RILEY NOTES ON NORTH AMERICAN MICROGASTERS- 307 



■emerges through a lid-covered opening which it cuts for itself at 

 one end of the cocoon, as is the habit of other species of the ge- 

 nus. Mr. Hubbard has bred from the cocoons of this species a 

 secondary parasite belonging to the Chalcids and Mr. Schwarz 

 has similarly bred a Hemiteles. 



Apanteles politus, n. sp. — Length i.S mm. c?$. Pitchv-black; 

 mandibles, palpi and basal joint of antennas testaceous ; flagellum beneath 

 on basal half piceo-testaceous ; legs honej-jellow, the coxae, and in the 

 postei-ior legs the tarsi, the apical half of the tibiae and the tips of the 

 femora piceo-testaceous; wings hyaline, nervures and stigma testaceous ; 

 first and second joints of abdomen beneath and their sides broadly above 

 testaceous. Antennae of female shorter than body, of male a little longer 

 than body. Mesothorax smooth and polished; metathorax depressed, 

 smooth and polished, its upper face limited by a carina on each side. 

 Abdomen smooth ; the central portion of basal joint very narrow, twice 

 as long as broad, narrowing behind to meet the triangular central area of 

 the second joint; the second joint with very broad membranose sides 

 separated by deep oblique grooves, this joint only half as long as the first 

 joint. Ovipositor cpncealed. Radial vein forming an angle of 120° with 

 the basal vein of the areolet. 



Described from many specimens bred, in Missouri, from Sco- 

 lecocanipa ligni Guen. The cocoons are spun in an irregular, 

 flattened mass beneath the bark, and are of a dirty-white color. 

 In the form and sculpture of the abdomen and in venation this 

 species agrees with militarise but it differs in the smooth thorax 

 and dark posterior coxce. 



Apanteles cassl\nus, n. sp. — Length 1.5 to 2.2 mm. c??- Black; 

 palpi white; mandibles sometimes testaceous; knees, the four anterior 

 tibiae, the basal half of posterior tibiae, and all the tarsi excepting at the 

 apex and on the apical half of the basal joint of posterior pair, whitish; 

 the anterior femora more or less piceous and the intermediate tibia often 

 tinged with testaceous. Wings hyaline, the veins white ; the stigma, 

 strongly in contrast, piceous; tegulae tipped with piceous. Antennae of 

 the $ scarcely shorter than those of the d*. Mesothorax opake, the punc- 

 tures shallow and obscure; metathorax opake, without distinct sculpture, 

 its upper face limited on each side by a carina exterior to the spiracles ; a 

 few slight ridges at the apex. Abdomen without punctures, lateral mar- 

 gins of the basal joint dark piceous, the central portion broad and with 

 sharply defined sides; second joint with abroad, triangular central area 

 marked off by two deep grooves which diverge from the middle of the 

 anterior margin; ovipositor concealed. The radius forms with the basal 

 vein of the areolet only a slight curve, but in one or two specimens there 

 is a slight angle on the outer side at their point of union. 



