303 
submarginal line is more any dentate* than in nubilalis 
(Fig. 39, b). 
The face is aise more distinctly praduced, than) /in aabiladis, he 
anterior margin being carinate and. more or less distinctly arched. in 
middle, sometimes almost pointed above. The male hypopygium. differs 
from that of nwbilalis in having no thorns above at middle OF claspers 
and the process differently shaped (Fig. ela 
Fic. 42. Smartweed-borer (Pyrausta obumbratilis): male hypopyg- 
ium. one side; median process (right) much more enlarged; and 
(left) dorsal 'plate. 
THE SMARTWEED-BORER 
(Pyrausta obumbratilis Led.) 
Larva.—More slender than either of the other two species and nor- 
mally more conspicuously spotted, the spots larger and darker. 
Differs from nubilalis in having the anterior submedian dorsal spots 
on abdomen separated by less than the diameter of one spot (Fig. 9), 
the ventrolateral spot with a conspicuous lunate black upper margin 
(Fig. 17), the bristles cephalolaterad of the pseudopods differently ar- 
ranged (Fig. 22), and the small chitinized dots on the skin less evidently 
composed of minute contiguous points, the dots being separated on the 
greater portion of the body by less space than the diameter of a dot. the 
series of minute points in the intervening spaces being more complete 
(Fig. 11) ; and the bristles near ocelli (Fig. 25, right side) being differ- 
ently arranged. 
Pupa.—Distinguishable from either of the other two species by the 
prominent protuberance on the head as shown in Figure 38. The apical 
abdominal segment is very similar to that of nwubilalis, but the small 
