236 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. xxxv. 



powderings are simply a little more scattered and are absorbed in the 

 dark ground instead of contrasting with it. In both sexes there is 

 considerable variation in tint, and some females are almost uniformly 

 deep chocolate brown, with darker transverse lines edged with gray 

 atoms. In all such cases the white outer edging of the reniform 

 stands out strongly. There is no other species in our fauna that can 

 t>e confused with this. 



A fine series of 25 males and 23 females collected by Mr. Otto 

 Buchholz gives the greatest range of size and also the longest period 

 of flight, from early July to the middle of August. 



The spinulation of the middle tibia? is very distinct, the spines 

 being large and stout, though few in number, and easily discernible 

 among the vestiture. In the male the mass of specialized scales cov- 

 ered by the femoral fringing forms a great wad that is very conspicu- 

 ous when the middle leg is slightly moved, yet may be so closely 

 appressed to the thorax as to be readily overlooked. 



The abdominal tuftings are much reduced in this species, and in 

 flown specimens they are likely to be totally absent. The genitalia of 

 the male are decidedly asymmetrical, the harpes slender, irregular, 

 and extremely unlike. The uncus is very long, slender, and has a 

 sharply curved very pointed hook at tip. 



In the female there is no apparent modification of the terminal seg- 

 ments on the upper side. On the underside the lobing is incomplete; 

 the plate on the right is fully developed and takes up more than half 

 the segment; the lobe on the left is very much smaller, and while it is 

 fully chitinized along its inner margin, it is not well differentiated 

 outwardly, and seems to merge into the texture of the segment. The 

 opening to the copulatory pouch is at the upper inner margin of the 

 right lobe, but forms no distinct tubular structure. It forms rather 

 a space between the two lobes at that point and all from the lateral 

 margin. There is nothing quite like this in any other of our species, 

 and it seems in a way intermediate between the fully lobed types and 

 such forms us lunata, in which there is no true lobing at all. 



PHffiOCYMA NORDA. new species. 



1904. Homoptera calycanthata Dyab, Proc. U. S. N;it. Mus., XXVI I, p. 870, 

 larva on birch. 



Ground color a rich deep brown, more yellowish in the female than 

 in the male, but varying in depth in both sexes. Head concolorous or 

 with ;i gray frontal spot. Collar with a median black line, with or 

 without an edging of bluish scales. Thorax with a more or less ob- 

 vious transverse gray line across the disc and patagia behind the mid- 

 dle: posterior tuft well marked, sometimes a little gray-tipped. 

 Abdominal tufts well defined in good specimens, but consisting of 

 long upright scales which are easily disturbed and lost, so that the 



