Jan., 1910.] Remarks on the Genus Scaphoideu.^t. 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. Mctcalf, to whom I am indebted for the 

 opporttmity 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 1900, but as stated in that paper, there are niany other variations 

 which defy description because of the insensible gradations repre- 

 sented between the different fomis. 



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 secitrcd 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 



