ; length usually 3.5 mm. 



32. maturus Weed. 



1. MICROPLITIS STIGMATICUS. new Bpecies. 



Closely resembles coloradensis^ from which it differs in the first 

 dorsal abdominal plate being distinctly narrower at apex than at 

 base, in having the mesoscutum and scutellum less coarsely roughened, 

 in the paler legs, and in the stigma being pale at base. 



Female.— Li&)a.gi\\ 3.2 mm. Face very weakly indistinctly punc- 

 tate and shining; antennae very slender," a little longer than the 

 body ; vertex, temples, and cheeks indistinctly punctate and shining ; 

 mesoscutum shallowly, confluently punctate ; parapsidal grooves not 

 distinct ; scutellum very weakly punctate, shining ; mesopleurae punc- 

 tate anteriorly and below the rather short, finely crenulate, longi- 

 tudinal furrow, highly polished above it; propodeum sloping grad- 

 ually from base to apex, finely rugulose, and provided with a median 

 longitudinal carina; stigma exceedingly broad and about as long 

 as metacarpus ; radius straight and perpendicular to anterior margin 

 of stigma, longer than the first intercubitus ; legs slender ; posterior 

 coxae nearly half as long as the thorax, and finely granular above ; 

 inner spur of middle tibiae shorter than middle metatarsus; inner 

 spur of posterior tibiae half as long as posterior metatarsus; ab- 

 domen slender, a little shorter than the thorax ; first dorsal abdominal 

 plate distinctly narrowing to apex, at least twice as long as broad 

 at base, smooth and polished on basal half, finely rugulose beyond; 

 second dorsal abdominal plate long, very weakly roughened, rather 

 shining, and provided with two longitudinal grooves medially ; pos- 

 teriorly the second tergite is decidedly emarginate ; the membranous 

 margins along the two basal plates very broad ; third and following 

 tergites smooth and shining; hypopj^gium not surpassing the last 

 dorsal segment; ovipositor sheaths short. Black; palpi pale; an- 

 tennae brownish-black; tegulae and wing-bases very pale yellow; 

 wings hyaline; costa and base of stigma yellow; legs pale yellow, 

 except the posterior coxae which are black, and the apex of posterior 

 femora, base and apex of posterior tibiae, and more or less of pos- 

 terior tarsi, which are dusky ; abdomen black ; the membranous mar- 

 gins along the first and second dorsal plates yellow ; venter of ab- 

 domen yellowish on the basal half or two-thirds. 



Male. — Essentially as in the female. 



Type.— In the collection of Dr. C. T. Brues. 



Type-locality. — Mount Constitution, Washington. 



Allotype locality. — Moscow Mountain, Idaho. 



Paratype localities. — Moscow Moimtain, Idaho, and Vancouver, 

 British Columbia. 



20107— 22— Proc. N. M. vol. 61 21 



