ABT. 28 CHALCID FLIES NORTH OF MEXICO — -^BALDUF 43 



It is possible that this is a distinct species, but it has been reared 

 from the same lots of galls from which some of the dubla material 

 came, and there is some evidence that duhia proper and its variety 

 rufosa intergrade in color. A larger series, especially additional 

 material from the States intermediate between Illinois and Alabama, 

 is needed to determine the extent of the color variation. There are 

 no recognizable differences in size, sculpturing, vestiture, or dimen- 

 sions of the head or dimensions of the antennal segments. 



15. DECATOMA DUBIA var. DOANEI Fullaway 



Plate 2, Figuee 14 



Decatoma doanei Fuixaway, Journ. New York Ent. Soc, vol. 20, pp. 279, 280, 

 1912. 



Most like the typical D. duhia Walsh in color, size, dimensions of 

 the head and the antennal segments, and form of the submarginal 

 band ; it is darker and smaller on the average, and usually has fewer 

 setae on the submarginal vein. 



Female. — Length 3.2 to 4 mm., colors yellow and black, mostly 

 black; head black, circumocular space and an oblique band from it 

 to antennae, malar area, and face below antennal fossae and at times 

 above them halfway to vertex, yellowish to reddish brown; scape 

 dark yellow, in part lightly infuscate, pedicel yellow like scape, but 

 mostly brownish black above, flagellum dark chestnut-brown; pro- 

 thorax always mostly black above, its sides and anterior face more 

 or less yellowish brown, sometimes a black spot in the lateral depres- 

 sion, on some specimens a faint line of this color from near middle 

 in front obliquely to front end of parapsidal grooves; mesothorax, 

 metathorax, and propodeum black, except mesopleura, tegulae, and 

 narrow area at lower edges of scapulae and axillae, which are 

 reddish brown; coxae black except sometimes the apex, or a stripe 

 on posterior lateral face, outer disks of fore and middle femora, all 

 of hind femora except ends, and front tibiae usually brownish 

 yellow, middle tibiae lightly to moderately brown on outer face, 

 and hind tibiae brown except at base and apex, tarsi light to whitish 

 yellow; stigma dark brown, submarginal band medium brown, 

 slightly more than twice as long as wide, width not quite uniform, 

 but not much broader or more narrow than length of stigma, apex 

 curving strongly toward base of wing, distal edge reaching almost 

 or quite as far as stigmal vein, apex rounded ; abdomen black, only 

 antero-ventral portion more or less yellowish brown. 



Head moderately hairy, very nearly twice as broad as long, face 

 almost flat or slightly convex, vertex weakly convex, occiput slightly 

 concave, malar space smooth in groove only, rest finely coriaceous or 

 sculptured like face, vertex in part around anterior ocellus only 



