in the Collection of W. W. Saunders, Esq. 225 



transverse vein and exterior part of praebrachial vein clouded 

 with dark brown ; halteres whitish. Male. —Hind tarsi wholly 

 black. 



Length of the body 4 — 5g lines; of the wings 10 — 12 lines. 



Valley of the Amazon. 



Ropalomera nebulosa. 



Fcem. — Nigro-fusca, capite ferrugineo, facie convexa nigra 

 nitente, thorace cinereo vittis quatuor incompletis, abdomine 

 e maculis albidis quadrivittato, pedibus nigris incrassatis, 

 tarsis testaceis apice nigris, alis cinereis nigricante macu- 

 latis. 

 Female. — Blackish brown ; head ferruginous on the vertex and 

 in front ; face convex, black, shining ; antennae black ; thorax 

 with cinereous tomentum, which is interrupted by four incomplete 

 stripes ; abdomen with four rows of whitish shining spots ; legs 

 black, incrassated ; tarsi testaceous, with black tips ; wings grey, 

 with many blackish, spots which are paler and finally obsolete 

 towards the interior border ; veins black ; halteres whitish. 

 Length of the body 3g lines ; of the wings 8 lines. 

 Valley of the Amazon. 



Ropalomera substituta. 



Foem. — Nigro-fusca, vertice antico fulvo, facie testaced, an- 

 tennis fulvis, thorace vittis quatuor auratis unaque cinered, 

 abdomine e maculis albidis quadrivittato, pedibus validis 

 subpilosis, tarsis basi testaceis subauiatis, alis cinereis, halte- 

 ribus albidis. 

 Female. — Blackish brown ; vertex tawny in front ; face testa- 

 ceous ; antennas tawny.; thorax with four gilded stripes and with 

 a middle cinereous stripe ; abdomen with four rows of whitish 

 spots ; oviduct black, shining ; legs stout, slightly pilose ; not 

 incrassated ; tarsi testaceous and slightly gilded at the base ; 

 wings grey, veins black ; halteres whitish. 



Length of the body 3| lines ; of the wings 7 lines. 

 Brazil. 



Genus DicHROMYiA, Desv. 

 Dlchromy'm ? putictipennis. 

 Mas. — Nigra,, nitens, capite ferrugineo, alis nigris albo-punc- 

 tatis, alulis niveis maximis. 



VOL. IV. N. S. PT. VI. — JAN. 1858. Q 



