20 
to Pseudorthosia but for the reduced fore-tibial spining; then the aberrant 
Pseudo spaelolis with tibial spilling as in the preceding genus but with 
fourth tarsal row absent, and Peridroma with similar spining but a type of 
harpe that leads over to the Graphiphora-Anomogyna section. 
Again an interpolation follows of the genera Caradrina and Chersotis, 
with peculiar free arm at base of sacculus, and Heptagr'otis, in which the 
harpe is entirely absent; following this we reach the Craphiphora section 
in which the fore-tibial spining becomes more and more reduced and the 
fourth tarsal row is always absent; this includes Diarsia, Craphiphora, 
Pachnohia, Setagrotis, and Anomogyna. 
Then a few hairy-eyed genera of southwestern distribution are intro- 
duced; they bear no particular connexion with any group, although the 
type of harpe is more or less that of Agrotis; these are Trichagrotis, Tricho- 
feltia, Trichorthosia, and Mimobaraihra. 
Adelphagrotis again connects up w T ith the Euxoa section, the fore- 
tibial spining being practically absent, whereas Aplectoides , Anaplectoides, 
Protolampra, and Pseudoglaea show a modified Agrotis type of harpe with 
the fore-tibial spining much reduced or lacking, and the last-named genus 
with the spines of the fore tarsus strengthened to form small claws. 
Cryptocala and Eueretagrotis once more bring us back to the Euxoa 
group, whereas the final group of genera, Hemigraphiphora, Abagrotis, 
Rhynchagrotis , and Pro?wctua, present a modified and mostly much reduced 
harpe of the Craphiphora type, along with entirely unspined fore tibiae. 
This last group need not, however, be necessarily considered to represent 
the most primitive type of Agrotid; to the writer, it is much more likely 
that, through the reduction or elimination of certain characters, the species 
have evolved from Craphiphora- like ancestors. 
In order to facilitate the study of the genitalic structures of the group 
the writer has given figures in nearly every instance of the male genitalia 
of the genotypes, or, if not of the genotype, at least of a typical member 
of the respective genus. In a few cases for the sake of clarity the aedoeagus 
has been omitted from the drawing, but wherever it presented characteristic 
features it has been included. 
In conclusion the writer wishes to express his cordial appreciation of 
numerous kindnesses received from Dr. Wm. Barnes, Decatur, 111., who 
has unreservedly placed his magnificent collection at the writer’s disposal 
and has greatly facilitated in consequence this present study. Thanks 
are also due Dr. Wm. Schaus, of the United States National Museum, and 
Mr. W. H. T. Tams, of the British Museum, for their ready response to 
all queries addressed to them. 
SPECIES NOT EXAMINED OR UNPLACED 
Noctua bolteri Sm. — -Placed by Hampson in Agrotis. 
Mythimna subporphyrea Wlk. — -Placed by Hampson in Agrotis. 
Psaphara interclusa Wlk. — -Placed by Hampson in Epipsilia, but 
Psaphara is probably worthy of generic rank. 
Agrotis bollii Grt. ( hilaris Grt.) — Placed by Hampson in Epipsilia. 
Judging by the figure and by a sketch of the right clasper of the type, 
received from Mr. W. H. T. Tams, it looks as if it might fall near badinodis 
Grt. 
