156 Mr. F. Walker's Characters of undescribed Diptera 



Genus Pipiza, Fallen. 

 Pipiza Pica. 



Foem. — Nigra, nitens, oculis tomento albo marginatis, thoracis 



guttisquatuor lateralibus scutellique margine fulvis, abdomine 



subpiceo, femoribus basi piceis, tarsis albis apice piceis, alis 



limpidis, basi strigd contigua costali fasciaque abbreviata 



nigris, halteribus fulvis. 



Female. — Black, shining ; head with white tomenlum about the 



eyes ; face somewhat lurid in the middle ; thorax with two 



tawny dots on each side ; scutellum with a tawny border ; 



pectus hoary ; abdomen slightly piceous ; femora piceous towards 



the base ; tarsi white, with piceous tips ; wings limpid, black at 



the base and with an adjoining black costal streak which joins a 



black band, the latter is obsolete towards the hind border ; hal- 



teres tawny. 



Length of the body 4 lines ; of the wings 7 lines. 

 Valley of the Amazon. 



Pipiza divisa, 



Fcem. — Nigra, pectore cano, abdomine vittis duabus lateralibus 



ferrugineis, pedibus piceis, femoribus basi, genubus tarsisque 



subtus ferrugineis, alis limpidis, dimidio basali nigricante 



postic^ cinereo, halteribus fulvis. 



Female. — Black ; pectus hoary : abdomen with a ferruginous 



stripe along each side ; legs piceous ; femora at the base, knees 



and tarsi beneath ferruginous ; wings limpid, basal half blackish, 



excepting the hind border, which is grey ; alulae white ; halteres 



tawny. 



Length of the body 3| lines ; of the wings 6 lines. 

 Vera Cruz. 



Pipiza dolosa. 



Mas. — Nigra, pectore cinereo, abdomine nigro purpureo, alis 

 subcinereis dimidio basali antice nigricante, halteribus fulvis. 



Male. — Black ; pectus cinereous ; abdomen blackish purple ; 

 legs piceous; wings greyish, blackish along half the lengtli from 

 the base, except towards the hind border ; alulae white ; halteres 

 tawny. 



Length of the body 3 lines ; of the wings 6 lines. 



Valley of the Amazon. 



