C 
150 Mr. E. E. Austen on Cutiterebra. 
It will thus be seen that the most conspicuous differences 
between the type of detrudator and that of nigricincta are, in 
the case of the former, the narrower abdomen, the paler and 
thinner pile on the last three segments, the much broader 
black band on the third and the presence of black pile on 
each side of the hind margin of the fourth segment; and on 
the thorax the absence of golden pile on the anterior surface 
and the almost entire absence of any indication of a semi- 
lunar patch of similar pile on the anterior margin of the 
dorsum. ‘T’he absence of golden pollen on the front of 
detrudator may be due to denudation, though the typical 
specimen, especially if we take its age into consideration, is 
in a good state of preservation. On the third and fourth seg- 
ments of the abdomen there is a tapering band of greyish 
pollen on each side (most conspicuous when the specimen 
is viewed from behind), as in the type of négricincta. 
Although I think it quite possible, or even probable, that 
my nigricincta will eventually prove to be the male of detru- 
dator, further material is imperatively necessary before the 
question can be decided with certainty. I therefore content 
myself for the present with having drawn attention to the 
differences between the typical specimens. 
Before proceeding to give a reprint of the original descrip- 
tions of Bracy Clark’s two species which are discussed above, 
it seems worth while to say a word or two as to the remark- 
able paper in which they appeared, as it is probable that very 
few living dipterists have ever seen a copy. ‘The paper in 
question, quoted by Brauer as “‘ Essay. Addenda... 1848,” 
and by Hagen (‘ Bibliotheca Entomologica’) as “ Addenda 
1848,” is a single page of quarto size, printed only on one 
side of the paper, and headed with the title given to it by 
Hagen, without any stop between the word and the date. 
‘“‘ Addenda 1848 ” is therefore its proper designation. The 
upper part of the page is devoted to a reprint of a ‘‘ Note on 
the Bot infesting the Stag ” [Pharyngomyia picta, Mg.], from 
‘ Zoologist,’ 1847, pp. 1569-1570. This, as originally pub- 
lished, was signed “ Bracy Clark,” but no signature what- 
ever appears on the “ Addenda 1848;” so that for proof of 
authorship we have to depend upon internal evidence. Above 
the “Note” it is stated that :—“‘ The following communica- 
tion was sent by me to the ‘ Zoologist’ of my friend Edward 
Newman, No. 1, for January, for the year 1847 ;” and, as I 
have just stated, the note as originally published was signed. 
References to “our Monograph, 2nd Supplement,” meaning, 
as pointed out by Westwood in a marginal manuscript note 
