312 DIPTERA. 
southern part of America (Mission Scient. du Cap Horn, vi. Zool., Diptéres, Paris, 
1888). In the naked arista it seems to approach the Tachinine, but on account of the 
absence of macrochete on the abdomen the author has included it among the Muscine. 
I mention the genus because Giglio-Tos has placed in it a third species (H. grisea), 
from Mexico. 
Brauer and von Bergenstamm (Denkschr. k. Akad. der Wissensch. Wien, lvi. p. 161) 
are of opinion that /Tyadesimyia may belong to the family (stride, in the neighbour- 
hood of Cephenemyia and Rogenhofera. 
Group ANTHOMYINE. - 
This group concludes the long series of Muscide Calyptere. ‘The flies belonging 
to it have generally the same aspect of those of the preceding groups, but differ from 
them in the want of the apical cross-vein, the fourth vein not being curved upwards, 
but going in a linear or nearly linear direction towards the border of the wing, some- 
what below the tip. It must, however, be observed that this character cannot always 
be relied upon, as several Muscine present a similar form of neuration, and, on the 
contrary, in some genera of Anthomyine (e. g. Leucomelina) the fourth vein shows a 
strong tendency to an upward curvature *. 
In the Anthomyine the arista is sometimes plumose, but often simply pubescent or 
even bare. In some genera the eyes are contiguous or close together in the males, in 
others they are separated by the front in both sexes. The abdomen usually has no 
more than four visible segments, but sometimes a fifth segment becomes more or less 
conspicuous at the base; the macrochete are often more developed than in the 
Muscine. 
The genera of Anthomyine occurring in Central America may be tabulated as 
follows :— 
1. Eyes in the ¢ close together above, the front being reduced to a 
small triangle or at least much narrower than the transverse 
diameter of the eyes; in the g the front broader . . ... 2 
Eyes separated in both sexes, the front nearly or quite as broad as 
theeyes. 6 6 ee ee ee ee ee ee ee ee Bz 
* A new scheme for the separation of the Anthomyine, and also for the division of the Muscide Calypterze 
into groups, has been recently proposed by E. Girschner [Berliner ent. Zeitschrift, xxxviil. p. 207 (1893), and 
Ilustrirte Wochenschrift fiir Entomologie, p. 12 (April 1896)]. The number and disposition of the bristles 
on the thorax are treated by him as of primary importance, and a general modification of the system is the 
consequence. It isa valuable attempt to reform the most generally adopted, though defective, systematic 
arrangement of the Muscide Calyptere. For the purpose of the present work, however, it will be sufficient 
to retain the groups, and also that of the Anthomyine, as they are defined by Schiner in his ‘ Fauna Austriaca: 
Diptera. 
