NO. 1977. MONOGRAPH OF THE SIGNIPHORIN^—GIRAULT. 229 



2. Posterior wings very broad, distinctly broader than their longest marginal cilia; 

 fore wings with a delimited clear rounded area against the marginal vein. 



Fore wings with a large smoky area crossing them at the apex of the marginal vein 

 and a rectangular smoky area under all of the submarginal vein proximad of its 

 bend, the area then extending disto-caudad to about a point on the midlongi- 

 tudinal line of the wing and nearly reaching a reciprocal extension from the 

 middle smoky area, these two extensions inclosing a rounded subhyaline area 

 against the marginal vein. Marginal cilia at apex of fore wing only slightly 

 more than a third of that wing's greatest width. Robust, black. 



maxima Girault. 

 Posterior wings only moderate in width or moderately narrow, distinctly nar- 

 rower than the length of their longest marginal cilia, or slightly more or less 

 than subequal in width to them but usually much narrower; fore wings nearly 

 entirely smoky or smoky at proximal fourth or proximal half, without a 

 delimited clear area under the marginal vein. 



Fore wings wholly smoky except at apex; discal bristle present. Longest 

 marginal cilia of fore wing equal to about three-fourths or somewhat more of 

 that wing's greatest width; tarsi brown, excepting proximal three joints of 

 caudal tarsi pulchra Girault. 



Fore wings the same in regard to fuscation but the smokiness is deeper from base 

 out to the end of the marginal vein, the whole divided somewhat distad of the 

 middle of the wing by a moderately broad subhyaline band which is nearly 

 uniform in width and joins the costal margin at the end of the stigmal vein; 

 tarsi and legs, except caudal femur, pallid yellow; djgcal bristle absent. 



australica Girault. 



Fore wings with the major portion hyaline; discal bristle absent. Only the 

 proximal fourth (out to base of marginal vein) of the fore wing smoky; longest 

 marginal cilia of fore wing only about two-thirds the wing's greatest width; 

 tarsi pallid to tip noacki Ashmead. 



Fore wings smoky at proximal half (to end of marginal vein) . Longest marginal 

 cilia of fore wing about half that wing's greatest width nigrella Girault 



II. unifasciata group. 



Like the preceding group but marked with silvery white or yellowish white. 

 The following species: unifasciata Ashmead, bifasciata Ashmead, fasciata Girault, 

 melancholica Girault, and hyalinipennis Girault. The following table should enable 

 the identification of these forms: 



Body immarked save for a transverse whitish band across the thorax at scutellum. 



The inner margin of the stigmal vein forms either a long or short concave curve 



with the inner margin of the marginal vein at apex; discal bristle present. Tip 



of stigmal vein pointing distad. 



Fore wings fumated out to the end of the venation; marginal cilia at apex not 



more than a third of the fore wing's greatest width. Curve of inner edge of 



stigmal vein shorter and more concave fasciata Girault. 



Fore wings nearly hyaline, only a slight suffused cloudiness present proximad; 

 marginal cilia at apex nearly a half the fore wing's greatest width; curve formed 

 by inner edge of marginal and stigmal veins long and shallow. 



hyalinipennis Girault. 

 The inner margin or edge of the stigmal vein does not form a regular concave curve 

 with the inner margin of the marginal vein but the latter is straight, the stigmal 

 vein ciuved caudo-distad forming an obtuse angle with the marginal vein. 

 Discal bristle absent. Tip of stigmal vein pointing disto-cephalad. 

 Fore wings fumated only out as far as the middle of the marginal vein (or at proxi- 

 mal third) ; marginal cilia of fore wing at apex equal to about half of the greatest 

 width of that wing unifasciata Ashmead. 



