A REVISION OF THE DELTOID MOTHS S>nTH. 93 



the median vein aiul curves outwanlly to the suhincdiaii vein, where it 

 IS practically lost, the inner niar<;iii bein^- pale to the transverse poste- 

 rior line, which also is faint in this i)ortion of its course. The median 

 si)ace is dark brown above the submedian vein, contrastiiii;- w ith the 

 white. lines defining- it. 



In B. bdltinioralis the transverse posterior line is irregular, out- 

 wardl}' bent over the cell, thence very oblicpie and irregular to the 

 submedian vein. 



In 7>. biJi((/((Us the transverse i)osterior line is nearly upright, with a 

 single sharp outward tooth opposite the cell. 



B. sciitellaris has the median lines complete, white, the transverse 

 anterior outwardly oblique, the transverse posterior nearly as in />'. hiju- 

 galh, but more uneven. The contrasts are not as great as in the other 

 species, yet, in the female especially, the median space is distinctly 

 darker, and in the same sex the subterminal space is white or gray, 

 while it is more smoky in the male. 



i>. ahalinealis has the wing- more uniform in color, but with contrast- 

 ing white transverse lines, of which the transverse posterior makes a 

 long outcurve at its middle, making the median si)ace usually wide. 

 Beyond this the wing is more or less mottled with bluish white. 



In the second series the median lines are much more even, not white 

 or contrasting, while the median space does not contrast solidly with 

 the rest of the wing, the tendency in this series being to lose the lines 

 altogether. Two divisions are indicated by palpal structure, the usual 

 form being stout, obli(]ue, and only moderate in length, while iu two 

 sjiecies they are straight and very long-, equaling head and thorax 

 combined. 



Of the first division of the second series the best marked is B. dccvp- 

 talis, which has both the median lines pale, the transverse posterior 

 with a single small outward bend over the cell, which is not infrequently 

 wanting. In the female the color is quite decidedly paler, and beyond 

 the transverse i)osterior line the wing is (piite strongly powdered with 

 bluish white. The male is smoky brown throughout, yet even here there 

 is a bluish tinge marked through the outer part of the wing. To this 

 species comes B. pcruiuiulalis^ Harvey, which is, from the description, 

 a male form, and agrees with Walker's variety ;/ from the descrii*tion. 



Allied to the preceding is 7>. niadefacfalis Guenee, which is based on 

 a female afterwards described as />. damnosalis by Walker, and II. acha- 

 fiiialis by Zeller. The male has been named -/>. cadncalis by AN'alker 

 and B. profecia by Mr. Grote. It is darker in both se.xes than />. decep- 

 talis, the transverse anterior line nearly or quite obsolete, the trans- 

 verse posterior line rarely pale edged, rather marked by the slight con- 

 trast between the more even median space and the more or less violet or 

 bluish tinged subterminal space, with a small outward angulation on the 

 median vein and another in the submedian iuterspace. This character 

 is constant in both sexes, though often ol)scured iu the male, which is 

 very dark smoky brown, and also the most robust of t)ur species. 



