3o8 TRANS. ST. LOUIS ACAD. SCIENCE. 



Described from twelve specimens bred, as mentioned above 

 (p. 302), from cocoons found, at East St. Louis, 111., upon Cassia 

 marylandica w^ith Terias nicippe. 



Apanteles thecl^, n. sp. — Length 2 mm. c??. Black; palpi white j 

 labrum. mandibles, and sometimes the antennae, piceous; tibiae and tarsi 

 testaceous, the apical half of posterior tibise and the posterior tarsi black- 

 ish. Wings hyaline; the tegulie, stigma, costa beyond stigma, and the 

 radius and veins at base of areolet, piceous. Antennae of the female much 

 shorter than the body, of the male nearly as long as the body. Mesotho- 

 rax closely punctured, opake ; metathorax not truncate, finely rugose-reticu- 

 late and with a slight median longitudinal ridge. Two basal joints of the 

 abdomen with numerous distinct punctures, remaining joints often sparsely 

 punctate; basal joint with the lateral margins narrow; ovipositor not ex- 

 serted. Stigma short, triangular, radius descending from its middle and 

 uniting at a considerable angle with the basal vein of the areolet. 



Bred Sept. 26, 1878, from larvae which emerged Sept. i8th from 

 a larva of a species of Thecla found feeding upon cotton plants 

 at Augusta, Ga. Also bred by Mr. E. A. Schwarz at Selma, 

 Ala., Sept. i6^ 1880, from cocoons spun Sept. 6th. Also bred 

 from a larva of the same Thecla received from Mr. B. F. Cooke^ 

 Marion, Ala., July, i88o. The cocoons are white and are spun 

 together in irregular masses, as many as twenty of the parasitic 

 larvae being sometimes found to infest a single caterpillar of the 

 Thecla. Ap. limenitidis closely resembles this species, but it is 

 larger, the basal joints of its abdomen are densely rugose, and its 

 cocoon is yellowish and solitary. The three specimens bred from 

 Gelechia gallcesolidagitiis which I mentioned as a variety in the 

 original description o{ li?/ie?uiidis prove upon further examination 

 to be males and to belong to a distinct species, the basal joints 

 of the abdomen being quite smooth. 



Apanteles limenitidis, ybrw flaviconch^. — Under the above name 

 may be recorded a species or variety which is found in Connecticut as well 

 as in Missouri, and which presents all the characters of the species bred 

 from the yoimg larvae of Limetiitts disippus. but which spins its cocoons 

 in masses like those of iJ/. militarise with which it is associated in fields 

 infested with the Army-worm. The cocoons also are of a bright lemon- 

 yellow, those of the true limenitidis being dull yellow. From congregatus 

 the imago oi Jlaviconchce diflers in the femora being black except at the 

 tip, the tibiae and tarsi being dull yellow. The radius forms an angle with 

 the basal vein of the areolet at their point of union : the base of the third 

 abdominal joint is punctate. 



As it is probable ihdit Jlavi cone /ice is a parasite of the Army- 



