60 MANiJIBULATA. HYMEXOPTERA. 



Te. arcuatus. Forster.—AW. arcuatus. Sieph. Catal. 333. No. 3872. 

 Black : antennae black, generally yellow beneath ; mouth and clypeus yellow- 

 , ish; sides of the collar and some spots on the sides of the thorax luteous ; 

 abdomen with the 1st, 4th to Gth, and the 8th segments above more or less 

 broadly edged with greenish-yellow, the others spotted with the same on 

 the sides, beneath yellow on the sides, and the ventral segments bordered 

 with the same ; legs bright yellow, with the trochanters, femora above, and 

 tips of the tibiae and tarsi black ; wings hyaline, with fuscescent nervures. 

 The male has the abdomen beneath entirely yellow, and the segments above 

 more broadly edged with the same ; the posterior tibiae and tarsi are black 

 above. 

 An extremely variable insect : sometimes all the femora, or only the 2 anterior, 

 2 intermediate, or 4 anterior ones, are entirely yellow ; at others the scu- 

 tellum is yellow ; the trochanters are occasionally without the black spot, 

 and at times only 1 or 2 pair are spotless, &c. 



Extremely abundant throughout the metropolitan district, on um- 

 belliferous flowers, during the end of June and beginning of July. 



c. Antenna entirely black. 



Sp. 8. tenulus. Ater, ahdomine fasciis duabus mediis, pedumque tihiis tarsisque 

 Jlavis. (Long. corp. Sj — 5|lin.; Exp. Alar. 11 — 12 lin.) 



Te. tenula. Scopoli All. tenulus. Steph. Catal. 333. No. 3873. 



Antenna and head black ; mandibles brown at the apex ; thorax with a yellow 

 streak on each side ; abdomen black, with the 3rd and 4th segments edged 

 with yellow above and on the sides ; femora black, the anterior with a 

 yellow streak at the tip above ; tibiae and tarsi yellow, with the apex 

 black ; wings yellowish, with the tip brownish ; stigma yellowish-testa- 

 ceous. 



The male has the yellow margin of the 4th segment of the abdomen inter- 

 rupted. 



' Apparently very rare : taken near London in July. 



Sp. 9. rusticus. Niger , pedibus anterioribusflavis,posticisJiavo variis (^in mare 

 ante apicem alhis) ; abdomine (foemina) fasciis 3-bus Jlavis, posticis 2-bus 

 interrvptis (maris immaculato) . (Long. corp. 5| — 5i lin. ; Exp. Alar. 

 IQi— llilin.) 



Te. rusticus. Linne.—kW. rusticus. Steph. Catal. 333. No. 3874. 



Black : mouth and clypeus luteous ; thorax with its sides and the scale of the 

 wings yellow ; abdomen with the basal segment edged with yellow, the 5th 

 and 6th with a large spot on both sides of each, forming an interrupted 

 double yellow fascia, and the terminal joint also yellow above; anterior legs 

 entirely pale yellow ; posterior with the femora yellow at the base and black 

 at the apex ; tibiae black, with a yellow spot on the outer edge towards the 

 apex ; tarsi black, and of the 4 anterior legs fuscous above ; wings fus- 

 cescent. 



