24 DIPTERA OF NORTH AMERICA. [PART III. 



their figures. It seems to me that this species may belong to 

 the Drosophilidae. In the Berlin Museum there is a little fly 

 which apparently belongs to this genus ; I have not been able 

 to ascertain whether this species is Z. dispar, but I have seen 

 enough not to doubt in the least of its belonging to the Droso- 

 philidae. 



Dichromyia is wrongly placed by Macquart among the Hete- 

 rovujzidse, between Actora and Ccelopa. I will maintain for the 

 present its position among the Ortalidse, although I cannot deny 

 that a better place might perhaps be found for it ; however, no 

 such place has been pointed out yet. Besides the typical spe- 

 cies, Dichromyia sangitiniceps, Macquart has another species 

 from Africa, which, as I will show hereafter, cannot well belong 

 to this genus. 



About the genera which Macquart, in the Dipteres Exotiqaes, 

 places in the family Ortalidse, I will make the following re- 

 marks : — 



Oxycephala, as was mentioned before, is identical with Pyr- 

 gota. 



Loxoneura is established for Platystoma decora. 



Platystorna ismisusedfor the location of a number of hetero- 

 geneous forms ; whatever had broad wings, with a dark picture, 

 among the rest a Trypeta, was taken by Macquart for a Platy- 

 stoma. 



Camptoneura is a true ortalideous genus, based upon Trypeta 

 picta Wied. , and, as observed above, identical with Delphinia 

 Rob. Desv. Macquart has likewise used this genus for the 

 introduction of species not belonging there at all, for instance, 

 of Trypeta obscura Wied. 



Heterogaster (a preoccupied name) is a well founded genus in 

 the neighborhood of Pyrgota. 



Euripalpus (a hybrid name), judging from Macquart's data, 

 belongs to the Ortalidse. 



The genus Eniconeura (better Heniconeurd) is said to be 

 distinguished by its spurless middle tibias. If such were really 

 the case the genus could not belong to the Ortalidse, nor to any 

 of the allied families. But in Heniconeura fenestralis Macq., 

 I perceive at the end of the middle tibia? a rather strong spur, 

 which is closely applied to the tarsus when the latter is stretched 



