448 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. 55. 



Legs black except at knees which are testaceous. 



Antennae: First fimicle plus ring-joint one and one-half times as 

 long as pedicel; none of the funicle joints quadrate; club joints not 

 quadrate and about the same width as funicle joints. Scape black. 



Species ranges from small to mxdium in size. 



Males. — Unknown. 



Redescribed from man}^ females reared in cages under artificial 

 conditions and from siDecimens reared from stems of species of Ely- 

 mus from practical!;/ all over the United States, and from the type in 

 the United States National Museum. 



This species inhabits the center of the stem and breeds only in 

 spurs of Elymus. It probably occurs wherever Ehjriius normally 

 grows. It is normally thelyotokous, males never having been ob- 

 served. 



HARMOLITA BROMICOLA Howard. 



Plate 40, fig. 6; plate 43, fig. 9; plate 45, fig. 6. 



Isosoma hromicola Howakd, U. S. Dept. Agr., Div. Ent., Bull, tech, ser. 

 No. 2, p. 18, 1SSM>. 



Howard's original description is as follows: 



Female. — Length 3.1 mm. ; expanse, 4.6 mm. Punctuation of head, pronotum, 

 and mesonotum (praescutum) like that of H. maculata, which it also resembles 

 in the large pronotal spots. Metanotum (propodeum) with a distinct, strongly 

 emarginate, central, longitudinal groove, the space either side finely granulate, 

 with occasional irregular carinae. Abdomen longer than thorax; segment 2 

 as long as 3, 4, and 5 together; 5 and 6 subequal. Antennae rather long and 

 straight; pilose; joint 1 of funicle only slightly longer than joint 2; club 

 not quite as long as three preceding joints together, strongly flattened from side. 

 Face very slightly pilose; metanotal (propodeal) fimbria sparse. The whole 

 insect is smaller, slenderer, and more delicate in appearance than any except 

 grandis form niinuta. 



Male. — Length, 1.9 mm.; expanse, 3.4 mm. Petiole short, not as long as 

 first abdominal segment and scarcely as long as hind coxae; scape of antennae 

 slightly widened ; funicle joints very slightly rounded above and very slightly 

 pedicellate; each more than twice as long as pedicel and each faintly con- 

 stricted in middle ; club divided into two pedicellate joints as with H. captiva. 

 All legs black with light yellow knees. 



Supplementary to Howard's description : 



Female. — Praescutum reticulately lineolate, very smooth, almost as 

 smooth as H. grandis. Pronotal spots very large, sometimes almost 

 meeting on the anterior margin of the prothorax. Propodeum with 

 a continuous narrow, shallow, margined, central, longitudinal groove ; 

 marginal carinae parallel and regular. There is a large semicircular 

 granulose area laterad of groove. Abdomen about equal to head and 

 thorax combined and is very slender lanceolate; segments irregular 

 in length; 2 may equal 3, 4, and 5 combined or may only equal 3 

 and 4 ; segments 3 to 7 may gradually increase in length or they may 

 be approximately the same length. Fimbria not prominent. 



