ART. 15. REVISION OF ICHNEUMON-FLIES MUESEBECK. 61 



stigma is broad; posterior coxae smooth and shining; posterior 

 femora slender ; spurs of posterior tibiae much less than half as long 

 as the metatarsus; abdomen depressed, ovate, a little shorter than 

 the thorax, and broadest at the base of the third segment ; the first 

 dorsal abdominal plate slender, narrowing gradually posteriorly, 

 distinctly narrower at apex than at base, smootli and very shining, 

 somewhat polished medially ; second dorsal abdominal plate narrow 

 on basal half, broadening suddenly to the lateral margins of the 

 abdomen in the middle of the segment ; the membranous margins 

 along the first and the basal half of the second abdominal plates very 

 broad; second and following tergites smooth and polished; hypo- 

 pygium prominent but not surpassing the apex of the last dorsal 

 abdominal segment; ovipositor sheaths slender, strongly shining, 

 projecting nearly one-fourth the length of the abdomen. Black; 

 palpi dusky at base, labrum and mandibles dark brown; clypeus 

 black; antennae, tegulae and wing-bases black; wings hyaline, the 

 veins, and the stigma entirely, brown ; all coxae and trochanters, basal 

 third of fore femora, basal two-thirds of the middle femora, and the 

 posterior femora entirely, black or blackish; tibiae testaceous, but 

 more or less infuscated on the outer side and at apex ; tarsi fuscous ; 

 abdomen black; the lateral membranous margins on the two basal 

 plates blackish; hypopygium dark brown; ovipositor sheaths brown- 

 ish-black. 



iI/«Z^.— Essentially as in the female. 



Cocooji.—^^ mm. long; smooth, brown, covered with a very little 

 loose silk ; apparently solitary. 



T7/pe locality. — Rocky Ford, Colorado. 



Ty2->e.—Q.2it. No. 24006, U.S.N.M. 



Host. — Plutella ■maculipennis Curtis. 



Described from four females and one male, reared from ihe above 

 host, June 22 to July 18, 1916, at Rocky Ford, Colorado, by H. O. 

 Marsh, under Chittenden No. 1584. 



There are in the United States National Museum four other speci- 

 mens of this species, from Los Angeles County, California, reared 

 from the same host, and one specimen from the C. F. Baker Collec- 

 tion, labeled " Colo. 1228." 



21. MICROPLITIS COACTUS Lur.dbeck. 



ilicropHUs coactus Lundbeck, Vid. Medd. naturb. Foren Kjobenhavn, 1896. 

 p. 243. 

 Type. — I am not sure of the location of the type of this species. 

 It is probably in some European collection. 

 Greenland. 



Host — Noctua, species. 



A small species, apparently very similar to plutellae, from which 

 it can be separated by the characters listed in the key. Mesoscutum 



