Genus Spilochalcis Thomson. 
Head triangular ; antennae separated at base by a triangular notched elevation y 
thorax usually marked with yellow ; metathorax rugose ; fore wings with long mar- 
ginal aud postmarginal veins ; abdomen, subglobose; petiole, moderately long, cylin- 
drical; posterior margin of the femora deusely serrate, except in missouriensis, which 
has four widely separated teeth; posterior tibiae produced into a spine, amd middle 
tibial with a distinct spine. 
2. (1) Spilochalcis niariae (Riley). 
This common parasite has been reared from the following insects: 
Anthercea polyphemas. — 24 $ , 23 9 specimens were bred from a 
cocoon of this species by V. T. Chambers, at Hew Orleans, La., in 
1869. The collection also contains specimens bred from the co- 
coons of this moth by Dr. Hoffmeister, at Fort Madison, Iowa. 
[C. Y. R. Coll.] 
Samia cecropia. — Specimens bred by Mrs. Treat, at Vineland, K. J» 
[C. Y. R. Coll.] 
Callosamia promethea. — Same as precediug. [C. Y. R. Coll.] 
Attacus cynthia. — From a lot of 202 cocoons received from S. 
Lowell Elliot, New York City, were bred, in May, 1881, 113 9 >s, 
36 $ 's. The former varied from 4 ram to 8 mm in length, and the 
latter from 3.5 mra to 6 mm . [Dept. Agr. Coll.] 
Specimens bred from this species were received from A. H. 
Mundt, Fairbury, 111. [C. Y. R. Coll.] 
Thyridopteryx ephemerccformis. — A specimen was bred from a bag 
of this insect, May 11, 1869, at Saint Louis. [C. Y. R. Coll.] 
3. (2) Spilochalcis missouriensis u. sp. 
Female. — Length, 5 mm . Posterior femora with four widely separated teeth. Color, 
bright scarlet, marked with black as follows : Flagellum of antennae, with the excep- 
tion of club at tip ; clypeus and occiput ; a large circular spot on the ruesouotum ; a 
transverse bandou the metanotum; an irregular spot on each side near tip of abdomen; 
a large spot on each side of the thorax just below tegulae ; a dorsal spot near the tip 
of the posterior coxae ; a minute circular spot on the dorsum of each hind femur, and 
two large round spots latero-ventrally, one iu the middle and one at tip ; spines of 
femur ; a spot at the base of the hind tibiae. The wings are slightly dusky, with a 
pronounced fuscous spot around club of stigmal vein ; stigmal club securiform, 
entire ; all wing veins brown. 
Described from 1 captured 9 ( $ unknown), Saint Louis, Mo., July. 
fC. Y. R. Coll.] 
Seems to come nearer to Smicra lamer i (Guer.), Cuba, than to any 
other described species. 
4. (3) Spilochalcis virens, n. sp. 
Male. — Length, 8 mm ; expanse, I6 mm ; greatest width of fore wing, 3.2 mm . Eesembles 
somewhat Sin. marice (Riley). Pedicel short and slender; hind femora, 12-15 toothed. 
Colors, black and yellow; facial grooves, vertex, and occiput black ; remainder of head 
yellow; scape of antennae yellow, black above near tip ; flagellum, black ; first three 
joints brownish below ; pronotum yellow, with a black spot anteriorly and one at 
each dorsal lateral angle ; mesoscutum black, with four narrow longitudinal stripes ; 
