48 Psyche {April 
coides of Meigen should be the type of the restricted Tachydromia. 
Coquillett however has designated conneaxa as the type, forgetting that 
part of Meigen’s cimicoides belonged to Linnaeus’ early species arro- 
gans. 'Vhis however will not invalidate the limitations of the restricted 
Tachydromia, as arrogans and connexa are very closely related spe- 
cies, certainly congeneric. 
The status of the old genus Tachydromia is therefore as follows. 
Front and middle femora thickened: Division B. Meigen. 
Platypalpus Macquart, Westwood, Blanchard, Walker, Schiner, Philippi, 
Coquillett, Melander. 
Tachydromia Meigen, Burmeister, Zetterstedt, Berendt, Scholtz, Bonsdorff, 
Loew, Bigot, Mik, Strobl, Becker, Kertész, Bezzi, Frey. 
Phoroxypha Rondani, Coquillett. 
Front femora thickened: Division A. Meigen. 
Amalcell) iMmperfectite remiss sip ieait eisai a's auetoe = Tachypeza Meigen, Loew. 
Anal cell completely wanting............ Tachydromia Meigen, Coquillett. 
Tachista Loew, Becker. 
The type species of these genera are as follows: 
Platypalpus. Type species cursitans Fabricius, indicated by Westwood in 
1840. It is quite likely that Westwood had Meigen’s original cursitans 
in view, in which case the type should be major Zetterstedt. 
Tachypeza. Type species nubila Meigen. Rondani in 1856 designated 
tt nervosa Meigen as the type, and this is a synonym of nubila. 
Tachydromia. Type species connera Meigen. As explained before Meigen 
indicated two species, cursitans and cimicoides. As the type species should 
be one of those originally listed by the describer elimination leaves cimi- 
coides as the type, since Meigen’s cursitans belongs to the subsequently 
erected genus Platypalpus. Meigen’s cimicoides included two species, 
arrogans Linnaeus and the later described connexa Meigen, the second of 
which Mr. Coquillett has designated as the type. 
During the last half century a number of other genera have been pro- 
posed for new material rather than as constrictions of the older genus. 
The relationships of these genera can be seen from the following 
synopsis of the present subfamily Tachydromiinae. All the known 
genera and sub-genera are included. 
