22 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.xxi. 



DEMAS FLAVICORNIS Smith. 



(Plates IX, fig. 9, male; fig. 10, female adult; XVI, figs. 2, 3, 4, venatiou; XVII, 

 fig. 8, legs; XIX, fig. 6, male genitalia.) 



Dcmas flavicornis Smith, Bull. Bkln. Ent. Soc, 1884, VII, p. 3, 

 Demas propinquilinea Smith, Bull. 44, U. S. Nat. Mus., 1893, p. 32. 



Ground color a very pale dusty gray, on which all the markings are 

 obscurely defined. Antennae of male yellow, head otherwise immac- 

 ulate. Collar smoky tipped. Disc of the thorax smoky and patagiae 

 with a smoky tip and cross band. Primaries with the ornamentation 

 smoky and in very slight relief. Transverse anterior line narrow, 

 single, almost upright or even inwardly oblique, with a single outward 

 tooth below the cell to meet a similar process from the transverse pos- 

 terior line. Transverse posterior denticulate and a little outcurved 

 over the cell, then with a deep incurve to meet the spur from the 

 transverse anterior line. The inferior inclosed median space is usually 

 the darkest part of the wing. Subterminal line denticulate, ])arallel 

 with the outer margin and shading insensibly into the palest ground 

 color inwardly. Terminal space dusky, ending in a broken dusky ter- 

 minal line, which is preceded by pale lunules. Orbicular round, brown 

 ringed, with a pale center. Eeniform narrow, upright, incompletely 

 outlined in smoky. Secondaries thinly scaled; whitish in the female, 

 blackish in the male. Beneath gray to smoky, with a vague outer line 

 and discal spot. 



Expanse, 1.10 to 1.75 inches (27 to 44 mm.). 



Habitat. — Newark, New Jersey, in May; Albany, New York, May 

 12; Long Island, New York. 



In this species the male is much smaller, darker, and more obscurely 

 marked than the female. As a whole the space beyond the middle is 

 distinctly paler th^n toward the base, and this, with the united median 

 lines, will serve to identify the species. 



In a general way this species resembles the propinquilinea of Grote, 

 and I was so often informed in letters that my name was a synonym 

 that I accepted the fact after an examination of Mr. Grote's material 

 in the British Museum, in which only one form is represented. Com 

 paring the true propinquiUyiea with the real flavicornis, side by side, 

 proves them abundantly distinct, though both have yellow antennae. 

 The sexual structures are also sufficiently distinct, so that my name 

 must be reinstated. The range of this species is probably similar to 

 that of propinquilinea and is certainly much greater than above 

 given. 



