396 Dr. Hagen's and the Rev. A. E. Eaton's 
apex are suddenly contracted to a slender point. The 
appendages beneath it are linear, and are about half as 
long as the lobe. (From a specimen in Mr. Albarda's col- 
lection).] 
Page 87. Leptophlehia cincta. I believe E. halterata, 
Fab., to be a Canis ; and if the descriptions in the dif- 
ferent works of Fabricius be carefully compared with one 
another, I think my opinion will be established. In the 
diagnosis in Sp. Ins., Mant. Ins. and Ent. Syst., it is 
expressly stated, that the species has only two wings, 
though in Gen. Ins. this was only given in the description. 
Fabricius of course considered this to be an imjiortant 
character. The words " alas magnte" in Gen. Ins. are not 
afterwards repeated in Ent. Syst. ; and the words " mar- 
gine crassiori nigricanti," together with the arrangement 
of halterata before E. brevicauda, seem to be very agree- 
able Avith the supposition of its being a Ccenis. " Abdo- 
raine fusco," given in Gen. Ins., is a character presented 
by dead males only, and is afterwards rightly omitted. 
The " sctfB triplo" (Gen. Ins.), or "quadruplo longiores" 
(Ent. Syst.), is applicable only to the male. The citation 
from De Geer is apparently erroneous. 
[What led me to refer E. halterata Avith a query to 
Leptojddcbia cincta Avas my giving some importance to 
this citation of De Geer. Having accepted this refer- 
ence, I felt bound to reconcile the diagnosis of Fabricius 
with the species of De Geer. Accordingly I supposed 
that either " alje magnse" was equivalent to " large wings" 
(an expression implying the presence of a smaller pair), 
or I supposed that Fabricius' type had lost the posterior 
pair (a thing that has often occurred in my own collection, 
where Psocida used to provide me Avith di]:)terous examples 
of L. cincta, and of A^arious sorts of Baetis, ad libitum) ; 
and I further assumed, that Fabricius must haA^e counted 
the abdominal segments in this instance fi'om tail to head. 
If Fabricius' reference to De Geer is AA-orth nothing, these 
suppositions of mine are also of no A^alue, and Dr. Hagen's 
relegation of E. halterata to Ccenis is completely substan- 
tiated.] 
Page 88. Leptophlehia vespertina. I haA'c types of 
Zetterstedt's species. I used to think them to be identical 
AA'ith Pot. brunneus, Pict., but this must be A'erified. 
