362 AMERICAN LEPIDOPTERA. 



cies more like the conradi type, and the locality is out of range for 

 any known species of this genus ; which is of course no valid argu- 

 ment against such a form occurring there. I have been unable to 

 get track of the type. It is not in the Cambridge Museum as 

 Morrison states, and there is no record apparently, of its ever having 

 been there. It may be that Mr. Morrison failed to return the exam- 

 ple after describing it, and later disposed of it elsewhere. Until it 

 turns up or until an insect from Nevada occurs which fills all the 

 requirements of the description, the name must stand " unknown " 

 in our collections. 



EXPLANATION OF PLATES. 



PLATE IX. 



Fig. 1. — Orthosia crispa, genitalic structure of male from beneath, with harpe and 

 clasper of one side removed ; uncus spatulate. 



" 2. — Orthosia ralla, genitalic structure of male from beneath, uncus divided, 

 the tips divaricate. 



" ,S. — Xanthia flavago, genitalic structure of male from beneath, with harpe 

 and clasper of one side removed; uncus divided, the tips widely di- 

 varicate. 



" 4. — Orthosia ferruginoides, abdomen of male from beneath showing hair pen- 

 cils in position. 



" 5. — Orthosia ferruginoides, part of the inner wall of male abdomen with 

 muscular tissue removed to show the case in which the hair pencil is 

 concealed. 



" G. — Orthosia ferruginoides, part of male abdomen from above, with hair pen- 

 cil partly withdrawn from its case, showing also the openings on the 

 second and third abdominal segments. 



" 7. — Orthosia ferruginoides, the hair pencil and its pedicel fully separated 

 from the male abdomen. 



" 8. — Orthosia ferruginoides, disc of the pedicel to which the hair of pencil is 

 attached : very greatly enlarged. 



'"? Orthosia ralla, the hair pencil of male, separated from the abdomen. 



PLATE X. 



Fig. 1. — Harpe and clasper of male Orthosia ferruginoides. 



" 2. — " " " " deeipiens. 



" 3. — " " " ■' acta. 



'• 4. — '' '' " " verberata. 



" 5. — " " " " straminea. 



" 6. — " " " " antapica. 



" 7. — " " " " fornica. 



'' 8. — " " " " aggressa. 



" 9. — " " " " euroa. 



" 10. — " ■* " " duscata. 



" 11. — " " " " inops. 



