542 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. 55. 



two tergites rufous at base and apex, black in iLe middle, tliiid en- 

 tirely rufous, fourth entirelj^ black, sometimes with more or less red- 

 dish reflection ; pale color of head and thorax testaceous rather than 

 yellow ; legs ruf o-testaceous, front pair the palest, tarsi especially of 

 hind legs infuscate, as are also the hind tibiae at apex; antennae 

 paler beneath at base but not at apex; nervellus strongly broken, 

 subdiscoideus distinct; abdomen not compressed at apex; face im- 

 maculate. 



Female. — Length, 7.0 mm. ; antennae 6.0 mm. 



Head behind eyes nearly as broad as eyes, temples very strongly 

 convex, polished; malar space very short, granulate; frons granulate 

 and sparsely punctate; face densely punctate; clypeus sparsely punc- 

 tate, transversely roughened ; thorax subpolished, slightly coriaceouslj'^ 

 roughened; notauli distinct anteriorly; scutellum sparsely punctate; 

 propodeum strongly coricaceous, the lateral carina very strong pos- 

 teriorly but obsolete before the round spiracles, medially transversely 

 rugose, the rugae forming a more or less distinct apical pseudocarina, 

 the median longitudinal carinae more or less distinct ; abdomen mi- 

 nutelj^, reticulately roughened basally, polished apically ; first tergite 

 about half as wide at apex as long, its sides nearly straight, dorsal 

 carinae nearly parallel and extending about two-thirds of the way 

 to apex, lateral carinae strong and complete to apex, spiracles at the 

 middle, those of second tergite at basal third; nervulus slightly 

 postf ureal; nervellus broken at to considerably below middle; dis- 

 cocubitus very strongly bent at middle, the second discoidal cell 

 barely a third as wide at base as at apex; legs slender. 



Black w^ith legs largely and abdomen partly reddish; clj^peus, 

 mandibles, tegulae, and humeral angle of pronotum flavous; max- 

 illary palpi pale at base, blackish at apex; antennae dark fuscous, 

 scape and first few joints of flagellum paler below; legs reddish 

 testaceous, the tarsal joint except at base and hind tibia at apex 

 infuscate; wings hyaline, veins and stigma brown, veins flavous at 

 base, stigma pale at base and apex ; abdomen black with third tergite 

 entirely and first and second at base and apex rufous. 



Host. — Ametastegia gldbrata Fallen. 



Tij lie-locality. — "Wenatchee, Washington. 



Type.— Cat. No. 21707, U.S.N.M. 



Described from seven females reared under Quaintance No. 14066 

 by Mr. E. J. Newcomer, of the Bureau of Entomology. 



In this series there is some variation in size, the smallest being 5 

 mm. long. The greatest variation in structure is in the arrangement 

 of the rugosity of the propodeum. In some of the specimens the 

 median carinae extend to the apex and the petiolar area is not defined, 

 while in others the apical carina is dissipated into a number of 

 irregular rugae. The color variation is slight, consisting principally 



