18 NEUROPTERA. 
Anything like a summary of the Odonate-fauna of this region must be left until 
the conclusion of the work. One remark may be made in this place. It is that the 
material which it has been possible to study reveals so many variations and data for 
discussion of general questions that I have thought it necessary to state, under each 
species, the number of individuals which I have actually examined in writing of them. 
Much, indeed, of the value of what I have here written depends on comparisons made 
from numerous, and not from a few, individuals. And on the other hand, it is to be 
understood that, where I cite localities without any statements as to the number of 
individuals, such citations are from pre-existing literature, or from manuscript com- 
munications, or from my own previous studies, and not from examinations made 
expressly for the present work. The reader who wishes to test my conclusions 
concerning any species has therefore to consult the list of localities quoted in order to 
learn the extent of the material on which my assertions are based. 
The terminology employed is, for the most part, that of my “ Introduction to the 
Study of the Odonata” (Transactions of the American Entomological Society, xx. 
pp. 152 a-218, Philadelphia, 1893). 
I. ZYGOPTERA. 
Front and hind wings similar in shape, or nearly so, without a membranule, with a 
quadrilateral. Males having the sternites of the eleventh abdominal segment developed 
as two clasping-organs—the so-called inferior, terminal, abdominal appendages. Nymphs 
with three caudal tracheal gills. 
AGRIONIDZ. 
Head transversely elongated, eyes separated from each other; lateral lobes of the 
labium two-jointed, middle lobe bifid. Females with genital valves. 
Synopsis of the Subfamilies. 
Median sector separating from the principal nearer to the arculus than to 
the nodus. 
Antenodals five or more, cross-veins in the postcostal area beginning _ 
before the level of the apex of the quadrilateral . . . . . . . 1. CaLopreryeina. 
Antenodals two, cross-veins in the postcostal area beginning at the 
level of the apex of the quadrilateral . . . 2 Lesrina. 
Median sector separating from the principal nearer to the nodus than to 
the arculus. 
Antenodals two to five, but usually two . . . . . «. - + « « « 8. AGRIONINE *, 
* The reasons leading to these modifications of the usual classification of the Zygoptera are discussed in an 
article entitled “On the Systematic Position of Thaumatoneura inopinata, McLachlan (Order Odonata), with 
some Remarks on the Classification of the Suborder Zygoptera,” which will shortly be published in the 
Entomologists’ Monthly Magazine (London). 
