238 MAXDIBULATA. HYMENOPTERA. 



Tr. impressus. G7'avenhorst, ii. 161. — Steph. Nnmen. ^d edit. Gen. 115.^0. 



Black: mouth reddish; antennae porrect, the basal joint black, remainder 

 fuscous, rusty beileath ; thorax with aline before the wings, a dot below 

 them, and a transverse streak beneath the scutellum yellow-white; meta- 

 thorax rough ; scutellum with the apex and sides whitish ; abdomen 

 thickly punctured, towards the apex of the segments smooth, the basal 

 segment with 2 elevated longitudinal lines, and a transverse groove, the 

 margins whitish, 2nd and 3rd each with an obscure transverse channel, their 

 margins testaceous- white; ovipositor a little exserted, fuscous; legs 

 fulvous ; posterior with the tibise white, the base and apex black-brown ; 

 tarsi black; wings hyaline, iridescent; cellule minute, 3-angular, somewhat 

 petiolated. 

 Rare: found near London in June. 



Sp. 21. lucidulus. Niger, segmentorum marginibus alhentibus, pedihus fulvis, 

 tarsis posticis fuscis, facie genisque Jlavis. (^Long. corp. 2| — 3 lin. ; Exp. 

 Alar. 4— 5i lin.) 



Tr. lucidulus. Gravenhorst, ii. 162.— Steph. Nomen. 2d edit. Gen. 715. 21. 



Black : head somewhat glabrous, swollen, with the face, cheeks, and mouth 

 yellow, the former occasionally with a short black streak ; antennae half the 

 length of the body, black, somewhat ferruginous beneath towards the tip; 

 thorax with the lower part of the collar, and sometimes the lateral edge and 

 a streak beneath the scutellum, and also the apex of the latter, yellow ; 

 abdomen oblong, the 1st segment a little dilated towards the tip, and 

 channelled, entirely black, the remainder with the lateral margins and the 

 extreme edge whitish, the 2nd and 3rd sometimes a little chestnut before the 

 margin, beneath ochreous ; ovipositor concealed ; legs slender, fulvous, 

 coxae and 2 or 4 anterior trochanters more or less pale yellow, posterior 

 tarsi and apex of the tibise brownish ; wings hyaline ; cellule irregular, 

 more or less petiolated. 

 Found in August near London ; I took several specimens at the 



Hermitage last year at that period. 



Sp. 22. sexcinctus. Niger, segmentorum niarginibus albidis, maculis 2-bus 

 faciei Jlavis, pedibus rufis, posticorum tibiis tarsisque fuscis. (Long. corp. 

 3 lin. ; Exp. Alar. 5^ lin.) 



Tr. sexcinctus. Gravenhorst, ii. 164. — Steph. Nomen. 2d edit. Gen. 715.22. 



Black : head subglobose ; mouth, clypeus, and 2 dots on the face yellow ; 

 mandibles with the tip black, the apex of the clypeus sometimes rusty ; 

 antennae shorter than the body, fuscous, occasionally rusty beneath, the 

 basal joint black ; thorax with a streak below the scutellum, and the latter 

 more or less yellow; abdomen shining, silky, rather narrower than the 

 thorax, linear-oblong, the basal segment more or less deeply channelled, 

 entirely black, the remainder with the lateral and apical margins whitish, 

 the 7th sometimes with a tawny edge, beneath yellow ; legs slender, red or 



