270 



of which there are four on each segment, two and two, and the lateral rows, 

 each of much larger, transverse, quadrate spots, one to each segmeat on each 

 side. Anal clappet with four spots, thus: 



Nematus ventralis Say. 



June 22(1. Found the larva on the willow. Head deep black, polished; 

 body blue-black, with lateral series of ten large, fulvous spots. True legs 

 si.\, prolegs six intermediate pairs, and one terminal pair, or twenty in all. 

 Last segment with two very short, terminal styles. Raises the tail when 

 disturbed. 



Cocoons formed June 24. Tlie perfect insect began to come out July 

 15th, and afterwai'ds; and at the same time an Ichneumon (/. meUipectorius 

 Say Mss.). 



Found a swarm of larvaa on weeping willow Oct. 17, 1846. 



Found on narrow leaved dwarf willow, near Fresh Pond, Sept. 5, 1841; 

 also found on same shrub a pair of the winged insects apparently recently 

 transformed. Larva six tenths of an inch long, greenii^h black, and with 

 ten heart shaped, ochre yellow spots on each side, beginning on the second 

 ring. Prolegs fourteen, viz., twelve ventral, and two very short, retractile 

 ones to the last ring, all of a whitish color; the first pair on the fifth ring, 

 and the rest (except the anal pair) on the following rings. Body trans- 

 vei"sely wrinkled, but smooth. Head polished, jet black; anal segment (just 

 above the flap) with two minute, black warts, or truncated, slender tubercles. 

 Curls its tail when at rest. They died without change. 



Found another on willow, Sept. 19. It made a cocoon in a leaf, Sept. 20. 



Papilio Asterias Cramer. 



Caterpillars on (he parsley and coniura. 



Larva green, banded with black, the bands spotted with yellow, found on 

 Cicuta. When touched, the larva projects a pair of soft orange colored an- 

 tenna? from the front part of the body, which at other times are drawn in 

 and concealed. These organs emit a strong, disagreeable smell. The larva 

 eats voraciously a few days before it suspends itself, and then discharges a 

 great quantity of watery ftecal matter, shrinks in size, and wandei-s up the 

 side of the box in which it is kept, fixes its tail and fastens a band across its 

 body. The young larvie of the second brood were found Sept. 16, 1839, 

 feeding on Conium maculatum. Length one half inch, another one fourth 

 inch. 



Head black, spotted with Avhite (a white spot on front, tAvo spots on ver- 

 tex, and one on each side). Body black, with a Ijroad, white, transverse 

 band on the sixth and seventh segments; six black tubercles on each seg- 

 ment encircled with orange, the lower ones forming a series of larger orange 



