May 1S91.] 



PSYCHE. 



81 



flat in front, dead brownish black, the lower 

 part paler and mottled centrally in front with 

 a paler color. Antennae white ; labrum and 

 ocelli brown; width of head 1.3 mm. Cervi- 

 cal horns thick, heavily spinose, brownish 

 black; several rows of minute piliferous 

 tubercles on the body ; tails spinose, dark 

 red-brown, twice broadly annulated with 

 yellowish and tipped with the same color. 

 Body green, a purple-brown subdorsal line 

 on each side which passes to the spiracles on 

 joints 7 and S, a little interrupted, especially 

 on joint 5. The space between them is filled 

 in with purple-brown on joints 2 and 3, on 

 joints 6-9 and on joints 11 and 13, though 

 not completely on joints 8 and 9, but with a 

 trace of a dorsal line on the other joints. 

 Venter whitish. 



Fourth stage. Head higher than wide, 

 rounded, a little flattened in front; a minute 

 tubercle before the apex of each lobe ; pur- 

 plish black, finely mottled with yellow, green 

 at the sides posteriorly; antennae white, 

 ocelli black; width 2.2 mm. Cervical horns 

 thick, covered by piliferous tubercles with 

 about six rows of similar tubercles on each 

 side of the body, only the upper two distinct. 

 Color yellowish green. A triangular dorsal 

 patch on joints 2 and 3 covering the cervical 

 horns purplish black, mottled with little yel- 

 low spots ; a larger patch on joints 4-9 ellipti- 

 cal, retracted at the segmental incisures, reach- 

 ing the spiracle on joint 8, replaced centrally 

 irregularly by yellow and broadly connected 

 with a small patch on joints 10 and 11 which 

 widens on 11 and is narrowly connected with 

 the last patch on joint 13, replaced by green- 

 ish on the anal plate. Tails purple-brown, 

 twice annulated with yellow. 



Fifth stage. Head purplish black, green 

 at the sides posteriorly, reticulated where the 

 colors meet; mottled with yellowish in front 

 rather broadly but more narrowly to vertex. 

 Clypeus and mouth purplish, jaws black, an- 

 tennae white; width of head 3.2 mm. Cervi- 

 cal shield large, smooth, with angulations at 

 the corners, representing the "horns" of the 



previous stage. Body slightly elevated dor- 

 sally at joint 3 posteriorly, but without a pro- 

 cess on either joints 3 or 4. Tails spined, pur- 

 plish black, twice annulated with greenish 

 yellow. Body j-ellow-green speckled on the 

 sides with j-ellow and with small brown pili- 

 ferous spots. The dorsal patches are much as 

 before, the first triangular on joints 2 and 3 

 covering the top part of the smooth punctured 

 corners of the cervical shield, ending on joint 

 3 posteriorly, covered with little yellow spots 

 and narrowly bisected by a pale dorsal line. 

 The other patches are confluent; beginning 

 in a point on joint 4 the second patch widens, 

 contracted at each suture to below the spiracle 

 on joint 8 and over the subventral space, just 

 enclosing the spiracles on joints 7 and 9; it 

 narrows on joints S and 9 joining the third 

 patch on joints 10 or 11 (in different ex- 

 amples). The third widens a little on joint 

 11 and narrows on joints 11 and 12 where it 

 joins narrowly the last patch, which widens 

 on joints 12 and 13 and contracts a little at 

 the anal plate. The patch on joints 6-8 is 

 much mottled by large yellow (or partly 

 crimson) spots and on the anal plate by 

 whitish. Spiracles purple-black with a cen- 

 tral white line and black marks around them ; 

 the lateral yellow specks here segregate to 

 form an obscure stigmatal line. A row of 

 purple-black subventral blotches irregularly 

 represent the feet on the apodal segments. 

 Venter a little whitish with a narrow ventral 

 line posteriorly; feet green. Two erect 

 black spines at the anus. As the stage ad- 

 vances, yellow spots appear in the dorsal 

 patch on the 3rd~5th abdominal segments, 

 the sides are strongly sprinkled with little 

 brown spots and the dorsal band becomes 

 purplish edged with j'ellow but with no dis- 

 tinct crimson. 



Cocoon. Constructed on bark of gummy 

 silk and bits of bark and wood, like that of 

 the other species of Cerura. 



Food plants : — Poplar (Populus) 

 and willow (Salix). 

 Larvae from Dutchess Co., New York. 



