294 



ral one. Posterior margins of the fourth to tenth segments inclusive, with a 

 demizone of a straw color, which is connected with a lateral line of the 

 same color, just above the lateral fold. Tail with a transverse, lunate, cas- 

 taueous spot, margined in front with straw color; base of the anal prolegs 

 each with a similar spot and margin. Feet pale castaneous; prolegs green, 

 with two x trans verse series of black hairs. The tubercles all furnish black 

 hairs, longer than those which issue from the skin. Length over two inches. 

 Attitude of this larva when at rest similar to that of the Spldngidce. 



Attaeus Polyphemus Linn. [PI. iv, fig. 17.] 



Found on Tilia americana, Ulmus and other plants. 



Sept. 15, 1823. Found on a rose bush a larva of a green color, with a 

 double row of very small setiferous, orange colored tubercles on each side, 

 between which rows were whitish diagonal lines. It formed its cocoon Sept. 

 17, 1823. Another found in the pupa state in its cocoon in the autumn of 

 1822, became a perfect insect between the loth and 30th of June, 1823. 

 Found the moths in coitu June 20, 1821. 



Attaeus Cecropia Linn. 



Larva fully grown. Head and body pea green; lip tinged with pale blue; 

 feet yellowish green tipped with a few hairs and a black claw. On top of 

 first segment four blue spots, approximated on each side in pairs ; two elon- 

 gated, blue tubercles on each side, armed with two black hairs (the spots 

 not hairy). One stigma on each side of this segment pale blue, edged 

 with a fine black line. Second and third segments having each on the 

 top two light red, spherical tubercles, with a spine on the summit and six 

 spines around it, of a black color, and pointing upwards, with seven or 

 eight obtuse spines surrounding the base; below these tubercles, at the 

 sides, one lesser tubercle, more elongated, of a light blue color, darker at 

 base, and armed with six black spines surrounding a central one; lower 

 down, on each side, two smaller, elongated, blue tubercles, armed with two or 

 three black spines. Fourth segment crowned with two light yellow, spher- 

 ical tubercles, which arc surmounted with about six black spines, and sur- 

 rounded at base with six black spots. At the sides three small, elongated, 

 pale blue tubercles, darker at the base ; the upper one Avith four spines, 

 the next with about three, and the lowest minute with a single hair; a spir- 

 acle between the upper two of these tubercles. Fifth segment with two 

 yellow, elongated tubercles, having about five black spines; three lateral, 

 blue tubercles with one or two spines; a spiracle on each side also. Sixth, 

 seventh, eighth and ninth segments, containing a pair of false feet of a 

 yellow color, with light blue soles or cushions; and on each of these seg- 

 ments two yellow, cylindrical tubercles, armed Avith two black spines; a 



