132 MANDIBULATA. HYMENOPTERA. 



Black: mandibles with a reddish spot; thorax with a reddish dot before the 

 wings; metathorax unarmed; abdomen slender in the male, very glossy, 

 and smooth, impunctate ; opa:iue and punctured on the basal segments in 

 the female, glossy and slightly compressed at the apex, the 2nd and 3rd 

 segments sometimes faintly edged with chestnut ; legs bright red, with the 

 coxse and trochanters black ; hinder tibiae at the tip, and their tarsi and the 

 extreme apex of the 4 anterior tarsi black; antennae with the basal joint 

 black, 16 or 18 following bright red, remainder black; in the female the 

 basal joint is black, the 6 or 7 following red, then 5 or 6 white, and the 

 remainder black ; wings hyaline, with the costa and stigma reddish-brown; 

 scales black. 



The intermediate basal joints of the antennae are sometimes brownish-red. 

 Not very uncommon within the metropolitan district, occurring in 



July at Coombe wood and Hertford, and in Salop. 



Sp. 14. bilineatus. Niger, abdomine nigro-ccerulescente, femoribus tihiisque 

 riifis ; foemina antennis albo-annulatis. (Long. corp. 4 — 62 lin.; Exp. Alar. 

 7—9 lin.) 



Ic. bilineatus. Gravenhorst. — Steph. Catal. 346. No. 4329. 



Black : inner orbits of the eyes more or less distinctly white, and in the females 

 the outer ones slightly so; antennae with the 9th to 15th joints more or less 

 white above and on the sides ; thorax with a white dot under the wings, 

 sometimes obsolete ; abdomen bluish-black, finely punctured, with the 2nd 

 and 3rd segments roughly aciculated ; legs red, coxae and trochanters black, 

 tarsi of the posterior and apex of the tibiae dusky or black; wings smoky- 

 hyaline, with the stigma, costa, and scales fuscous or black. 



Male with the centre of the mandibles red; the scutellum with 2 pale obscure 

 white dots on the scutellum ; the antennae porrect and black. 

 Not very common : found near London and in Shropshire, in 



June. 



Sp. 15. iEthiops. Niger, femoribus rufis, antennarum annulo albo. (Long, 

 corp. 4.| lin.; Exp. Alar. 7 lin.) 



Ic. iEthiops. Gravenhorst, i. 130. — Steph. Nomen. 2d edit. col. 131. 



Black : antennae shorter than the body, porrect, curved at the apex, the 12th 

 to 17th joints white on the sides and above; abdomen rather longer than 

 the head and thorax united, and a little narrower, with the 2nd to 5th 

 segments of equal width; legs red, cox£e and trochanters with the hinder 

 tarsi, and frequently the tibiae at the apex and the extreme tips of the femora 

 fuscous; wings hyaline, with the scales, costa, and stigma fuscous or black, 

 or the last sometimes ferruginous ; cellule 5-angular, or somewhat tri- 

 angular. 

 Rare : taken near London, and in Norfolk, in June. 



Sp, 16, opticus. Niger, orhitis nculorum, articnlo l-mo anteiwai^vm, punciis nd 



