74 THE CANADIAN ENTOMOLOGIST. 



short points. The moth appears early in spring and is probably double 

 brooded, as Mr. Fred. Tepper, in the Bulletin of the Brooklyn Ent. Soc, 

 Vol II., page 4, speaks of the moth in August. 



ON CERTAIN FORMS OF NORTH AMERICAN NOCTUID^, 



INTERESTING FROM THE STRUCTURE OF 



THE CLYPEUS AND TIBI^. 



BY A. R. GROTE. 



The following genera seem to fall in between Heliothis and Plusia. 

 They appear to be distinctively American, and there is nothing like them 

 in the European or Asiatic faunae, so far as appears in literature. The 

 white species inhabit the West and South-west ; and the fore wings are 

 remarkable for their lustre, the markings consisting often of black dots, in 

 this recalling Emydia and certain Lithosians. 



Bessula Grote. 



Vestiture hairy. Eyes naked. Front full, without excavation or 

 tubercle, the infra-clypeal plate prominent. Tibise.spinose, the fore tibiae 

 with a claw. Thorax untufted. Antennae simple. Fore wings dull. 

 Aspect of the Arctiid genus Pareuchaetes. One species from New 

 Mexico, Luxa, Grote. Primaries very light and fady yellow. The t. p. 

 line indicated by a curved series of faint ochrey dots. Two cellular dots 

 and one or two more in place of t. a. line. Beneath costa and apices 

 dusky yellowish. The coloring is very pale and the dotted markings tend 

 to become lost. Consult : Papilio, I., 176. 



Antaplaga Grote. 



Vestiture scaly. Eyes naked. I'ore tibiae with a stout claw. Front 

 with a protuberance rising from the lower margin of a rim-like excavation 

 jutting out from above the infra-clypeal plate. Primaries white, silky, 

 shaded outwardly transversely with olivaceous fuscous, the dark ground 

 color cut by the whitish subterminal line. In shape the fore wings widen 

 outwardly, the apices are produced and the costal margin is long ; the 

 external margm very oblique and the internal margin comparatively 

 short. One species from Colorado, Dimidiata Grote, Can. Ent, 9, 71. 



