772 M. W. R. de V. GRAHAM 



the U.S.A. in 1905, from Europe, and might be the same as Masi's nidulans ; it is 

 not the true nidulans [=hemipterus (Walker)]. 



As some confusion has arisen over the identity of hemipterus, I give a redescription 

 of the species : 



$ (macropterous form). — Green to blue- or bronze-green. Antennal scape fuscous, more or 

 less testaceous proximally ; pedicellus black or fuscous ; flagellum brown to fuscous, often 

 rather paler distally and beneath. Coxae concolorous with the thorax ; legs otherwise testa- 

 ceous with the tips of the tarsi brown ; femora sometimes more or less infuscate. Tegulae 

 testaceous to brown. Wings hyaline or faintly yellowish ; veins yellowish testaceous. Length 

 1-6-2-3 mm. 



Head in dorsal view (Text-fig. 628) 2-2-1 times as broad as long ; temples from one fifth to 

 nearly one quarter as long as eyes, converging strongly ; ocelli very small, POL 1-3-1-5 OOL. 

 Head in frontal view transversely oval with the vertex rather strongly arched, genae converging 

 strongly though very slightly buccate. Eyes 1-3-1-35 times as long as broad, separated by 

 only 1-1-1-25 times their length, their inner orbits tending to converge slightly ventrad. Malar 

 space 0-35-0-4 the length of an eye. Mandibles small, the left one with 3 teeth, right with 4. 

 Antennae inserted distinctly above the level of the ventral edge of the eyes, though their toruli 

 are slightly nearer to the anterior margin of the clypeus than to the median ocellus ; combined 

 length of pedicellus and flagellum slightly less than breadth of head ; scape fully three quarters 

 as long as an eye, reaching nearly to level of vertex ; pedicellus nearly twice as long as broad, 

 slightly longer than anelli plus first funicle segment ; flagellum proximally about as stout as 

 the pedicellus, thickening somewhat distad ; first funicular segment usually as long as the 

 second but sometimes very slightly shorter, subquadrate ; segments 2-4 often quadrate but 

 sometimes very slightly transverse, 5 and 6 slightly transverse ; clava 2-1-2-5 times as long as 

 broad, nearly as long as the three preceding funicular segments together ; sensilla rather 

 sparse, especially on the proximal segments of the funicle. 



Thorax about 15 times as long as broad. Pronotal collar weakly and irregularly margined 

 or immarginate, usually with only a narrow shiny strip (sometimes absent) along its hind edge. 

 Mesoscutum about twice as broad as long, finely reticulate ; notauli rather shallow. Scutellum 

 about as long as mesoscutum, slightly broader than long, moderately convex, very finely 

 reticulate, especially the frenum. Propodeum about three quarters as long as scutellum ; 

 median area 1-25-1-5 times as broad as long ; median carina usually indicated, sometimes 

 strong ; plicae distinct throughout, but sharp only posteriorly ; panels of median area finely 

 though strongly reticulate, nucha more coarsely so, the latter occupying nearly half the length 

 of the propodeum ; spiracles small, short oval, separated by slightly less than their length from 

 the metanotum ; callus sparsely pilose, especially posteriorly where there are usually no (at 

 most 2) hairs above the supracoxal flange. Legs rather short, not slender, the femora relatively 

 stout. Fore wing 2-3-2-5 times as long as broad, reaching at least slightly beyond the tip of 

 the gaster ; basal cell and basal vein bare or virtually so ; speculum open below ; marginal 

 vein 1-8-2-25 times as long as the stigmal vein ; postmarginal vein distinctly shorter than the 

 marginal. 



Gaster ovate, acute apically, somewhat longer than thorax, as broad as or slightly broader 

 than the latter, 1-6-2-1 times as long as broad ; basal tergite occupying slightly more than one 

 third the total length ; last tergite slightly shorter than its basal breadth ; tips of ovipositor 

 sheaths just visible in dorsal view ; tergites 3 (basal tergite), 4 and 5 smooth or with some very 

 weak alutaceous sculpture along their bases, bare except laterally, 7 more or less alutaceous, 8 

 and 9 wholly so. 



$ (brachypterous form). Wings more or less shortened and narrowed, with their apical 

 portion, beyond the stigmal vein, relatively shorter than in macropters ; marginal, stigmal, 

 and postmarginal veins thickened, the stigma larger than in macropters. In specimens having 

 the shortest wings, the forewings reach only to the middle of the gaster and may be fully 3 

 times as long as broad. 



