312 INSECTA SAUNDERSIANA. 



from the eyelets to the feelers : mouth pitchy, with a ferruginous tip ; palpi 

 ferruginous : feelers black ; third joint slightly deepeniug from near the 

 base to near the tip, ferruginous at the base, more than thrice the length of 

 the second joint, not reaching the epistoma ; sixth downy for half the length 

 from the base : c/iest and breast with a cinereous covering, excepting four 

 black stripes on the chest, the inner pair slender : abdomen spindle-shaped, 

 more than twice the length of the chest, pitchy on each side, where it is 

 adorned tvith four large subquadrate cinereous spots : legs black : wings 

 gray, brown along the fore border and about the borders of the veins ; veins 

 black, tawny at the base ; prsebrachial vein forming an obtuse angle at its 

 flexure, hardly curved inward by this, almost straight from thence to the 

 tip; lower cross-vein with two slight curves, the lower inward, the upper 

 outward: aluke whitish with pale yellow borders: halteres tawny with yel- 

 low knobs. Length of the body 8 lines ; of the wings 13 lines. 



South America. 



Dexia convexa, Fem. 



Nigra; caput argenteum ; thorax cervinus, nigra sexvittatus ; abdomen 

 fulvum, nigra vittatum ; antennte basi fulvce ; pedes fulvi, tarsis 

 nigris ; ahe cinerece, ad venas fuscw. 



Black : head with a silvery white covering, clothed beneath and behind 

 with pale yellow hairs ; crown fawn-colour ; frontalia brown, widening 

 from the eyelets to the feelers ; facialia without bristles ; epistoma promi- 

 nent : eyes bare: palpi tawny; feelers black; first and second joints 

 tawny; third black, linear, rounded at the tip, tawny at the base, not 

 reaching the epistoma, more than twice the length of the second ; sixth 

 slender, feathered with short hairs, stout at the base, more than twice the 

 length of the third : chest with a faivn-colour covering tvhich is interrupted 

 by six black stripes : abdomen oval, tawny, broader and a little longer than 

 the chest, with a black stripe widening at the base and more so towards 

 the tip which is wholly black : legs tuivny ; feet black : wings gray, brown 

 along the veins which are black, and at the base tawny ; praebrachial vein 

 forming an obtuse angle at its flexure, straight from thence till near the 

 tip where it is slightly bent inward ; lower cross-vein with the two curves 

 which are slight : alula gray, with pale yellow borders. Length of the 

 body 5 lines ; of the wings 11 lines. 



Brazil. 



