450 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.55. 



distal extremity of the penultimate joint which has only one. Scape 

 scarcely three times as long as broad, exclusive of base. 



Eedescribed from females and males reared in cages under arti- 

 ficial conditions, and from specimens reared from stems of species of 

 Bromus collected from many of the States east of the Mississippi 

 River, and from the type in the United States National Museum. 

 The males heretofore never have been described. 



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

 {Bromus secalinus) and other species of Bromus. It probably occurs 

 wherever Bromus grows, which is pretty much all over the United 

 States. It has proven to be arrhenotokous under control conditions 

 though in nature both sexes regularly occur. 



HARMOLITA AGROPYROPHILA, new species. 



Plate 39, fig. 7 ; plate 43, fig. 11 ; plate 45, fig. 19 ; plate 47, fig. 8. 



Fe7Jiale.— Length 2.5 mm. Praescutum reticulat^ly lineolate and 

 usually without broad shallow impressions. Pronotal spots large, 

 occupying from one-half to two-thirds anterior margin of the pro- 

 thorax, 



Propodeum with a distinct, narrow, continuous, median, margined, 

 longitudinal groove, which contains numerous cross rugae; spiracu- 

 lar carinae often weak and not prominent and spiracular area often 

 not well defined; area laterad of groove rugose and occasionally 

 granulose ; fimbria not prominent. 



Abdomen shorter than head and thorax combined ; segment 2, some- 

 times as long as 8, 4, and 5 combined and occupies about one-third the 

 length of the entire dorsal surface ; 7 usually longer than 6 ; 3 always 

 shorter than 7. 



Legs black except at knees which are testaceous. 



Antennae: First funicle joint plus ring-joint usually only slightly 

 longer than pedicel; neither club nor funicle joints quadrate; club 

 joints broader than funicle. Scape black. 



Species ranges from minute to medium in size. 



Male (pi. 47, fig. 8). — Length 2 mm. Praescutum as in female. 

 Pronotal spots small but visible from above, occupying less than one- 

 half the anterior dorsal margin of the prothorax and are bright. 



Propodeum either rugose or granulose, with or without a continu- 

 ous groove. 



Petiole nearly twice as long as broad. 



Legs black except at knees which are testaceous. 



Antennae: Flagellum and pedicel shorter than head, thorax and 

 petiole combined ; halves on first joint of flagellum same length as the 

 last joint of antennae. Last joint ends in a rather conspicuous spur, 

 which may vary from 2 to 4 times as long as broad; scape dis- 

 tinctly broadest near base and much broader than the first flagellar 



