INSECUTOR INSCITI^ MENSTRUUS 59 



loi a mixture of white and ochre, with irregular patches of 

 black. There are three very indistinct and broken fasciae 

 of black, intermixed with white scales ; the first extends 

 •obliquely inwardly nearly reaching the fold beyond which it 

 continues half way to the costal margin ; the second begins at 

 the costa one-third from base and continues obliquely out- 

 wardly to near the fold beyond which there is a small patch of 

 the same shading parallel to the first fascia ; the third parallel 

 to the second, and near the middle of the wing, consists of 

 barely more than a patch on the costa and another slightly 

 elongated spot along the fold. Beyond these dark areas the 

 shading is irregularly distributed, giving a very mottled ap- 

 pearance. The apex of the wing is bordered with black ex- 

 tending around the apex and well into the dorsal cilia, there 

 are two black lines in the apical cilia, elsewhere the cilia are 

 gray. Hind wings dark smoky gray, cilia paler. Middle and 

 front legs covered with mixed black and white scales, the tarsi 

 more white inwardly. Hind legs yellow gray, heavily shaded 

 with black. Abdomen smoky gray above, whitish below. Ex- 

 panse, 13 to 14 mm. 



This species is described from one of a series of more than 

 a dozen specimens. Cones collected June 39, 1912, and 

 imagoes issued July 13 to 21, 1912. On the leaves of Fraxinits 

 species at East River, Connecticut. 



This insect has been bred from ash by W. V. Slingerland, 

 at Ithaca, N. Y. (Can. Ent., p. 96, 1893), and by Miss A. F. 

 Braun, near Oxford, Ohio (Can. Ent., p. 160, 1912). In 

 each of the above cases the insect was identified as Coriscium 

 culculipennellum Hb., to which it is indeed very similar. The 

 fasciae are, however, much more broken in the case of fraxinella 

 than in the European species, and lack the white shading, 

 just before the fasciae, which is usually quite evident in the 

 case of the latter. 



Although it is necessary to place this insect under the genus 

 Gracilaria, as it is now defined by Meyrick, the genus Coris- 

 cium not being recognized, it should be noted that it differs 

 very widely from our other species of Gracilaria in its habits 

 in forming its cocoon. This is spun suspended within the 



