246 MANDIBULATA. H YMEXOPTERA. 



the apex reddish beneath, and the tip of the femora sometimes yellowish ; 

 wings hyaline ; cellule somewhat irregular and petiolated. 

 Rare : taken at Darenth wood in July. 



Sp. 41. tricolor. Niger, abdomine rufo, marginibus segmentorumjiavis, seg- 

 mento 1-mo toto nigro, pedibus facie et pectore Jlavis. (Long. corp. 4 lin. ; 

 Exp. Alar. 7 lin.) 



Tr. tricolor. Gravenhorst, ii. 207. — Steph. Nomen. 2d edit. Gen. 715. 41. 



Black : head testaceous-yellow, with the forehead and crown black ; anteima? 

 with the basal joint black, yellow beneath, the 3 following black, remainder 

 reddish-yellow, somewhat of a rusty-brown above; thorax with the neck, 

 breast, a spot beneath the wings, one below the scutellum, and the scu- 

 tellum, yellow ; abdomen with the basal joints black, remainder tawny-red, 

 with the margins yellowish ; legs moderate, 4 anterior yellow, with the 

 femora tawny-red above ; posterior with the coxae yellow, black above, tro^- 

 chanters yellow, femora testaceous-red, with the extreme base black ; tibiae 

 dull testaceous, with the base black ; tarsi fuscous ; wings somewhat 

 hyaline ; cellule 3-angular, irregular and petiolated. 

 Rare : taken at Darenth wood and in the New Forest, in June. 



Sp. 42. segmentarius. Niger, abdominis medio rufo, pedibus anterioribus rujis, 

 coxis et trochanteribus nigro flavoque maculatis, tibiis posticis basi ochreo 

 albidis, facie et antennarum basi subtus flavis. (Long. corp. 4 lin. ; Exp. 

 Alar. 7 lin.) 



Ich. segmentarius. Fabi-icius, Manf. 262. — Steph. Nomen. 2d edit. Gen. 715.42. 



Black : mouth and face yellow, the latter in the female with a short vertical 

 black streak ; mandibles black at the tip ; antennae red, dusky above, 2 

 basal joints yellow beneath; scutellum at the tip, or in the female entirely 

 yellow ; abdomen with the basal segment black, red at the apex in the 

 female, 2nd to 4th red, remainder black, but in the female the 5th is some- 

 times totally red, or red with a black basal patch, and the 6th is occasionally 

 red, with the disc dusky ; legs moderate, 4 anterior in the male tawny, with 

 the coxse and trochanters yellow, the former with a lateral black dot ; of the 

 female red, the coxae black, with the tip yellow ; the trochanters yellow, 

 with usually a black dot above, posterior black, trochanters yellow or rusty 

 at the apex, the tibiae more or less whitish towards the base ; wings stained 

 hyaline; cellule irregular, the outer nervure sometimes nearly obliterated. 

 Taken, but rarely, near London, in June. 



Sp. '43. luteifrons. Niger, abdominis medio rufo, pedibus fulvis, tibiis pallia 

 dioribus, posticis apice nigro, facie testaced. (Long. corp. 3 lin. ; Exp. Alar. 

 5i lin.) 



Tr. luteifrons. Gravenhorst, ii. 215. — Steph. Nomen. 2d edit. Gen. 715. 43. 



Black : face and mouth rusty-yellow, tips of the mandibles black ; antennae 

 shortish, the apex curved, fuscous, rusty beneath, the basal joint dull 

 whitish ; scutellum whitish ; abdomen as broad as the thorax, ovate, some- 



