228 THE CANADIAN ENTOMOLOGIST 



MISCELLANEOUS APHID NOTES 1. 



BY JOHN J. DAVIS, WEST LAFAYETTE, INDIANA. 



Heteroneura, new genus. 

 Erected for the species Aphis setaria Thomas, which is herewith designated 

 the type. The genus may be characterized as a typical Aphis excepting the 

 venation of the hind wings which have but a single cross-vein (Fig. 26). The 

 filament of antennal segment VI is quite long, being 6 to 8 times the length of 

 the base of this segment. Heteroneura is analogous to Carolinaia in the venation 

 of the hind wing and bears the same relation to the genus Aphis as Carolinaia 

 bears to the genus Rhopalosiphum (Siphocoryne) . The late Theo. Pergande 

 recognized this as a distinct genus, and used the name here adopted on his 

 slides of setaricE. 



Fig. 26. — Heteroneura setarix Thos. Hind wing. 



Aphis scotti Sand.^ is a synonym of setarice. The description of Aphis 

 prunicoleus Ashm.^ is a clear characterization of this species and should be 

 listed as a synonym. Aphis bituhercidata Wilson ^^ is also a synonym of setaricB 

 as determined by a comparison of the types by Wilson. 



The writer's collection contains setarice from Florida, Illinois, Indiana, 

 Iowa, Kansas, Louisiana, Missouri, New York, Oklahoma, South Carolina, 

 Texas and Wisconsin and our host records include, in addition to the reported 

 hosts, the following: corn, sugar cane, Eragrostis sp., Sorghastrum nutans, Pani- 

 cum capillare, Paspalum dilatatum, and Bermuda grass (Cynodon dactylon). 



Aphis heraclella, n. n. 



This new name is offered for Aphis heradii Co wen, preoccupied by Aphis 

 heraclei Koch. 



Aphis rociadae Ckll. 



What is considered the same as Cockerell's Aphis rociadcB^ was found 

 abundant on the flower stalks of Delphinium tricorne at Lafayette, Indiana, 

 May 9, 1913. The original description included only the apterous female, but 

 certain characters are so unusual and prominent there appears to be little question 

 as to the identity of our species. 



Winged viviparous female: Head, thorax and abdomen very dark brown, 



apparently black. At base of each cornicle brownish. In some specimens the 



abdomen is distinctly shining dark brown. Antennae and eyes .black. Legs 



pale brownish, blackish at apices of femora and tibiae, and tarsi black. Cornicles 



moderately dark brown. Wing veins black. 



 1. Bull. Ga. St. Bd. Ent., No. 17, p. 99, Oct., 1905. 



> 2. Pacific Rural Press, Vol. 22, No. 1, p. 8, July 2, 1881. 



V^- 2a. Ent. News, Vol. 25, No. 7, p. 298, 1 pi., July, 1914. 



^ 3. Trans. Amer. Ent. Soc, Vol. 29, p. 115, 190 J. I have since had an opportunity to 

 identify this species with certainty by comparing with the type, kindly loaned by A. C. Baker. 

 October, 1919 



