262 Ins. 
NEUROPTERA. 
Perlidjj. 
Kolbe, H. J. Verzeichnis der Perliclce Westfalens. JB. westf. Yer. 
xi. pp. 31-33. 
A list of 24 spocies, with localities and general notes. 
Ephemeridce. 
Eaton, A. E. A Revisional Monograph of Recent Ephemeridce , or 
Mayflies. Part i. Tr. L. S. (2) iii. pp. 1-77, pis. i.-xxiv. 
The commencement of this long-expected elaborate work. Part i. 
begins with introductory remarks ; then follow chapters on the struc- 
ture of adult Ephemeridce in general, habits of the flies, oviposition 
and the egg, the young of the Ephemeridce , characters which have been 
used as bases of classification, but which are not fundamental, history 
of classification, table of the classification adopted ; after which the 
systematic portion is commenced. Each chapter is elaborated in a very 
minute manner. The author states that he has not found it necessary to 
depart in any material manner from the classification adopted by him in 
1871." He divides the Family into 3 “ Groups,” 9 “ Series,” and 14 “ Sec- 
tions.” Group I. is separated into 2 “ Series ” (i. comprising “ Sections ” 
of Palingenia and Polymitarcys ; ii., “ Section” of Ephemera ). Group II. 
has 4 “ Series ” and 6 “ Sections ” (i., of Potamanthus ; ii., of Leptophlehia 
and of Ephemerella ; iii., of Ccenis and of Prosopistoma\ iv., of Baetis). 
Group III. has 3 “ Series ” and 3 “ Sections ” (i., of Siphlurus and of 
Bcetisca ; ii., with one provisional “Section”; iii., of Atopopus and of 
Ecdyurus). The twenty-four plates are illustrative of details (chiefly 
generic) for the adult insects, and all after pi. viii. refer to genera to 
be treated upon in succeeding Parts. The systematic portion contained 
in Part i. refers to Group I. of the genera, and extends from Palingenia 
to Pentagenia in the following sequence : — Palingenia (subdivided into 
Palingenia , Anagenesia , and an unnamed subgenus, for ? P. atrostoma , 
Weber), Oligoneuria , Elassoneuria , Spaniophlebia , Lachlama , Ilomceo- 
neuria , Euthyplocia , Campsurus, Jolia , Polymitarcys , Hexagenia, Ephemera , 
and Pentagenia. Plates i.-viii. refer respectively to — i., Palingenia ; ii., 
Palingenia and Jolia ; iii., Oligoneuria , Elassoneuria, Spaniophlebia , Lach- 
lania , aud Homceoneuria ; iv., Euthyplocia ; v., Campsurus ; vi., Campsurus 
and Polymitarcys ; vii., Ilexagenia\ viii., Ephemera and Pentagenia. The 
remaiuing plates will be referred to in succeeding Records. 
\ 
Weyenbergh, H. Bijdrage tot de kennis der Zuid-Amerikaansche 
Ephemeriden. Tijdschr. Ent. xxvi. pp. 159-174, pi. x. 
J. A. Palmen, Morph. JB. ix. pp. 1-8, gives interesting details on the 
double (“paarig”) condition of the terminations of the sexual glands in 
Ephemeridce , which are double not only in the larvje in all stages, but also 
in the imagines, and in both sexes. Ordinarily, they are double the whole 
length, but occasionally transversely united in the 9th segment, still with 
double excretory ducts. 
