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that none but those carefully killed soon after issuing from the chrysalis 

 show the wings well covered. In such specimens the general color is 

 cinereous, the primaries but slightly darker than secondaries, the scales 

 being narrow and elongate ; mostly gray, but with an admixture of black 

 ones. The exposed membrane of the wing is fuliginous except a narrow 

 discal space and more or less of the costal region which remain sordid 

 white. Fringes paler but sparse and easily lost except at anal angle of 

 hind wings, where they persist. Veins black and strong. Body but 

 sparsely clothed in freshest specimens and soon becoming bare except at 

 neck; highly polished and minutely punctate, and in some specimens 

 with metallic tendency. Head (Fig. 16, ) with the hair pale ferruginous ; 

 eyes brown, naked; labial palpi brownish-black with sparse white scales; 

 maxillary tentacles stout and brown, shorter than tongue : max. palpi nearly 

 as long as tentacle, basal joint stout, rounded, joints 2 and 3 short, sub- 

 equal in length, joint 4 very long, terminal joint with two spines at tip; 

 tongue very stout, long and ferruginous; antenna? black. Thorax with 

 two singular transverse-ovid translucent and somewhat opalescent spots 

 recalling the so-called cenchri of Tenthredinids ; legs stout and dark, the 

 hind tibise and tarsi pale ferruginous. Abdomen separated from thorax 

 dorsal ly by a broad and deep suture which is pale rufous by contrast with 

 the general piceous color; anal joint (Fig. 17, l>, c, d) in 9 rufous, with 

 darker shade at base, the sides compressed from above and expanded into 

 a broad and angulate wing, the borders of which are thickened and stiff- 



Fig. 17. Promiba synthetica : , enlarged view genitalia of $ from side ; 

 &, do., from behind; c, anal joint of female with ovipositor exserted. dor 

 sal view; d, do , lateral view; e, ovipositor, dorsal view, still more 

 enlarged; /", do., from side. 



