1 40 MANDIBUL At A. MYMENOPTERA. 



below the wingSj a dot before them, and a transverse streak below the 

 scutellum white, or testaceous ; scutellum white ; abdomen rather slender, 

 2nd and 3rd segments slightly opaque, the rest more glossy, and the margin 

 of the 2nd in the females usually chestnut ; legs bright or saffron-red ; the 

 coxse and trochanters black ; tibise frequently whitish-yellow, with the tip 

 straw-colour, posterior generally black at the tip ; the hinder tarsi black, 

 with the basal joint rusty ; antennae porrect in the male, incurved at the tip 

 in the female, with the 8th to 11th joints more or less white above, brown 

 or rusty beneath, the 4-th to 8th generally ferruginous below ; wings with 

 the stigma brown-black, or pitchy, costa brown or red, scales black or 

 brown, sometimes yellowish. 



Also common near London, during the summer, frequenting um- 

 belliferous flowers, &c. by wood-sides and hedges. 



Sp. 37. crassicornis. Niger, femoribus tibiisque rvfis, scutello lineuque trans~ 

 versali metathorace albis, antennis brevioribus, crassioribus. (Long. corp. 

 7 lin.; Exp. Alar, llj lin.) 



Ic. crassicornis. Sieph, Nomen. '2d edit. Appendix. 



Black: mandibles reddish at the apex; thorax with a white dot before the 

 wings ; scutellum white, with a transverse streak of the same hue behind, 

 on the metathorax ; abdomen oblong-ovate, slightly silky, and glossy at the 

 apex ; legs pale red, coxae and trochanters black ; the extreme tip of the 

 hinder tibiae dusky, and the posterior tarsi black; antennae short, rather 

 thick, attenuated at the apex, and porrect ; wings smoky-hyaline, the costa 

 and stigma fuscous ; scales black, with a white dot. 

 Taken near London, in June, I believe at Hertford. 



Sp. 38. trucidator. Niger, abdomine cceruleo-nigro, femoribus tibiisque rvfis, 

 posticis fusco maculatis. (Long. corp. 5§ lin.; Exp. Alar. 11 lin.) 



Ic. trucidator. G7-avenhorst, i. 172. — Steph. Nomen. 2d edit. col. 132. — Ic. se- 

 piatorius. Marsham MS.— Steph. Catal. 347. No. 4358. 



Black: antennae rather short; scutellum with a white dot at the apex; 

 abdomen glossy blue-black, with the basal segment a little dilated towards 

 the apex ; legs slender, red ; coxse and trochanters black ; posteiior femora, 

 with the base, apex, and inner side fuscous ; tibiae fuscous, with the base 

 and inner margins reddish; tarsi black; wings with the stigma, costa, and 

 scales fuscous ; cellule somewhat triangular. 

 Seemingly very rare : found in July near London. 



Sp. 39. albosignatus } Niger, orbiiis oculorum internis albis, femoribus tibiisque 

 riifis, posticorum apice nigra. (Long. corp. 5 lin.; Exp. Alar. 8^ lin.) 



Ic. albosignatus. Gravenliorst, i. 167 ? — Steph. Nomen. 2d edit. col. 132. 



Slender, black : palpi fuscescent ; inner orbits of the eyes towards the antennte 

 whitish ; thorax with a minute white dot before the wings ; scutellum 

 white ; abdomen with the margin of the basal segment faintly chestnut ; legs 

 pale red, with the cosec and trochanters black, the intermediate and posterior 



