78 MANDIBULATA. HYMENOPTERA. 



Sp. 15. tristis. JVigra, ore, coUaris margine, orbiiu, scutello ct punct'is scutella- 

 ribus margineque segmento \-mo abdominis flavis, ahdoviine segmentis 3 — 5 

 utrinque macula tesiacea. (Long. corp. 5 — 5§ liii. ; Exp. Alar. 9 — 91 lin.) 



Te. tristis. Mus. Marsham.—Steph. Catal. 337. No. 3917. 



Black : antennae with a fuscous line beneath ; mouth pale yellow ; orbits and 

 margin of the collar also the same ; scutellum, 4 spots behind it placed 

 tetragonally, and the margin of the 1st segment of the abdomen, bright 

 yellow, the 3rd to the 7th segments with a more or less enlarged triangular 

 testaceous spot on each side, most conspicuous on the 4th and 5th segments, 

 beneath entirely pitchy ; legs testaceous, the base of the intermediate 

 femora, and the hinder ones entirely black ; hinder tarsi fuscous ; wings 

 hyaline, with the nervures fuscous, and the stigma paler, with its base 

 whitish. 

 Seemingly very scarce : I obtained a pair from the Marshamian 



collection, and others subsequently captured in the vicinity of 



London, in June : found also in Scotland. 



Sp. 16. labiata. Nigra, ore anlice scutelloque albis, abdominis segmentis 3-tio 

 ad 7-ma testaceis, immaculatis. (Long. corp. 5| lin. ; Exp. Alar. 9 lin.) 



Te, labiata. St. Fargeau Mon. 78. — Te. apicalis. Steph. Nomen.2d edit. col. 128. 



Black : mouth white in front ; clypeus black, sometimes with luteous spots 

 towards the base; scutellum whitish; abdomen with the 3rd to the 7th 

 segments bright, unspotted, testaceous ; legs testaceous, the intermediate 

 femora beneath and the hinder entirely black ; posterior tibise and tarsi 

 fuscous ; wings hyaline, with fuscous nervures and stigma, the base of the 

 last pale. 

 Scarce : 1 procured a pair from Mr. Bainbridge's collection, that 



occurred in the vicinity of London. 



Sp. 17. caliginosa. Aira nitida, ore, scutello et maculis subscutellaribus Jlavis, 

 pedibus anticis tibiisque Intermediis obscure testaceis. (Long. corp. 5^ — 6 lin.; 

 Exp. Alar. 8§— 11 lin.) 



Te. caliginosa. Steph. Catal. 337. No. 3918. 



Deep shining black : antennae pitchy beneath ; mouth, labrum, and clypeus 

 bright yellow; scutellum and 4 dots beneath also yellow; anterior legs 

 (except the extreme base of the femora) and intermediate tibife dull testa- 

 ceous, the former palest in front, the rest of the legs black, with the hinder 

 tibiae somewhat pitchy ; wings hyaline, with the nervures and stigma pale 

 fuscous, the base of the latter white. 

 Not very uncommon within the metropolitan district in June. 



Sp. 18. microcephala. Nigra, nitida, clypeo labro mandibulisque albidis, palpis 

 pedibusque testaceis, orbitis internis ienue albis. (Long. corp. 5 — 6 lin, ; Exp. 

 Alar. 10—11 lin.) 



