30 



Hind wings white in female, slightly yellowish in the 

 male. 



Habitat. Ontario, Maine, Massachusetts, New York, 

 New Jersey, Pennsylvania, Georgia, Texas, Illinois, Cali- 

 fornia, Vancouver Island, Venezuela, Mendocino. 



" Egg. Creamy white in color when first laid, quickly 

 changing to a scarlet and then to an intense geranium red ; 

 just before hatching the blackish head of the embryo shows 

 through the thin shell very distinctly. Form nearly oval ; 

 size, .51 mm. by .39 mm. The egg-shell is quite fragile, 

 and frequently collapses when the larva leaves it. There 

 are twenty-two longitudinal ridges and numerous smaller 

 transverse ridges. The circular markings around the micro- 

 pyle are very characteristic. 



" Larva , First Stage. Head diameter, .21 mm. ; body 

 diameter, .18 mm. ; length, 1 mm. Head a brownish black, 

 clypeus yellowish, antennae nearly colorless ; scattered hairs 

 occur on the head ; thoracic shield brown, with a reddish 

 tinge from the body contents ; body a variable red, the color 

 being the most intense in the thoracic region ; there is a 

 slight stigmatal line ; tubercles blackish and bearing dark 

 hairs ; prolegs almost rudimentary. When about a month 

 old the larvae are 1.5 cm. long; the head is yellowish, with 

 irregular black markings; the body is brown, with large 

 blackish tubercles. When about six weeks old the larvae 

 are 3 cm. long and quite stout ; the color has not changed." 

 (Felt.) 



CRAMBUS UNISTRIATELLUS. (Plate I., fig. 6.) 



Crambus unistriatellus, Pack., Pr. Bos. Soc. N. H., Vol. XL, 



p. 54 (1866). 



Crambus exesus Grote, Can. Ent., Vol. XII., p. 16 (1880). 

 Crambus exesus Grote, N. A. Ent., Vol. I., p. 68, Plate V., 



fig. 7 (1880). 

 Crambus unistriatellus Felt, Grass-eating Ins., p. 85 (1894). 



Expanse of wings, 25 mm. Head, palpi and abdomen very 

 pale gray ; palpi long, slender, acute ; thorax and fore wings 

 golden yellow, with metallic lustre. A broad, uninterrupted 

 silvery-white band on each side, with a few dark scales, ex- 

 tends to the outer edge of the wing, expanding upwards on 



