Jan., 1910.] Remarks on the Genus Scaphoideus. 
259 
lucent, the claval veins approaching each other near the center, but without 
any distinct cross vein; the reflexed venis three, first ante-apical not stylate. 
Color, dark brown, mostly black beneath; vertex dark brown with light 
areas at the sides in the anterior half; face black with four white arcs on the 
upper half of the front; pronotum dark brown, two white spots on the ante- 
rior border; scutellum with four white points on the base, one at apex, and 
one each side midway from apex to base; elytral markings as in immistus, 
but darker; beneath black except median and lateral line on the venter, the 
basal part of the last ventral segment white, the lower part of femora and 
the tibiae whitish; tarsi annulated with white. 
Genitalia. Last ventral segment of the female long, produced and 
slightly notched on the posterior border, distinctly polished; ovipositor and 
pygofer dark brown with a whitish band near the tip. 
Described from a single specimen from Raleigh, N. C., taken 
in late May by Mr. Z. P. Metcalf, to whom I am indebted for the 
opportunity to describe it. 
Scaphoideus immistus Say. 
This species which stands as the type of the genus, was 
described by Say among the earlier descriptions of American 
insects, and was doubtless abundant at that time as it has been 
since. It is one of the most common species met with in many 
parts of the country, and its distribution is very extensive, spec- 
imens having been taken all .the way from the Atlantic to the 
Pacific coasts. It is especially abundant in the Mississippi Valley 
and seems to occur on quite a variety of plants. Notwithstanding 
its abundance its life history and the food plants of the larval 
stages have not been determined, a fact which makes it difficult 
to assign any definite limitations to the numerous varieties of the 
species. 
The species is one of the most variable in the genus, and some 
of the more definite of these varieties were described in my paper 
of 1 900, but as stated in that paper, there are many other variations 
which defy description because of the insensible gradations repre- 
sented between the different forms. 
Scaphoideus luteolus Van D. 
This species is pretty closely related to immistus, the charac- 
ters for its separation being indefinite, but depending mainly on 
the characters of the claval veins and the male genitalia. The 
distribution has not been modified by recent collections and no 
further information regarding the life history has been secured. 
Scaphoideus cinerosus Osb. 
No further data have been secured regarding this species. 
Scaphoideus melanotus Osb. 
This species which appears to have been very rare and which 
has been known hitherto only from the specimens in hand at the time 
of the original description, two of which were from Texas and one 
