Catalogue of British IchneumonidcB. 431 



the eyes; antennae about two-thirds the length of the body, 28 

 joints ; three first joints of the flagellum of equal length, about 

 one-half longer than wide, joints not distinctly separated. Meta- 

 thorax with a distinct longitudinal keel on the superior surface. 

 First segment of abdomen slightly curved, almost straight, post- 

 petiole gradually sloping from the petiole and but little wider ; 

 remainder subcompressed ; 2nd segment longer than wide ; aculeus 

 nearly one-half the length of the abdomen. 



Black ; legs red, coxae black, trochanters brownish. Abdomen 

 red ; 1st segment black ; back of remainder scarcely fuscous- 

 stained. Stigma and squamulee piceous. Female. Length, 

 4 mm. 



A single female, taken at Norwich, July, 1880. Some- 

 what like jocator, but metathorax with a central keel. 



Thersilochus minutus, m. 



Niger ; tibiis rufis, aculeo abdominis longitudine. 



Head and thorax subopaque ; head wider than thorax, rather 

 stout, sides scarcely slanting behind the eyes ; antennae of female 

 about as long as the head and thorax with 12 joints, the male a 

 little longer with 16 joints ; first three joints of flagellum of female 

 of about equal length, quite twice as long as wide ; 1st joint in the 

 male the same length ; the remainder submoniliform. Supero- 

 medial area of metathorax longer than wide, narrower behind than 

 in front. Abdomen compressed, shining; 1st segment curved 

 towards the apex, post-petiole one-half wider than the petiole ; 

 aculeus as long as the abdomen. 



Black ; front and middle femora reddish, black at the base ; 

 extreme apex of hind femora red ; tibiae reddish, shghtly fuscous 

 towards the apex ; front tarsi red. Male and female. Length, 

 2"5 mm. 



Taken by Dr. Capron at Shiere. 



Thersilochus Jiavicornis, Thom. 



Thorn., Opus. Ent., 1391. 



I bred one male from the galls of Nematus gallicola, 

 and took another in the same neighbourhood (near 

 Norwich) the galls came from. 



