102 MANDIBULATA . HYMENOFTERA. 



luteous ; abdomen yellow, with the 2 basal segments more or less black oa 

 the back, the remainder fuscous at the base ; legs luteous, the 4 anterior 

 femora spotted with black ; wings fuscescent, especially at the apex, with 

 the nervures black. 

 Taken at Darenth wood, in July, but very rare. 



Sp. 18. Betulas. Plate xxxv. jf. 3. — Lutea, thorace anoque nigris,aUsfusciSj 

 disco hyalino,fiavo venoso. (Long. corp. 6| lin. ; Exp. Alar. 12^ lin.) 



Te. Betulae. LinnL — Ly. Betulae. Steph. Catal. 34=0. No.S9%Q. 



Antennte and head bright pale testaceous, with a subquadrate spot on the 

 crown and the mandibles at the tip black ; thorax with the collar bright 

 testaceous, the disc, sternum, metathorax, and scutellum deep black ; 

 abdomen pale testaceous, with the 1st and apical segments, and a trans- 

 verse line on the 8th, black ; legs pale testaceous ; wings hyaline on the 

 disc, with the nervures yellowish, and a distinct curved transverse fuscous 

 fascia towards the apex, the stigma luteous. 

 This splendid insect is found at Birch wood in July, but appears 



to be very rare : it has also been taken in Devonshire. 



Sp. 19. lutescens. Nigra, thoracis dorso maculis tribus testaceis, abdominejlavo, 

 pallide marginato, segmentisque 2-bus basalibus atris. (Long. corp. 5 lin. ; 

 Exp. Alar. 11 lin.) 



Ly. lutescens. St. Fargeau. — Steph. Catal. 340. No. 3977. 



AntennjE black, testaceous beneath ; head black, with a spot between the 

 antennae, the mandibles and the palpi luteous ; thorax black, with a testa- 

 ceous spot on each side of the disc, and 1 on the scutellum ; abdomen 

 luteous, with the sides paler, and the 2 basal segments black ; legs pale 

 luteous I wings somewhat fuscous, with a transverse cloud towards the 

 apex. 

 Found, but very rarely, in the vicinity of the metropolis. 



Sp. 20. fasciata. Nigra, macula frontali, abdominis apice, pedibusque Jlavis, nlis 

 infuscatis fascia transversali pone medium saturatiore. (Long. corp. 5\ lin. • 

 Exp. Alar. Hi lin.) 



Ly. fasciata. Curtis, v.ix. pi. 381. — Steph. Nomen. 2d edit. col. 129. 



Head black; mouth and a somewhat triangular spot between the antennae, and 

 sometimes a dot behind each eye, yellow ; mandibles ferruginous at the 

 tip ; wing scales yellow ; abdomen black at the base, the membrane at the 

 edge of the basal segment yellowish, the 5th luteous in the middle, the 

 remainder entirely so, and all from the 3rd with a yellow spot on each side ; 

 legs yellow, base of coxse and of the 4 anterior femora black ; tarsi fulvous ; 

 antennae luteous at the base ; wings yellowish-brown, anterior with a darker 

 fascia arising at the stigma, which, with the nervures, is pitchy-black. 

 Taken at Darenth wood in the beginning of June, and at Ripley 



on the 30th of May last^ in a garden. 



