194 THIRTIETH REPORT ON THE STATE MUSEUM. [821 



XIV. ON SOME NEW SPECIES OF CERURA. 



Cerura occidentalis n. sp. 



Head white. Palpi white, blackish laterally. Antennae 

 white with black pectinations. 



Collar pale cinereous, traversed by a darker band and edged 

 behind by a black band. Tegulse pale cinereous, darker pos- 

 teriorly ; the narrow black band crossing their front, followed 

 by a patch of orange scales, and a few black scales on their 

 inner side. Thorax marked with black and orange bands of 

 raised scales (apparently three orange bands).* 



Abdomen above cinereous, the segments bordered behind 

 with pale cinereous ; beneath whitish : sides tufted with a 

 lateral row of small black spots. 



Primaries whitish basally, sprinkled with some black hairs ; 

 medially and terminally pale cinereous with more numerous 

 black hairs. A black basal dot on the subcostal ; an extra- 

 basilar row of five black spots on the nervures, usually, in 

 the males, in a straight line (5 examples), but sometimes the 

 two superior are nearer the base (2 examples)-)*; in the ? 's (5 ex- 

 amples) the two superior spots are considerably drawn in 

 toward the base, the line presenting quite a curve costally. 

 The median band of black and a few orange scales, paler than 

 in borealis and aquilonaris, broadest on the costa, elsewhere 

 of nearly uniform width ; its black borders subparallel ; the 

 inner border more distinctly marked ; its general course in the 

 male, direct or slightly excavating the band below the median, 

 while in the female it is conspicuously bent, on or below the 

 same nervure ; the outer border usually not well defined below 

 the submedian fold. Behind the median band, a black trans- 

 verse line, interrupted on the cell and indistinct over the sub- 

 median fold. On the discal cross-vein, an elongated black 

 spot. Beyond this, two or three subparallel crescentiform 



*A cabinet specimen of this species is rarely seen, in which the thoracic scales 

 have not been so affected by greasing, that the bands can with difficulty be traced . 



fin five examples of the European bifida, this line curves outwardly at the 

 costal or on the inner margin ; in one example (female) it is straight. 



