AST. 15. REVISION OF ICHNEUMON-FLIES — MUESEBECK. 69 



from the collection of the American Museum of Natural History 

 I have seen specimens from Hornerstown, Forest Lawn, and Nyack, 

 New York. 



29. MICROPLITIS CONFUSUS. new species. 



Closely resembles kewleyi in size and general appearance, and in 

 the cocoons. It differs from that species in the first abdominal plate 

 being distinctly no broader at apex than at base, and more rugulose, 

 also in having usually a conspicuous testaceous band across the ab- 

 domen covering the 2nd and 3rd tergites. 



Female. — Length, 2.3 mm. Face, vertex, temples, cheeks entirely 

 confluently punctate and dull; antennae a little shorter than tho 

 body; mesoscutum, like the head, confluently punctate, except for 

 a narrow, transverse, slightly elevated line along the posterior mar- 

 gin; parapsidal grooves wanting; scutellum small, flat, very weakly 

 punctate, shining; mesopleurae mostly highly polished, with a lon- 

 gitudinal crenulate furrow below; propodeum coarsely rugose, with 

 a median longitudinal carina ; fore wings rather narrow ; stigma 

 large, much longer than the metacarpus; radius short, hardly as 

 long as the first transverse cubitus, sometimes distinctly shorter; 

 hind coxae finely granular at base ; hind tibial spurs much less than 

 half as long as the metatarsus; abdomen a little shorter than thorax, 

 narrow at base, broad and much depressed posteriorly ; the first dor- 

 sal plate nearly parallel-sided, the sides bulging slightly a little be- 

 yond the middle, base and apex apparently of equal breadth, mostly 

 finely rugulose or ruguloso-striate ; second tergite not distinctly sepa- 

 rated from the third, and like the following segments, smooth and 

 polished; hypopygium not surpassing the apex of the last dorsal 

 segment ; ovipositor hardly exserted. Black ; head and thorax black ; 

 labrum and palpi testaceous; basal three-fourths of antennae testa- 

 ceous to brownish, apical fourth usually fuscous; tegulae and the 

 wing bases, and the four anterior legs, pale; posterior coxae black- 

 ish; the hind femora, hind tibiae except base, and the hind tarsi, usu- 

 ally more or less infuscated; wings hyaline, veins and stigma light 

 brown, the latter with a large transparent spot at base; abdomen 

 black, with the second tergite and most of the third usually reddish- 

 testaceous, the broad membranous margins along the apical third of 

 the first plate dingy yellowish; venter of abdomen yellowish on 

 basal half, blackish beyond. 



Male. — Like the female except for the longer antennae and the 

 darker second and third abdominal tergites. 



Cocoons. — 2.5 mm. long; light brown, not fluted, and with a very 

 small amount of loose silk ; gregarious. 



Type locality. — Port Huron, Michigan. 



Tyj)e.—C2it. No. 23999, U.S.N.M. 



