Dec., '09] ENTOMOLOGICAL NEWS 405 



serve there, too, a similar function. Scales of this type were 

 found in the same two regions in Papilio polyxenes and in 

 Argynnis, and are probably of common occurrence in these 

 regions on butterfly wings. 



The central basal area, F, is characterized by tufts of hair- 

 like scales both simple and plumose (F. 38-40, Plate III). 

 These hairlike scales are also sparsely scattered along the 

 veins A 9, and occur with the fringe scales at the margin. 



The "scent pocket" alluded to, is located on vein Cubitus 2. 

 It is illustrated as region G. This pocket, black in color, is a 

 conspicuous characteristic of the male of Anosia plexippus. 

 Within it, are the most remarkable scales of the wing, the an- 

 droconia. They are connected with the scent glands whose 

 secretion is poured out over the surface of the scales. From 

 the nature of these scales, Dr. W. A. Riley suggests as a name 

 for the pocket, "murotheca," which means perfume box. The 



Upper surface of hind wini; of Anosia showing unsymmetrical srales u and tin.- muro- 

 theca ni. Mag. x 1%. 



androconia are needle like in shape (G. 42-43). They are 

 scattered amongst small black scales about 0.07 mm. in length, 

 which have usually an entire margin. Scudder describes both 

 of these forms as androconia. 



These companion scales present a noteworthy appearance 

 (G. 44-45). Their characteristics are their small size and ir- 

 regular arrangement. All the scales described above are 



