176 MANDIBULATA. HYMEXOPTERA. 



Female said by Gravenhorst to differ in having the metathorax scarcely armed, 

 the inner orbitS;, and 4 termhial segments of the abdomen on the margins 

 yellow, and the antennse annulated with white: I think, however, the fol- 

 lowing insect to be the true female. 



Males extremely abundant on flowers throughout the metropolitan 

 district, especially near Darenth wood, amongst potatoes ; also found 

 in various parts of England, towards the end of June. 



Sp. 132. quadrimaculatus. Niger, metatliorace bispino, orbitis oculorum internis, 

 puncto ad alarum radicem, segmentis 2 et 3 basi, sequentibus margine Jlavis, 

 pedibus fulvis, coxis et femorum apicibus nigris. (Long. corp. 5| — Tjlin.; 

 Exp. Alar. 10— 12§lin.) 



Ic. quadrimaculatus. Schranck. — Steph. Catal. 348. No. 4402. 



Black : inner orbits yellow ; antennas slender, involuted at the apex, rusty- 

 red, fuscous towards the tip, the basal joint generally rusty beneath; 

 thorax with the anterior margin of the collar, a dot before, and streaks 

 beneath, the wings yellow ; metathorax M'ith 2 sharp spines ; scutellum 

 yellow; abdomen with a yellow border on the base of the 2nd and 3rd seg- 

 ments, dilated on the sides, the remainder with the margins yellow, or 

 greenish; legs yellow; coxse black; 4 anterior femora black in the middle, 

 hinder pair black, with the base yellow ; apex of the tibise, especially the 

 posterior, and the tarsi tawny-yellow ; wings yellowish-hyaline. 



Is not this the female of the preceding insect ? 



Not uncommon within the metropolitan district in June ; also 



taken in Norfolk and Salop. 



Sp. 133. trifasciatus. Niger, facie et segmentorum 2-4 basi Jlavis, thorace pedi- 

 husque Jlavo maculatis, abdominis apice J'ulvo : fcemina ? orbitis oculorum 

 internis ^avis, annulo antennaruvi albo. (Long. corp. 7 — 8 lin. ; Exp. Alar. 

 14—15 lin.) 



Ic. trifasciatus. Gravejihorst, i. 380. — Steph. Nomen. 2d edit. col. 134. 



Black : face and orbits yellow ; antennse with the basal joint the same 

 beneath; thorax with the margins of the collar, a streak beneath the wings, 

 a spot on the sides of the prothorax, and sometimes one on the disc and 

 another beneath the scutellum, and the latter yellow ; scutellum with 2 

 acute tubercles; abdomen with the base of the 2nd, 3rd, and 4th segments 

 broadly yellow, the margins of the 5th and 6th, and the 7th almost entirely 

 pale fulvous ; legs with the coxee yellow, black at the base, trochanters 

 yellow, posterior black at the base ; 4 anterior femora yellow, above black, 

 posterior black, with the base red; tibise yellow, posterior black at the apex, 

 tarsi fulvescent ; wings yellowish-hyaline. 



Female with the inner orbits yellow ; the antennae incurved, with the 10th to 

 15th joints white above. 

 Rare : taken at Darenth wood in June. 



