NORTH AMERICAN LEPIDOPTERA. 211 



margin at right angles with it. Three cross lines starting from and visible only 

 at costa divide the portion inside of the outer line into nearly equal parts. Two 

 dark brown dashes rest, one between veins 2 and 3, the other between veins 3 

 and 4, and extend out to the outer cross lines. Fringes white, cut with brown 

 at the ends of the veins. The under surface is pale brownish gray. Expands 

 2—2.35 inches ; 50—59 mm. 



Hah. — Cauada to Flurida. 



This species is a variable one ; according to Mr. Koebele, who has 

 raised it in some numbers, it varies considerably. The primaries 

 vary in width (in the sexes?) considerably, and they may be uni- 

 formly ash gray in color. Many specimens have the two black 

 dashes near the middle of the wing ; some have only one ; some have 

 a band of lighter gray across the wings, and some have dark lines 

 and markings ; some, apart from the color of the abdomen, which 

 remains uniform, exactly resemble Sphinx pinastri of Europe. 



The form above described is the most common, though the insect 

 is never abundant. Abbot and Smith have figured the larva of this 

 species on Pimis palustrLs, and represented it with a yellow head, the 

 body checkered with light and dark gray squares. Mr. Koebele has 

 given a more detailed account of the transformations in " Bull. Bkln. 

 Ent. Soc." iv. 20. 



EXEDRIUlfl Grt. 



This genus, so far as I can find, is undescribed. Mr. Grote pro- 

 posed it in his " New Check List" for Mr. Strecker's species Sphiiix 

 halicarnm. This species I saw on one occasion in Mr. Strecker's col- 

 lection, unfortunately without noting its structure. I give Mr. 

 Strecker's original description of the species, which is all I know of 

 it: 



Sphinx halicarnie Strk., Bull. Bkln. Ent. Soc. iii. 35. — " 9 

 expands 2| inches. Upper surface light fawn or drab gray, slightly 

 darker on top of head, thorax and costa of primaries than elsewhere ; 

 towards and at the exterior margin of primaries somewhat whitish, 

 though insensibly blending into the drab of the rest of wing, so as 

 to make no marked difference. A rather short, dark brown streak 

 in the space between the second and third median nervules and some 

 brown on the fringe at termination of the veins is all the attempt 

 nature has made in the decoration of this moth. The secondaries 

 are light brown, paler at and towards the base, and with the fringe 

 white and brown alternately ; under surface light brown or fawn 

 color. 



