AMEHICAN nY.MKXOPTKRA. 147 



12. Pimpla annulicornis, Walsh, M.S. — J. — Black, shining; very nai-row 

 anterior orbits, tegulre and apex of scutellums, wliite ; palpi pale: antennre 

 pale lufeous, with incisures of joints black ; wings hyaline, stigma black, 

 wliitish at base, areolet small, subtriangular ; legs yellowish-red, anterior coxaj 

 black with apices pale; jiosterior tibia; black with broad white annulus, three 

 basal joints of tlieir tarsi yellowish, with apices and two apical joints black; 

 metathorax with short pale pubescence, bicarinate on disk; abdomen broad, 

 very closely and deejily punctured, incisures deep, first segment bicariua/e 

 above. Length 5J lines. 



The % has white face, clypeus, mandibles, palpi, scape beneath, four anter- 

 ior coxae and base of legs beneath ; wings beautifully iridescent, areolet minute ; 

 three basal joints of posterior tibia; white tipped with black; abdomen very 

 densely punctured and with short glittering white pile. Length 4J lines. 



Hah. — Pennsylvania, 9 j Illinois, % . Differs from pictlcornh by 

 the immaculate mesothorax, different ornamentation of posterior legs 

 and by the abdomen being more distinctly, less confusedly, punctured. 

 The antennae of both species are colored much alike. 



14. Pimpla incompleta, n. sp. — J. — Black, shining; clypeus piceous ; palpi 

 whitish ; aiiliMiiia; rufo-testaceous, slender; head and thorax smooth and 

 polished; wuigs hyaline, iridescent, nervures and stigma pale brown, areolet 

 moderately large, 5-angular, the outer nervure entirely obliterated ; legs yel- 

 lowish-red; annulus on middle of intermediate tibia; and base of tarsal joints, 

 white: posterior tibice black, with. a broad white annulus about the middle, 

 their tarsal joints pale, tipped with black; abdomen broader than usual, 

 closely punctured, with apical margins of segments smooth; on second and 

 three following segments a transverse depression, deeper laterally and produc- 

 ing a transverse swelling which is more feebly punctured and more shining 

 than the surrounding surface; the apical segments smootli and polislied. 

 Length 2J lines. 



//a/>.^Illinois. A very small species, easily distinguished by the 

 incomplete areolet of anterior wings. The shape and sculjlture oi'thc 

 abdomen is similar to that of pterdas, Say, but proportionally broader, 

 with the lateral swellings more prominent. 



IG. Pimpla. alboricta, n. sp. — %. — Black, shining ; clypeus, middleof mandi- 

 bles, palpi, two basal joints of antennre beneath, tegiilfe, spot before, four anter- 

 ior coxa;, all the trochanters and four. anterior tibijE and tarsi, white; posterior 

 coxae and all the femora yellowish-red ; posterior tibiae wliite, with spot near 

 base and apical fourth black, as also tips of their femora; their tarsi black, the 

 first, except tip, and base of remaining joints more or less, white; wings hya- 

 line, iridescent, nervures and stigma black, areolet minute, petiolated, obli- 

 quely linear; head and thorax smooth and polished ; mesothorax j)romincntly 

 trilobed anteriorly; metathorax with a central longitudinal channel ; abdomen 

 long and narrow, more or less tinged with brown, distinctly punctured, ajiical 

 margins of segments smooth and polished, lateral swellings j)rominent, fii'st 

 segment with two prominent longitudinal carinae, apical segment acuminate, 

 smooth and shining. Length 34 — 4 lines. 



Jlab. — Pennsylvania; Delaware. Readily distinguished from all 



