ART. 28 CHALCID FLIES NORTH OF MEXICO — BALDUF 83 



setae on the submarginal vein as contrasted with a length of 3 mm. 

 and 12 to 14 setae on the latter vein in foliatae. Both these lots 

 are from cynipid galls on live oak, and when more specimens are 

 reared they may not prove to be separable in the respects stated 

 above, despite the difference in geographical distribution. 



r^/pe.— Female, U.S.N.M. No. 42243, from Fort Grant, Ariz. 



Remarks. — In addition to the type and the allotype, this variety is 

 represented by 5 female and 2 male paratypes reared at Washing- 

 ton, D. C, on April 5, 1882, from unidentified cynipid galls received 

 March 24, 1882, and collected from live oak by H. K. Morrison at 

 Fort Grant, Ariz. Some of the paratypes occur in the writer's col- 

 lection; the rest, together with the allotype, are in the National 

 Museum. The specimens bear numbers 2634°, 2634*^^ ^nd 2634°^ One 

 female (Hopk. U. S. 15604'^), which I have determined as this va- 

 riety, was reared by L. H. Weld, April 29, 1918, from a gall of 

 CalUrhytis 7'uginosus (Bassett), at Prescott, Ariz. Mr. Weld had 

 galls of this species from Q. grisea and arizonica. 



34. DECATOMA WILTZAE, new species 



Nearest to D. marylandica Girault in being mostly back, but has 

 the front and middle legs blacker, is distinctly smaller, and the head 

 is more robust. 



Female. — Length 2 mm., fairly robust, color mostly brownish 

 black, some parts yellow; head brownish black, oral space around 

 base of mandibles brownish yellow ; scape concolorous with face, apex 

 of pedicel yellowish, rest like scape, funicular segments (specimens 

 imperfect) yellowish and lightly infuscate, especially above; thorax, 

 including tegulae, deep brownish black, slightly darker than head, 

 upper front corner of pronotum with a trianguar patch of lemon 

 yellow; front and middle coxae mostly, hind coxae entirely, outer 

 disks of front and middle, and all of hind femora and tibiae, dark 

 brown, except ends narrowly; legs otherwise yellow, tarsi light, 

 approaching stramineous; stigma dark brown, submarginal band 

 rudimentary, propodeum, peduncle and abdomen brown black. 



Head two-thirds as long as broad, subglobose, broadening behind, 

 face from above feebly protruding beyond eyes, receding rather 

 sharply below antennal fossae, eyes and face moderately set off at 

 their junctions, hind edge of head broadly, vertex more sharply, con- 

 vex; malar space behind groove, and cheeks entirely smooth, pol- 

 ished, bare, numerous small umbilicate punctures on vertex and occi- 

 put, face subreticulate and moderately hairy; pedicel half as long 

 as scape, two and a half times as long as its own diameter at apex, 

 and more than twice as long as Fl, Fl not so broad as and slightly 

 longer than F2, F2 and F3 each scarcely longer than wide, rest of 

 antenna not present, but F4 and F5 probably as broad as long; head 



