1925 ] 
Notes on Hippoboscidoe 
269 
difference with Ornithomyia is the absence of the mediastinal 
[auxiliary; Sc] in that genus, where it is fused with the subcostal 
[first longitudinal; Ri] [This is an error, as the auxiliary vein is 
present in Ornithomyia also. — J. B.] The transverso-basal 
[humeral cross- vein; h] is more perpendicular in Ornithomyia. 
It appears that in that genus an incomplete vein starts from the 
point where the cubital [third longitudinal; R 4 +s] ends in the 
fore margin, and runs with a strong curve toward the tip of the 
wing, cutting off part of the first posterior cell [R 5 ], but incom- 
pletely, since, as I have said, this rudiment of vein does not reach 
the margin itself. It also seems that in Ornithomyia the fore 
margin is bordered by a vein to within a short distance from the 
tip, a feature not seen in Lynchia [Neither this nor the foregoing 
feature of the wing exist in Ornithomyia. — J. B.] In addition in 
Ornithomyia there is a first transverso-posterior vein, which is 
found at about the level of the transverso-discoidal [anterior basal 
cross-vein; M 3 ], of which it appears the continuation, forming 
with it a figure resembling S, and it is especially this feature 
which makes an important difference in that part of the wing, 
when the two genera are compared [In Ornithomyia the anterior 
cross-vein and the anterior basal cross-vein are close to each 
other, whereas in Lynchia they are far apart. — J. B.] In Orni- 
thomyia there seems to be also a second transverso-posterior 
vein [posterior basal cross- vein; Cu 2 ], placed very near the ar- 
ticulation, between the anal [sixth longitudinal; An] and the 
posterior [fifth longitudinal; M 8 +CuJ, immediately beyond the 
bifurcation of the common posterior [sub-stem vein] into dis- 
coidal [fourth longitudinal; Mi + 2 ] and true posterior [Cu 2 is 
present in Ornithomyia, absent in Lynchia. — J. B.] As I have 
said before, these cross-veins are entirely lacking in Lynchia. 
Tarsi as elsewhere throughout the family; halteres as in Ornitho- 
myia. ” 
Weyenbergh adds that he uses Schiner’s orismology of the 
wing venation, as set forth by van der Wulp (1871), and that 
the peculiarities of the wing of Ornithomyia, which he introduces 
for comparison, are taken from Meigen’s drawing of that species. 
This explains some of the erroneous interpretations which I have 
pointed out. Weyenbergh failed to notice that the “first trans- 
