ART. 28 CHALCID FLIES XORTH OF MEXICO BALDUF 25 



b}^ J. H. Pollock, at Colorado Springs, Colo., presumably from galls, 

 on Q. gamhelii. These Hopkins materials for the most part have the 

 wing band somewhat less expanded on the sides than those of the 

 types, but are obviously the same species. All the material of this 

 species at hand to date is from the Southwestern States — Texas, New 

 Mexico, Arizona, and Colorado — and judged by the degree of devel- 

 opment of the wing band, this species has evolved farthest in the type 

 locality. The specimens from the more northern and western States 

 approach D. flava Ashmead, from which disholcaspidis differs only 

 in the enlarged submarginal band. 



8. DECATOMA MIMOSAE, new species 



Nearest to D. flava. Ashmead in having the body almost entirely 

 3'elloAv, but differs from it in being somewhat smaller, in having the 

 distal margin of the submarginal band more strongly produced and 

 rounded and noticeably more constricted necklike at the stigmal vein. 

 and in the possession of only 9 to 11 setae on the submarginal vein. 



Female. — Length, 2.4 mm., almost entirely golden or yellowish 

 brown; head entirelj- golden brown or lightly infuscate, ocelli red- 

 dish, antennal scrobe ochreous-yellow, scape light j'^ellowish brown, 

 pedicel medium to darker brown, its apex above lighter, Fl and club 

 moderately dark brown, rest of f unicle di^inctly lighter brown ; 

 prothorax golden yellow, mesonotum light reddish brown tinged with 

 yellow, disks of scapulae and axillae faintly brown, mesopleura con- 

 colorous with pronotum, groove and upper anterior portion of pro- 

 jjodeum brown black; legs mostlj'^ a shade lighter than mesopleura, 

 hind femur faintly brown on outer disk, middle and hind tibiae me- 

 dium brown or dusky on outer faces, tarsi stramineous ; submarginal 

 band medium light brown, the stigmal vein conspicuously dark brown 

 through the stigma, band with a prominent neck, or outer basal shoul- 

 der of band widely separated from free portion of stigmal vein, 

 distal margin rather sharply rounded and reaching distinctly beyond 

 apex of stigmal club, proximal margin straight and slightly distad 

 of base of stigma, band about a fourth longer than its maximum 

 width; peduncle and abdomen varnish brown, lightly tinged yellow, 

 the venter feebly lighter, slightly darker on the middle above than 

 on sides. 



Head three-fifths as long as wide, front fairly prominent trans- 

 versely above antennal fossae, broadly and uniformly rounded, occi- 

 put rather strongly concave, eyes and front not sharply set off at 

 their juncture; small areas behind anterior and laterad of posterior, 

 ocelli only fineh^ punctate, rest of ocellar area moderately umbili- 

 cately punctate, punctures smaller and more shallow than on thorax, 

 more numerous on occiput and antero-laterad of ocelli, cheeks 



