Some Illinois Microgasters. 3 



slightly constricted at middle, the terminal joint appearing 

 flattened when seen from above, and enlarged at the middle and 

 tapering to a point when seen from the side. Mesonotum 

 confluently punctured. Metauotum coarsely reticulated, the 

 posterior margin of the metascutum being raised, and the 

 metascutellum having a prominent longitudinal median carina. 

 Abdomen shorter than thorax; basal segment vertical, the ter- 

 gura finely reticulated, with a median groove extending from 

 anterior margin two thirds of its length, and a slight tubercle 

 on middle of posterior margin; tergum of second and following 

 segments smooth and shining, with sparse pubescence. Radial 

 vein arising from middle of stigma, nearly forming a right 

 angle with basal nervure of the quadrate areolet; a white spot 

 on cubital vein at base of areolet, and another on the vein clos- 

 ing the areolet exteriorly, just before its juncture with the 

 cubital vein. Side of stigma bordering first cubital cell very 

 slightly swollen; that bordering radial cell straight. Apical 

 nervures slender, but easily seen. 



Described from two females bred from Mamestra picta, 

 Harr. 



This species is very distinct from M. ceratomice^ Riley, and 

 is easily distinguished from M. gortijnce, Riley, by its larger size, 

 quadrate areolet, red posterior coxse, etc. 



Apanteles congregatus. Say. 



A long series of this abundant and variable species is to be 

 found in the Laboratory collections. Adult specimens have 

 been taken with the sweep-net at Normal, McLean County, July 

 1, 1882, and June 27, 1883; at Anna, Union County, September 

 13, 1883; and at Urbana, Champaign County, June 15, 1885. 

 Some were also collected in woods near Pekin, Tazewell County, 

 August 14, 1883, and still others were found among some col- 

 lections made by beating the foliage of Ampelopsis quinquefo- 

 lia at Urbana, May 23, 1885. 



Large numbers of specimens of this Apanteles have also 

 been bred at various times from the larvae of our two common 

 species of tomato-worms, — Phlegethontius Carolina, and P. 

 celeus. Cocoons obtained from the former species were 

 received from Swanwick, 111., Sept. 1, 1884, and within five days 



