ART. 28 CHALCID FLIES NORTH OF MEXICO BALDUF 73 



hind edge of head; occiput usually mostly black, this not uncom- 

 monly broadening toward but seldom reaching the vertex except by 

 a narrow, or rarely a broad, longitudinal median band, the band 

 sometimes extending caudad varying in width and length, occasion- 

 ally reaching hind edge of pronotum; mesonotum rarely almost 

 immaculate, usually with a median longitudinal black band varying 

 in width at different points and in a series of specimens, often broad- 

 ened especially on prescutum, sometimes enlarged to a triangle almost 

 coextensive with borders of prescutum and extending forward under 

 pronotum, band more regular on scutel, almost always full length of 

 the sclerite, and usually not broader than half the width of this area, 

 scapulae and axillae immaculate, rarely in part infuscated, sterna of 

 thorax black mostly between coxae only ; anterior portion and groove 

 of propodeum black, often feebly so; legs yellow, coxae concolorous 

 with sides of thorax, rarely the hind pair feebly and partly black- 

 ened, femora slightly lighter, tibiae light yellow, tarsi stramineous ; 

 stigma brown, submarginal band lacking; peduncle black, dorsal area 

 of abdomen narrowly to broadly black with pointed projections 

 extending toward middle of sides, abdomen otherwise ochreous- 

 yellow. 



Head three-fifths as long as broad from above, face broadly 

 rounded, eyes not abruptly separated from front, vertex feebly con- 

 vex, hind edge of head almost straight ; ocellar area finely punctate, 

 malar space smooth, polished, rest of head moderately reticulate- 

 punctate and sparsely and inconspicuously hairy; about two-thirds 

 as long as pedicel and a fifth longer than each of F2 to F5, latter 

 joints subequal, scarcely longer than broad, club not quite so long 

 as F3 to F5 combined, flagellum rather densely hairy; pronotum 

 slightly narrower than head and mesothorax ; pronotum, prescutum, 

 and scutel moderately umbilicately punctate and hairy, mesopleura 

 aciculate and finely punctate; 12 to 14 setae on submarginal vein; 

 groove of propodeum crossed by a rounded carina in front and by 

 feeble rugae on posterior two-thirds; abdomen polished, sparsely 

 hairy on the sides, moderately hairy and punctate in the region of 

 the ovipositor sheath. 



Male.— The male of this species is extremely variable in color. 

 One color variety is being recognized in this sex in addition to the 

 lighter form described herewith. 



Like the female in general, except on the average slightly darker, 

 the occiptal black space usually larger, the scapulae, hind coxae, and 

 abdomen more often partly and more extensively black; pedicel a 

 fourth longer than Fl, latter twice as long as wide, F2 to F4 equal 

 in width and subequal in length, about five-sixths as long as Fl, 

 club slightly longer than F3 and F4 combined. 



