GRATTOLITHA. 249 



a-. Fore wing with black streak below end of cell. 

 «•! Fore wing with the cilia intersected by fuscous 



streaks lapidea 



h^. Fore wing with the cilia not intersected by 



fuscous streaks longior. 



b^. Fore wing without black streak below end of 

 cell. 

 a^. Fore wing violaceous grey tinged with brown . contenta. 

 U^. Fore wing blue-grey. 



a^. Fore wing with the ground-colour whitish 



blue-grey imella. 



b*. Fore wing with the ground-colour fuscous 

 blue-grey. 

 a^. Fore wing with the costal area irrorated 



with white merceda. 



b". Fore wing with the costal area not irrorated 



with white un imoda. 



h^. Fore wing with dark streaks on the veins. 



a". Fore wing with the orbicular and reuiforiu more 

 or less distinctly deflned. 

 a?. Fore wing bkie-grey. 



«■'. Fore wing with oblique medial dark shade 

 from costa. 

 «'5, Fore wing with the orbicular well defined 

 and connected with a mark below cell. 

 a^. Fore wing with the medial shade entire, vertina. 

 b^. Fore wing with the medial shade from 

 costa to median nervure onlj% 



a". Fore wing pale blue-grey ancilla. 



li'. Fore wing slightly suffused with 



fuscous Jiolocinerca. 



h^. Fore wing with the orbicular hardly 

 defined and not connected with a mark 



below it fletclieri. 



b^. Fore wing without medial dark shade. 



a-'. Fore wing with the dentate marks before 



subterminal line prominent gcorgi. 



b^. Fore wing with the dentate marks before 



subterminal line slight emarginata. 



b^. Fore wing whitish grey oregonensis. 



b". Fore wing with the orbicular and reniform 



obsolete merci. 



c. Fore wing without black streak below base of cell. 

 a'-. Fore wing with the orbicular and reniform present 



but not defined itaia. 



b'. Fore wing with the orbicular and reniform obsolete, fagina. 



2396. Graptolitha semiusta. (Plate CII. fig. 4.) 



Lithophane semiusta, Glrote, 6th Eep. Peab. Acad. Sci. p. 34 (1874) ; Smith, 

 Cat. Noct. N, Am. p. 228. 



Head and thorax ferruginous red mixed with grey ; abdomen 

 pale rufous irrorated with dark brown. Fore wing pale greyish 

 almost entirely irrorated and suffused with bright rufous ; subbasal 

 line represented by a pale striga from costa ; antemedial line defined 

 by greyish on inner side, waved ; orbicular and reniform with 

 whitish annuli defined by rufous, the former round, the latter 

 somewhat constricted at middle ; a slight medial shade ; post- 



