SEKPHOID AND CHALCIDOID PARASITES OF THE HESSIAN FLY 117 



verging striae ; frons and face with sparse pale hairs ; mandibles each with four 

 distinct teeth ; labial palpi 3-jointed, maxillary palpi 4-jointed, the second and 

 fourth joints of the latter much longer than the first or third. Antennae 13- 

 jointed, weakly clavate ; scape cylindrical ; pedicel about twice as long as broad ; 

 two distinct transverse ring joints; funicle 6-jointed, the joints subquadrate; 

 club 3-jointed, ovate, a little broader than funicle, the first and second joints 

 subquadrate, the apical joint smaller and subtriangular ; funicle and club 

 joints each with a single series of elongate sensoria which extend from about the 

 basal one fourth or one third of each segment to its apex; hairs on funicle 

 and club short. Thorax a little over one and one half times as long as broad, 

 tapering from tegulae to apex of propodeum; pro thorax short, conical, a little 

 narrower than mesonotum at tegulae, mostly declivous and without a transverse 

 carina separating the declivous portion from the short dorsal portion ; meso- 

 scutum more than twice as broad as long ; parapsidal grooves impressed an- 

 teriorly, usually faintly traceable for the whole length of mesoscutum but 

 very indefinite on posterior half ; scutellum about as long as mesoscutum ; 

 axillae separated by a distance much less than their own width at base, the 

 groove between axillae and scutellum deep and weakly f oveolated ; sculpture of 

 scutellum and axillae about like that of vertex of head, the mesoscutum with 

 somewhat coarser reticulation ; metanotum forming a narrow transverse smooth 

 band; propodeum about two thirds as long as scutellum, smooth and shining, 

 the median carina and lateral folds strongly developed, spiracular sulci deep and 

 complete; spiracles small and ovate; area between lateral folds of propodeum 

 broad and with a shallow depression at basal margin on each side about half 

 way between the median carina and the lateral fold ; pleura sculptured like the 

 scutellum but with the usual smooth ridge beneath the wings. Legs moderately 

 slender, their tarsi 5- jointed ; hind tibiae with two spurs, one of which is very 

 weak and not easily seen ; hind coxae very weakly sculptured and with a few 

 long hairs dorsally ; front femora and tibiae approximately equal in length; 

 middle and hind femora shorter than their tibiae. Wings extending far beyond 

 the apex of abdomen, about two and one third times as long as broad, evenly 

 cilated from a little beyond apex of submarginal vein to apex of wing, bare 

 ba sally except for a few hairs in the costal cell ; marginal cilia short ; submar- 

 ginal vein twice as long as marginal vein ; postmarginal vein subequal to 

 marginal; stigmal vein half or a little more than half as long as marginal. 

 Abdomen about as long as thorax, petiolate ; petiole about twice as long as 

 broad, reaching approximately to the apices of hind coxae, opaquely granular in 

 sculpture with a distinct median longitudinal carina above ; body of abdomen 

 smooth, short ovate, subacute at apex, broadest at apex of first tergite beyond 

 the petiole, this tergite constituting half or nearly half the length of abdomen 

 exclusive of the petiole, its apical margin often, though not always, with a 

 slight median emargination ; following tergites successively diminishing a little 

 in length, usually more or less retracted into the first segment; ovipositor not 

 exserted. 



Color of head and thorax varying from aeneous to dark green, the lower part 

 of frons and the face usually blackish, and pleura usually less metallic than 

 the dorsum of thorax ; propodeum shining green or brassy ; petiole dull black ; 

 abdomen beyond petiole metallic green or brassy green, the apical tergites 

 sometimes blackish; antennal scape dark metallic with its base more or less 

 testaceous; flagellum and pedicel dark fuscous or brownish black; wings 

 hyaline ; all coxae concolorous with the thorax, their femora and tibiae varying 

 from dark testaceous to strongly fuscous with the apices somewhat paler; 

 tarsi testaceous with the apical joint blackish. 



Male.— Length 1.5 to 1.8 mm. Somewhat smaller than the female, the 

 antenna similar in conformation to that of female, but slightly more slender; 

 maxillary palpi with the two apical segments greatly enlarged to form an ovate 

 vesicle; 'maxillae also enlarged; parapsidal grooves more sharply defined, 

 usually complete but not deeply impressed posteriorly; head distinctly more 

 finely and deeply sculptured than the thorax, especially so on the frons and 

 face ; abdomen shorter than the thorax ; the petiole like that of female ; body 

 of abdomen subtriangular, appearing truncate at apex because of the retraction 

 of the apical segments. Color a much brighter metallic green than in female, 

 the front of head brilliant brassy green to bright blue; antennae yellow, the 

 club and usually the pedicel fuscous ; legs, except coxae, bright yellowish, then- 

 hind femora sometimes slightly fuscous, and the apical joint of all tarsi 

 blackish. 



