4O2 



ENTOMOLOGICAL NEWS 



[Dec., '09 



The regions chosen are shown in the accompanying illustra- 

 tion. ( Fig. i ) . They are : 



1. General surface area, including a vein, A. 



2. Four marginal sections, basal anal. B ; outer anal, C ; central cos- 

 tal, D ; and basal costal, E. 



3. Central basal, F. 



4. Scent pocket, G. 



Widely differing scales occur in these regions. A typical form 

 may be described as a bilaterally symmetrical membranous sac, 

 more or less oval in outline with lobes or apices at the free end, 

 and an indentation, or sinus, at the base. In the center of the 

 sinus is the stalk with its more or less bulbous form fitting 

 into the socket in the membrane of the wing (C. 15). Varia- 

 tions occur in color, in the relative length and breadth of the 

 scale, the number of lobes or apices, the depth of the sinus, and 

 in form itself. Some are nearly triangular, others are unsym- 

 metrical with the sinus much nearer one side than the other. 



Lower surface of forewing of Anosia showing distribution of color and location of the 

 unsymmetrical scales of the "locking device"; u = unsymmetrical scales Mag. 



In color, the wings of Anosia are a deep reddish orange 

 (unshaded in figures 2 and 3), with a wide black border which 

 in the forewings covers a large part of the surface. This bor- 

 der is interrupted by a more or less regular double row of white 

 spots. The brown spots are frequently bordered with white 

 scales, and have white scales interspersed with the brown ones, 

 forming lighter brown areas. (Fig. 2). This is particularly 

 true of the underside of the forewing. The arrangement of 

 the scales is in regular overlapping rows which are approxi- 

 mately perpendicular to the veins. These rows continue regu- 



