WINNERTZ AND LOEW 
45 
things (‘ ich habe manches gesehen ’) that had escaped the atten¬ 
tion of others, and I have formed opinions on the systematic 
question, which may perhaps prove useful for its further study.” 
Loew, who was a zealous, one may say an impetuous, collector, was 
by no means an habitual observer of life (Loew as a collector I 
shall discuss in my Chapter XVI, “ Characterization of Loew as 
a Dipterologist ”). For this reason we have a right to suspect 
that the abundant material in observations from life, contained in 
Loew’s monograph, was largely due to unacknowledged contribu¬ 
tions of Winnertz. 
As to the “ opinions ” which Loew pretends to have formed “ on 
the systematic question,” he had likewise borrowed them from 
another author. Loew adopts, in his paper of 1850, the subdivi¬ 
sion of the Ceciclomyiidae which Rondani had introduced ten years 
earlier, in 1840, a subdivision which the same Loew (in the Stett. 
Ent. Zeit ., 1847, p. 146-147) had at first attempted to disparage 
in contemptuously calling it “splitting ” ( “Zersplitterung” )d 
There is very little doubt that this complete change of opinion 
within three years Loew likewise owed to his correspondence 
with Winnertz. 
It sounds like sarcasm, and probably was meant for it (upon the 
principle of humanum est odisse quern Icieseris'), when Loew, at the 
very beginning of his monograph of 1850 (p. 2) inserts the follow¬ 
ing grandiloquent passage: “ There is hardly any other science 
which, like Natural Science, can render as exact an account of the 
Masters who, during its gradual edification, have contributed their 
share of work to the different parts of the structure. Hence, the 
names of Old Masters are more faithfully remembered in this, than 
in any other science, and the veneration of these names, stamped 
as they are on each building-stone, has become for posterity a 
custom which I shall attempt to fulfil here, so far as the literary 
resources accessible to me will allow.” 
Crefeld, the residence of Winnertz, is a flourishing town, at a 
short distance from the Rhine, not far from Diisseldorf, and has 
now (1900) 106,000 inhabitants. It is an industrial centre for 
1 These facts will he reproduced with more detail in Chapter XIX, “ Camillo Ron¬ 
dani and his relations with Loew.” 
