128 TNSECTA SAUNDERSIANA. 



or ten pale yellow spines : eyes hrouzed ; fore part flat, composed of very 

 large facets : sucker black, clothed at the tip with pale tawny hairs : palpi 

 black, beset with long black bristles : feelers black ; first and second joints 

 beset with short black bristles ; second joint not half the length of the 

 first ; third spindle-shaped, shorter than the first ; bristle nearly twice the 

 length of the third joint : chest dark tmvny, beset on each side and behind 

 with a few black bristles, adorned with four black stripes, of which the 

 inner pair are straight and entire, the outer pair irregular and interrupted ; 

 hind part hoary : breast pale tawny, with a hoary tinge: abdomen black, 

 more than twice the length of the chest, tapering, ending in a tail, which 

 is shining and compressed and about one-fourth of the whole length, 

 thinly clothed with hoary hairs, which abound most on each side at the 

 base ; sides and under side tawny, with a hoary covering : legs tawny, beset 

 with black bristles and spines, which are most frequent on the feet ; tips of 

 the thighs and of the shanks black ; feet dark tawny, black towards the 

 tips ; foot-cushions yellow : wings pale brown ; wing-ribs and veins black ; 

 stump on the vein between the submarginal areolets shorter than the inner 

 side of the angle whence it springs ; poisers yellow. Length of the body 

 10 lines ; of the wings 16 lines. 



South America. 



Erax Potamon, Mas. 



Ferrugineus, thoracis vittis quatuor abdomineque nigris, hujus apicefulvo, 

 antcnnis pedibusque nigris, tibiis fulns apice nigris, alis fuscis. 



Body black : head adorned in front Avith a tawny covering, whitish 

 and clothed with white hairs behind and beneath ; crown and hind part 

 beset with black bristles ; face very convex, beset with numerous stout 

 black bristles : eyes bronzed ; fore part nearly flat, composed of large 

 facets : sucker black, clothed at the tip with short tawny hairs ; palpi 

 black, clothed with long black hairs : feelers black ; first and second joints 

 beset with black bristles ; second not half the length of the first ; third 

 spindle-shaped, a little shorter than the first; bristle not twice the length 

 of the third joint : chest and breast adorned ivith a ferruginons covering ; 

 four black stripes on the chest, which is beset on each side and behind with 

 some black bristles ; breast with a hoary tinge : abdomen very slightly 

 tapering from the base to the tip, much narrower than the chest and about 

 twice its length, clothed for half the length from the base, and again to- 



