AMERICAN LEPIDOPTERA. 33 



It is not unusual to find washed-out examples of untennata doing 

 duty as imimoda, and occasionally a well-marked unhnoda gets into 

 the antennata series. The latter species, when it has lost the basal 

 black streak is sometimes difficult to distinguish ; but it always has 

 a certain rough, powdery appearance that marks it a stranger at 

 once to the smooth soft tint of the present species. 



Xylina laticiiierea Grote. 



1874, Grt, Bull. U. S. Geol. Surv., ii, 27, Lithophane. 



1882, Eiley, Papilio, ii. 102, an var. antennata. 



1883, Hy. Edw., Papilio, iii, 135, larva. 



1891, Butler, Entomolog-ist, xxiv, 242 ^ antennata. 



1893, Smith, Bull. 44, U. S. Nat. Mus., 229. Xylina, sp. dist. 



Head, thorax and primaries powdery, dark, ashen gray. Abdomen and s«<-- 

 ondaries pale smoky, the former without dorsal tuftiugs, the latter with paler, 

 white-tipped fringes. Head with the usual blackish line, tuftings not well de- 

 fined. Collar with black or blackish line below tip. Thoracic crest low, but in 

 good examples obviously divided. Primaries with all the marking present, 

 blackish, diffuse and not conti-asting. A blackish line from base to basal half 

 line, inclosing a paler or whitish costal patch. Basal line geminate, usually com- 

 plete or broken only on the subcostal vein. T. a. line geminate, oblique, a little 

 outcurved in the interspaces, inner line more even and a little diffuse. T. p. line 

 geminate, ex.serted over the cell, a little drawn in below, more or less denticulate, 

 especially opposite the cell, outer line more even and diffuse, included space a 

 little paler. S. t. line pale, not contrasting, broken, preceded by sagittate spots, 

 which usually form the most prominent feature of the wing maculation. A series 

 of blackish terminal lunules, the veins being also black marked. The median 

 shade is not prominent, rarely even well marked, but it is usually obvious, dif- 

 fuse, angulated in the lower portion of the reniform. Claviform outlined by 

 black scales, small, pointed, often lost in the powdering, never prominent or dis- 

 colored. Orbicular round or oval, oblique, distinctly paler than the remainder 

 of the wing and therefore a little contrasting. Suborbicular well marked in most 

 specimens, of good size, annulate with paler scales. Reniform obscure, moderate 

 in size, upright, with an interrupted pale annulus, inferiorly better defined and 

 tending to form a heel toward the base. Beneath, primaries dusky, except along 

 costa and terminal space where it is gray, powdery, an obscure discal spot present 

 in most cases. Secondaries pale, powdery, with a blackish exterior line and a 

 large discal spot. 



Expands 43 48 mm. ^ 1.72-1.92 inches. 



Hab. — Canada ; New England States ; Northern New Yoi-k ; 

 New Jersey ; Illinois ; Volga, South Dakota. 



Twenty specimens, representing both sexes, are before me and 

 form an aggregation separable with comparative ease from gyotei, 

 by the absence of all red. scales on the primaries, by the more 

 diffuse and more obvious maculation and by the somewhat contrast- 

 ing, pale orbicular. There is not much real variation save that due 



TRANS. AM. ENT. SOC, XXVII. (5) AUGUST, 1900. 



