MO LEPIDOPTERA. 



Genus 1. MACROGASTER. 



Antennse short, pectinated to the middle in the male ; 

 wings narrow ; abdomen very long. 



1. M. arundinis, Eilh. ; castaneae, Stand. Cat. — 

 Expanse \\ to 2 inches. Forewings drab-brown with a darker 

 longitudinal shade; hind wings paler; abdomen drab, long, 

 very so in the female. 



Antennas rather short, in the male with long pectinations 

 at the base, rounding off regularly shorter to just beyond the 

 middle, from which point they disappear, and the remainder 

 is almost threadlike ; in the female slightly dentated. 

 Thorax narrow, brownish drab ; abdomen of nearly the same 

 thickness, long in the male, extremely so in the female, 

 whitey-brown ; anal segment tipped with along tuft of scales. 

 Forewings long and narrow, with rounded apex and blunt 

 hind margin ; colour pale ashy or greyish white, regularly 

 dusted with dark grey in lines of obscui'e cloudy dots ; 

 nervures light brown ; costal margin broadly, and dorsal 

 margin still more broadly pale brown with a yellowish gloss ; 

 cilia pale brown dotted with dark grey. Hind wings 

 narrow, shorter than the forewings ; white, faintly dusted with 

 brownish ; cilia whitish brown. Female similar but larger. 



Underside of the forewings smoky, with the margins and 

 nervures pale brown, hind wings whitish, with pale brown 

 nervures ; body and legs whitey-brown. 



Apparently not variable, except in size. 



On the wing in June and July and in some seasons even in 

 Auj?ust. 



'O' 



Larva 1^ to 2 inches long, rather slender, slightly flattened) 

 of nearly uniform thickness but with the thirteenth segment 

 long and tapering. Head horny, rounded, flattened ; yellowish 

 brown; dorsal shield pale brown, broad and deep, rounded 

 behind and there furnished with rows of projections ; body 



