NO. 2281. A REVISION OF CHALCID-FLIES— PHILLIPS AND EMERY. 461 



deep the middle and hind legs are very black, Propodeum usually 

 granulose within and laterad of groove ; sometimes rugose laterad of 

 groove; cross rugae inconspicuous in anterior portion of groove. 



Abdomen equal to or longer than head and thorax combined ; seg- 

 ment 2 equals one-fifth to one-fourth the length of the abdomen ex- 

 clusive of segment 1 ; 3 shortest ; 4 to 7 vary greatly in length. 



Legs: Basal one-half of upper faces of front, basal one-third of 

 lower and basal two-thirds of upper faces of middle and the hind 

 femora and middle and hind tibiae fuscous; front tibiae, all knees, 

 and other portions of femora tectaceous. 



Antennae: First funicle plus ring-joint longer than pedicel; none 

 of the joints arc quadrate; club slightly broader than the three pre- 

 ceding segments. Scape black. 



Species medium to large in size. 



Male (pi. 48, fig. 2). — Length, 2.5 mm. Praescutum as in female. 

 Pronotal spots occupying one-half to two-thirds anterior dorsal mar- 

 gin of prothorax, and usually bright. 



Propodeal groove deep anteriorly, generally complete; propodeum 

 either granulose or rugose laterad of gi'oove and within the posterior 

 part of the groove. 



Petiole not quite as long as hind coxae; granulose. 



Legs: Front femora piceous in basal half; hind and middle legs 

 piceous except at knees ; front tibiae dusky to reddish-brown. 



Antennae : Flagellum with pedicel about same length as head and 

 thorax combined; scape distinctly broadest in distal half and near 

 the distal extremity there is a distinct shoulder; distinctly broader 

 than first flagellar joint ; one-third as wide as long, exclusive of base. 



Type-locality. — La Fayette, Indiana. 



Type.—Q^i'. No. 21764, U.S.N.M. 



Described from many females and males reared in cages under 

 artificial conditions and from specimens reared from stems of species 

 of Elymus collected in Indiana and Virginia. 



This species makes very conspicuous galls usually at the second or 

 third internode from the base of the plant and breeds only in species 

 of Elymus. It has proven to be arrhenotokous under control condi- 

 tions, but in nature both sexes regularly occur. 



HARMOLITA ATLANTICA, new species. 



Plate 39, fig. 1 ; plate 43, fig. 15 ; plate 46, figs. 2, 4. 



Female. — Length 3 mm. Praecutum rugolose. Pronotal spots 

 large, occupying about two thirds anterior dorsal margin of protho- 

 rax ; often obscure or dull. 



Propodeum with, rarely without, a continuous, broad, shallow, 

 median, longitudinal groove; groove often margined only in its 

 anterior half, though just as often it has marginal carinae through- 



