NORTH AMERICAN ACROLOPHIDAE — ^HASBROUCK 655 



the same appearance in size and general habitus, with both exhibiting 

 short labial palpi and naked eyes. In addition, their great similarity 

 in regard to genital structm-e indicates that they are very closely 

 related. 



On the basis of the material at hand, sinclairi sinclairi and sinclairi 

 nelsoni should be considered distinct. However, in the event that 

 transitional forms are found to occur between the two, and this is 

 Dot entirely unlikely, the resulting single species would certainly 

 exhibit an unusual amount of variation or instability in regard to 

 antennal structure. This subspecies is named for the Ralph W. 

 Nelson family of Chicago. 



40. Acrolophus quadrellus (Barnes & McDunnough) 



Figures 186-189 



Pseudanaphora quadrellus Barnes & McDunnough, 1913, Can. Ent., vol. 45, 

 no. 12, pp. 420-421, pi. 16, figs. 1, 2, Dec. (fig.l, type cf ; fig. 2, type 9). 



Acrolophus quadrellus Barnes & McDunnough, 1917, Check List Lep. Bor. Amer., 

 p. 191, no. 8194. — Barnes & Lindsey, 1921, Contrib. Nat. Hist. Lep. North 

 Amer., vol. 4, no. 4, pi. 40, fig. 7. — McDunnough, 1939, Check List Lep. Can. 

 & U.S. Amer., p. 104, no. 9584. 



Barnes and McDunnough's original description follows : 



Pseudanaphora quadrellus — cf. — Antennae very sHghtly serrate below, palpi 

 upturned, roughly haired, brown; thorax chocolate-brown; primaries chocolate 

 brown shaded with pale ochreous especially along inner margin and termen; costa 

 with alternate striae of chocolate-brown and ochreous; slight ochreous tinge in 

 cell; dark discocellular dash; inner margin broadly ochreous, more or less striate 

 with brown, upper edge of this ochreous stripe irregular with prominent blunt 

 tooth of ground-colour projecting downward towards middle of inner margin; 

 before and after this tooth the margin is rounded, bent sharply upwards beyond 

 origin of vein 3 as far as vein 7, bending again at right angles and attaining termen 

 below apex, forming a large subquadrate terminal ochreous patch; faint terminal 

 row of dark dots; fringes checkered brown and ochreous with pale basal line. 

 Secondaries pale smoky brown with ochreous terminal hne and checkered fringes. 

 Beneath smoky brown, costa of primaries apically ochreous with 3 or 4 brown 

 striae, narrow terminal ochreous line, secondaries and fringes as above. 



9 . — Palpi short, hairy, porrect; primaries more uniform chocolate brown with 

 only faint traces of ochreous along inner margin; a paling of the ground colour 

 represents the quadrate terminal patch so prominent in the <^. Expanse d^ 25 

 mm. 9 28 mm. 



Habitat: Palmerlee, Ariz. 7 cf , 3 9 • Types, Coll. Barnes. 



The species is allied to daviselhis Beut., but should be readily distinguished by 

 the dark apex and subquadrate ochreous terminal patch with sharply defined inner 

 edge. The males vary in the amount of brown striations on the ochreous area; 

 in some there are scarcely any, in others they show a tendency to obscure this 

 area more or less completely. 



Male genitalia. — Vinculum typical, as in other species, well 

 sclerotized. 



