308 INSECTA SAUNDERSIANA. 



slightly so near the tip which is very near that of the cubital vein ; lower 

 cross-vein with two curves, the lower deeper than the upper : alulae white : 

 halteres tawny. Length of the body 6 lines ; of the wings 1 1 lines. 



Dexia dorsalis. 



Testacea ; caput anlice argenteum ; tJiorax niijro irivittatus, vitta media 

 Jlavo quadristrigata ; abdomen fulvum, cano-micans, nigro vittatum 

 et lateribus maculatum ; pedes fulvi, tibiis ferrugineis, tarsis nigris ; 

 alee cinerecB, ad costam fulvce ; venis fusco marginatis. 



Testaceous, slender, with a pale yellow covering : head clothed behind 

 and beneath with pale yellow hairs ; fore part silvery while ; frontalia deep 

 brown, linear, with a dark red streak ; mouth and palpi pale testaceous : 

 feelers testaceous ; sixth joint clothed with long hairs : chest with three deep 

 hroivn stripes, the middle one very broad, inclosing four yellowish streaks, 

 the inner pair united in front, dilated behind : abdomen tawny, with hoary 

 reflections, adorned with a black stripe, and on each side with a row of 

 black spots : legs taivny ; shanks ferruginous ; feet black : wings gray, 

 taivny along the fore border for half the length from the base, slightly tawny 

 along the borders of the veins ; veins pitchy, tawny towards the base and 

 along the fore border ; praebrachial vein forming a hardly acute angle at 

 its flexure, curved inward from thence along its whole length, especially 

 near the base ; lower cross-vein with two curves, the lower inward, the 

 upper outward and very slight : alulae whitisli with yellow borders : halteres 

 tawny. Length of the body 4 — 5 lines ; of the wings 8 — 10 lines. 



Var. Smaller, paler: frontalia red : shanks tawny : wings darker gray 

 beneath the fore border towards the tips ; praebrachiul vein forming a right 

 angle at its flexure. 



South America. 



Dexia muscaeia, Fem. 



Nigra, sat lata ; caput albidum ; thorax cervinus, nigro qnadrivittaius ; 

 scutellum et abdomen testacea ; abdomen nigro vittatum ; antenna 

 fulvce ; alee cinerea:, ad venas fusca. 



Black, rather broad : head with a whitish covering ; frontalia pitchy, 

 widening from the eyelets to the feelers ; facialia without bristles ; 



