208 



those bred from Columbia have been labelled by Mr. Cresson " Ilem- 

 iteles compadus Cresson." I do not find this species published ; the 

 Pezomachus compadus Cresson is a different species. I see among 

 Mr. Smith's t3'pe3 the Cr. Smithii also labelled by Mr. Cresson as 

 Hemiteles; of course the name //. Smithii is to be retained. All 

 specimens agree with Dr. Packard's description, except that most of 

 the males have only the apical third of the tibiae of the hind legs 

 blackish, and only one two-thirds as stated in the description ; I find 

 some of H. S/nilJiii in the infected cocoons. They are situated be- 

 tween the cocoons of Cr. Samiae, but in an oblique position at vari- 

 ance with the regularity of the cocoons of Cr. Samiae. The cocoons 

 are similar to those of Cr. Samiae, but shorter, nine mill, long, 

 and apparently woven with a softer silk. The dried nympha, or the 

 dead imago, is enclosed in an elongated somewhat fl^ask-shaped bag, 

 made of white and very soft silk, always open at the smaller end. 

 I never found such bags in the cocoons of Cr. Samiae or Cr. nun- 

 cius. I found in the cocoons always H. Smithii, only in small num- 

 bers compared with the other species. 



Between these cocoons I took out of a similar but smaller one, a 

 broken specimen of a third species. It is a female Hemiteles, per- 

 haps H. sessilis (Naturalist Canad. VI, p. 334), or nearly related. 

 In some characters it is similar to Rem. conspicuus Cresson, but as 

 the specimen consists only of fragments, I cannot go farther in 

 my determination. The dark transversal bands on the fore wings, 

 and smaller size, separate it directly from the above mentioned 

 species. 



I should remark that I possess larvae of Cr. Samiae, Cr. 7iun- 

 cius and H. Smithii. Some of the two first contain, as I believe, 

 eggs of a parasite ; perhaps Hemiteles preys upon them. 



Chalcis Mariae, found on Polyphemus and Cecropia, is the only 

 known parasite on the Attaci with which I am unacquainted, while 

 I have myself observed a small species of Bracon, parasitic on Pro- 

 metUea, and possess specimens of it in the larval as well as in the 

 perfect state. 



