178 ENTOMOLOGICAL NOTES, 



and hind wings have various transverse nervures, forming a de- 

 cided although small portion completely reticulated. 



Inhabits North America. Taken by Mr. Foster, at Trenton 

 Falls, and presented to the Cabinet of the Entomological 

 Club. 



Perla Xanthenes. Lutea, alarum nervuris mx conspicuis ; 

 antetinis, pedibusque concolorihus : oculis ocelUsque nu/errimis: 

 prothorax quadratus, postice valde angustior. (Corp. long, 

 ad. '75 unc. ; alar, dilat. ad 1 '75 iinc.) 



Pale yellow ; the nervures of the wings very indistinct, and with 

 the antennae and legs of the same colour ; the eyes and ocelli 

 alone are black ; the prothorax is quadrate, but considerably 

 narrower posteriorly. 



Inhabits . Two specimens in the British Museum. 



Genus. — Isogenus, Nexvman. 



Isog. frontalis. Fusca, capite antice inter antennas, postice 

 ad verticem, Uneaque protkoracis longitudinali flams : proalce 

 hyalincB, fusco-tinctce , tmbeculd costali ultra medium, vix con- 

 spicud fused. (Corp. long. '77.5 unc; alar, dilat. 1*425 

 unc.) 



Perla bicaudata. Kirby. Fauna Boreali-Americana, part 

 Insects, p. 252. 



Inhabits the United States of North America. Taken by 

 Mr. Foster at Trenton Falls, and presented to the Cabinet of 

 the Entomological Club. 



Natural Order. ? 



Genus. — Mantoida, Newman. 



Caput transversum pronum ; cum oculis, thorace duplo latior : oculi 

 magni, laterales, rotundati ; antennae filiformes, corporis dimidio 

 longiores, multi-articulatae ; articulo basali magno, 2°. parvo, 3°. 

 elongate, caeteris brevissimis; ante medium leviterincrassatae ante 

 apicem pedetentim attenuantes apice ipso paullo incrassato et, ni 

 fallor, cheliformi, scd, dira calamitato, unica? antennae apex (unica 

 tantum erat !) examinando fractus et perditus : labrum elonga- 



