110 ZYG^ENIDiE AND BOMBYCID^. 



three modern genera Drepana, Platypteryx and Cilex, which correspond 

 to his sections A, B and C. Schrank had previously created the genus 

 Drepana, with D.fakataria, which belongs to Laspeyres' section A, as 

 the type. This name has therefore priority, while Laspeyres' name has 

 been retained for section B, to which P . laceriinaria and P. bilineata 

 belong. 



Three species of this genus are found in the United States ; D. arcu- 

 ata and D. genicula in the Atlantic States, and D. siculifer in Califor- 

 nia. They are so closely allied that it is difficult to present their dis- 

 tinctive points in a tabular form. 



l.-DREPANA SICULIFER. (PI. 4, fig. 11, ? .) 



3 . ? . — Head pale rusty brown, darker on the vertex. Palpi 

 concolorous. Thorax and patagia very pale, nearly white, the latter 

 hairy. Abdomen smooth, rather darker. Legs pale rusty brown. 



Anterior wings very pale brownish white, with a faint purplish tinge 

 centrally. An oblique cloudy rusty brown band, originating at the 

 outer third of the inner margin, and going direct to the apex, followed 

 externally by the following markings in the order named ; first, a narrow 

 pale line; secondly, a dusty clouded band sinuated on the outer edge ; 

 thirdly, a sinuated pale band, and fourthly, a sinuated dark powdery 

 band nearly parallel with the outer margin, between which and the 

 outer margin the wing is pale. The apex of the w-ing outside the 

 principal oblique band is purplish black. Inside this band there are 

 three dusky sinuated transverse lines, equidistant from each other on 

 the inner margin. The first is near the base, somew^hat curved out- 

 wardly ; the second is nearly parallel to the first and produced outwardly 

 into acute angles on the median and subcostal veins ; the third is 

 parallel to the main band and before reaching the cosla is bent back 

 at a very acute angle reaching the costa two-fifths from the apex. 

 Outside this line on the costa are two indistinct oblique lines directed 

 towards the apex. Costa tinged with rusty brown, more distincdy so 

 near the apex. At each end of the discal vein is a small blackish dot 

 and a third in the discal area. The spot at the junction of the discal 

 and median nervules is sometimes enlarged and more diffuse as in the 

 figure, and as was also the case in the type of the species as described 

 by Mr. Packard. Fringes rusty brown, pale outwardly, darkest near 

 the apex. 



Secondaries very pale, nearly white, with dark submarginal sinuated 



