958 CHARLES PauLt ALEXANDER 
T. maculipennis Say is probably T. angusitpennis Loew but the species 
is in doubt. Specimens in the Harris collection of the Boston Society 
of Natural History are determined by Say, tho not of the original series, 
and these are 7’. angustipennis or close to it. However, the description 
of the species shows that it differs in several important respects from all 
specimens of 7. angustipennis that the writer has seen, and it seems 
that the species must for the present remain in doubt. 
