AET. 2. ICHNEUMON-FLY GENUS METEORUS MUESEBECK. 23 



15. METEORUS TIBIAUS, new species. 



Closely resembles humilis, but differs in having smoother posterior 

 cO(Xae; in the second abscissa of radius being usually much less than 

 twice as long as first; in the darker posterior tibiae; in the abdomen 

 being usually less strongly petiolate; and in the much longer female 

 antennae. 



Female. — Length 4.5 mm. Head transverse, but rather full be^ 

 hind the eyes; face twice as broad as long between base of antennae 

 and clypeus, weakly roughened; malar space nearly as long as basal 

 width of mandibles; eyes moderate to small, very sparsely pubes- 

 cent; antennae slender, 36-segmented, the first flagellar segment dis- 

 tinctly a little shorter than the second; ocelli small, the ocell-ocular 

 line two and a half times as long as greatest diameter of a lateral 

 ocellus; mesoscutum smooth and shining, wdth only indistinct punc- 

 tures; the parapsidal grooves strongly marked, crenulate, meeting in 

 a small rugulose sunken area just in front of posterior margin of 

 mesoscutum; scutellum smooth and shining with some faint punc- 

 tures; propodeum rugoso-reticulate, with a median longitudinal 

 carina and an irregular transverse carina near base; propleura 

 largely smooth, but more or less crenulate in the depression; meso- 

 pleura smooth and shining, with a curved crenulate furrow and a 

 few punctures on lower half, and with a small roughened area beneath 

 anterior wings; metapleura rugulose; entire thorax covered with con- 

 spicuous whitish pubescence; anterior wing with a large triangular 

 stigma; second abscissa of radius about one and one-half times as 

 long as first abscissa, and two-thirds as long as second intercubitus; 

 third abscissa of radius going almost to extreme apex of wing; recur- 

 rent vein entering first cubital cell near apex; posterior wing with 

 radiellan cell not narrowing apically; nervellus slightly longer than 

 lower abscissa of basella; legs slender; posterior coxae smooth and 

 polished, often weakly punctate outwardly at base; posterior tibiae 

 as long as their trochanters and femora combined; abdomen slender, 

 at least as long as head and thorax combined; first segment two- 

 thirds to three-fourths as long as remainder of abdomen, stouter than 

 is usual in this genus, and not so distinctly divided into a petiole and 

 postpetiole; the entire first tergite, from base to apex, is roughened, 

 largely striate, and is provided v/ith two enormous fossae ver}'- near 

 the base; ventral margins of first tergite widely separated; remainder 

 of dorsum of abdomen smooth and polished; ovipositor sheaths slightly 

 longer than the abdomen. Black; head and thorax wholly black, except 

 the clypeus and mandibles, which are mostly reddish, and the antennae, 

 which are pale brown beneath; wings hyaline; stigma dark brown, 

 with a conspicuous pale spot at base; legs reddish testaceous, the 

 anterior pair palest; posterior tibiae brown, pale yellow at base, and 



