300 ENTOMOLOGICAL NEWS. [ July, 16 
The “Hemipteroid” insects, or those usually designated as 
the “Hemiptera,” form a rather heterogeneous collection of 
insects, which arose from ancestors somewhat intermediate - 
between the Neuroptera and the Psocid line of development. 
They should be divided into at least two orders (possibly 
more) known as the Hemiptera proper and the Homoptera. 
The principal subdivisions of these groups are as follows: 
The four most primitive lines of descent of the Homopter- 
cus forms are those of the Fulgorids, Cicadids, Psyllids and 
Aphids. The Fulgoroides (Neurohomoptera) or Fulgorid 
group is an exceedingly primitive one, and is closely related 
to the Neuroptera, such Fulgoroid forms as Pochazia 
(Ricaniinae) having retained certain features strongly sug- 
gestive of a Neuropteron ancestry. The Fulgorid group is 
also related to the Trichoptera and Lepidoptera (and some- 
what distantly to the: Panorpids), but they are much more 
closely related to the Neuroptera. 
The Cicadoides (Euhomoptera) or Cicadid group, is close- 
ly related to the Fulgorid group, and has also retained cer- 
tain characters which show a relationship with the Ascala- 
phids and Chrysopid group. Together with the Fulgorid group, 
the Cicadoid forms are among the lowest of the Homoptera. 
The Psylloides (Mesohomoptera) or Psyllid group is quite 
closely related to the Cicadid group, as far as I am able to 
judge from the material available. They are also apparently 
related to the Coccid group, but this can be determined only 
after a more thorough study of intermediate forms. 
The Aphidoides (Clinohomoptera) or Aphid group is re- 
lated to both the Fulgorid and Cicadid group as well as to the 
Psyllids, etc. Their line of descent apparently arose from 
forms intermediate between the Neuroptera and Clinoptera 
(Psocids), and they have retained many features suggestive 
of the Psocids (Clinoptera) in particular. 
The Aleurodoides (Coniohomoptera) or Aleurodid group 
is closely related to the Fulgorid group. These insects have 
retained certain characters suggestive of affinities with the 
Coniopterygidae (Neuroptera), which is to be expected, since 
