1865.] 315 



Descriptions of North American LEPIDOPTERA— No. 6. 



BY AUG. R. GROTE, 



Curator of Entomology. Buffalo Soc. Nat. Science.-. 

 (Communicated Jan. 9th, 1865.) 



CALL ALT/CIA. no v. gen. 



Head moderate, rather small as are the eyes which are not very full ; 

 clypeus globose, swollen, projecting in front; two ocelli, before and 

 between which the epicranium is roundedly elevated, rising to a ridge 

 behind; maxillae moderately developed, when unrolled not so long as 

 the thorax. Palpi slender, extending beyond the head, held nearly 

 horizontally and on a plane with the body, third article somewhat de- 

 pressed, not pointed. Antennas of the male somewhat shorter than 

 those of the female, finely bipectinate, the pectinations tapering just 

 before the tip and are more separated and fewer compared with the 

 male antennae in Ctemccha. In the female the pectinations are stouter 

 and shorter, bearing terminal setae. Legs unarmed and finely scaled. 

 Abdomen somewhat exceeding posterior wings, quite similar in external 

 conformation in both sexes. 



Anterior wings more than twice as long as broad, costal margin 

 straight, slightly depressed before costal angle, external margin rounded, 

 not very oblique, internal margin straight. Discal space open, sub- 

 costal nervure arcuated before the apex, crowding the nervules together; 

 first and second s. c. nervules approximate at base, third being short 

 throwing off a brauchlet just before the margin, second thrown off be- 

 fore the fifth on the opposite side of the vein, while in Otenucha it 

 arises much beyond; apical interspace widening towards costa. fifth s. c. 

 nervule thrown oft' directly from the nervure not removed as in Ctenu- 

 chn towards the middle of the discal area. First and second median 

 nervules united at base, second greatly nearer the first than the third, 

 which latter is bent downwards, fourth much removed from third. 

 .Sub-median nervure perfectly straight and parallel with internal margin. 



Posterior wings 9-veined ; discal space partially closed, the vein be- 

 coming towards the center a mere thickening of the membrane. The 

 costal nervure is perfectly straight, sending off immedi- 

 ately at base the upper discal nervure which is slighter, 

 nearly straight and throws off a nervule near external 



marein. Lower discal nervule (median) nearly straight; 



Posterior wing ° . . 



of Callalucia, the third m. nervule springing from the second, its origin 



natural size, removed further towards the external margin than that 



of the first. Sub-median nervure curvilinear, much removed from 



