333 



from the side (PI. LXXXI, Fig. i6), near the bases of which is a single 

 long hair on each side; on each side near base of the upper pair of 

 large thorns is a single long hair and another above base of each thorn. 

 Thorax and wing sheaths without tubercles; the pair of hairs above 

 wing base present, the discal hair indistinguishable. Abdomen with 

 spiracles very small ; first segment with about 6 short, stout brown 

 thorns on median sixth slightly beyond base, and on each side of these 

 but slightly more cephalad a closely placed series of about 20 long, 

 slender curled hairs, reaching about two thirds of the distance from 

 median line to spiracle ; posterior to the spiracle are about 6 long hairs ; 

 segments 2 to 7 with a transverse median comblike series of stout 

 brown thorns, interspersed with long slender hairs at about every 

 fourth or fifth one (PI. LXXXI, Figs. 3 and 8) ; eighth segment with 

 a pair of closely placed thorns on each side of the median line, between 

 each pair of which is a single slender hair (Fig. 19) ; apex of abdo- 

 men with 3 thorns on each side (Fig. 19) ; post-spiracular hairs 8-9 

 in number; each ventral segment with 6-8 hairs on each side of 

 median line in a transverse series. 



The pupal exuvium from which this description was drawn is that 

 of a specimen that was reared from a larva parasitic in a pupa of a 

 noctuid moth which was obtained at the Devil's Hole near Havana, 

 111., June 8, 1905, the parasite emerging July i, 1905. 



Imagines in the laboratory collection are from the following Illi- 

 nois localities : Algonquin, Savanna, Milo, Urbana, Champaign, Long 

 Lake, and Kappa. There is also a specimen in the collection from 

 Jamesburg, N. J., and one from San Bernardino, Cal. The dates of 

 occurrence range from June 10 to August 11. 



No other specimens in the collection bear any records of life 

 history. 



Anthrax altcrnata Say has been reared from an undetermined noc- 

 tuid larva* by Gillette, and recorded by Riley and Howard. In the 

 same paper Anthrax hypomelas Macquart is recorded as having been 

 reared from a pupa of Agrotis herilis by Webster, and A. molitor 

 Loew from a pupa of a noctuid resembling Tcuniocanipa rufiila. Zet- 

 terstedt, in 1842, stated that the group to which lateralis belongs, de- 

 posits eggs upon lepidopterous larvae. Glover, in the Agricultural Re- 

 port for 1866, mentions that "an Anthrax has been bred from the 

 chrysalis of a moth."t 



*Insect Life, Vol. 2, 1890, p. 353. 

 tLoc cit., p. 354. 



