346 JOLTRXAL OP ECONOMIC ENTOMOLOGY [Vol. 2 



SOME NEW RECORDS OF APHIDIDAE IN NORTH 



AMERICA 



By H. F. Wilson. Agent and Expert 



INTRODUCTION 



In the following pages the writer desires to redescribe a little 

 known aphid which is remarkably divergent from other forms of the 

 family AphididjB and also to give data regarding two species known for 

 many years to occur in Europe but which have not been recorded 

 hereto from North America. 



A NEW APHIS ENEMY OP BANANAS 



Pentalonia nigronervosa CoquereP 



A species of Aphidge has been found very abundantly on banana 

 plants in the greenhouses of the United States Department of Agri- 

 culture and was without doubt imported on banana plants from some 

 country where this fruit is grown. 



Pentalonia nigronervosa Coq. 



Winged viviparous female (Fig. 1). — General color reddish brown, eyes 

 dark red, legs as long or longer than the body, antennae reaching beyond the 

 body and honey tubes ; antennae, nectaries and distal ends of the femora and 

 tibiae dusky red ; remaining parts of the legs opaque, with a slight reddish 

 tinge. 



Antennae situated on prominent tubercles, which are strongly gibbous on the 

 inner side ; segments 1 and 6 equal in length, 3 equal in length to 4 and 5 to- 

 gether, and both with ten or twelve round sensoria placed in a somewhat ir- 

 regular line along the inner side of the segment; 4 somewhat longer than 5 and 

 with six small sensoria, three of them near the middle and three toward the 

 distal end ; 7 long and slender, with two bristlelike hairs at the base ; wings 

 hyaline; veins distinct and bordered by dusky bands. 



Venation of the wings varying considerably in individuals and often in oppo- 

 site wings of the same specimen ; first and second oblique veins nearly parallel, 

 running transversely across the wing; cubital vein two-forked and distorted at 

 or near the second fork, where the stigmal vein joins it, the two forming a 

 single vein for a short distance, then separating and forming a distinct stigmal 

 and a cubital vein. The fusing of these two veins also forms a closed cubital 

 cell, which may or may not be called a true wing cell. 



Nectaries about as long as third autennal segment and reaching slightly be- 



^Am. Soc. Ent, France, p. 279 (1859). Fii 



