ORTALID^E SYSTEMATIC DISTRIBUTION. 35 



quoted characters seem to point towards a relationship with 

 Platy stoma. But I am prevented from laying much stress upon 

 them by the small development of the clypeus and the not in- 

 crassated proboscis, characters which are not usual in the circle 

 of relationship of Platystoma. 



The typical species of the genus Dichromyia, proposed by 

 Rob. Desvoidy, is Wiedemann's Tetanops sanguiniceps from 

 Brazil. Macquart afterwards described a second species, Dichro- 

 myia caffra. I cannot approve of these two species being united 

 in the same genus. The front of D. caffra is much shorter, and 

 anteriorly it does not project as much in the profile as in D. san. 

 guiniceps; moreover the ocelli are wanting here, while the other 

 species has them, and the vertical diameter of their eyes is much 

 longer than the horizontal, while in D. sanguiniceps the hori- 

 zontal diameter exceeds the vertical; the scutellum is convex, 

 and the tegulse very large, while D. sanguiniceps has a flat 

 scutellum and small tegulas. Whether the longitudinal veins are 

 beset with bristles in the same manner in both species or not, 

 I cannot state positively; in D. caffra the first and third veins 

 are very distinctly beset with hairs ; in D. sanguinicej)s, if I 

 remember right, the first vein is beset with a hardly perceptible 

 pubescence, but I cannot positively affirm that such is the case. 

 But without insisting upon this difference, the others are sufficient 

 to justify a generic separation. For this reason I have established 

 for D. caffra Macq. a species generally found on an offensively 

 smelling plant, the new genus Bromophila. 



As to the final decision about the place of the American genus 

 Dichromyia, I must leave it in abeyance until I have an oppor- 

 tunity to examine both sexes of D. sanguinicep>s. 



The ovipositor of the species of Bromophila is much more re- 

 tracted than in the other genera of the present group ; and 

 although not flattened, it is not at all incrassated ; unfortunately 

 I have not been able to ascertain on any female specimen whether 

 the ovipositor ends in a simple point, as it seems to me it does. 

 Should this not be the case, the genus would not belong to the 

 Ortalidse at all. At present I cannot find a better place for it 

 than in the neighborhood of Pyrgota. 



I know of no other genera belonging to the Pyrgotina. At 

 present, therefore, the section is composed as follows : — 



1. Pyrgota Wied. ; 2. Adapsilia Waga. ; 3. Toxura Macq. ; 



