THE MONTHLY BULLETIN. 247 



Hosts. — The larvae appear to make little or no distinctions as to aphid 

 species and feed upon a great many, among which are : the green citrus 

 aphid {Macrosiplvum citrifolii Ashm.), the orange aphid (Toxoptera 

 aurautke Koch), the melon aphis {Aphis gossypii Glover) and the black 

 peach aphis {Aphis persicce-niger Smith). 



Fig. 242. — The large syrphid fly (Lasiophthicus pyrastri Linn.). A, larvae; B, pupa- 

 riiim from which adult has emerged; C, adult. (Essig, P. C. Jr. Ent. ) 



THE AMERICAN SYRPHID FLY. 



Syrphus americaniis Wied. 

 (Fig. 243.) 



General Appearance. — In general this species greatly resembles 

 Lasiophtliicus pyrastri Linn, in shape and color, though it is somewhat 

 smaller. The eyes are dark reddish-brown ; face amber yellow with a 

 dark band in the middle extending from the base of the antenna to the 

 mouth ; antennse black, with dorsal arista ; thorax iridescent green, 

 covered with fine, long hair ; legs amber with bases dark ; abdomen rich, 

 shiny black with three pairs of transverse yellow broken bands along 

 the dorsal margins. These bands do not unite in the middle by one half 

 their lengths. There are also two very narrow transverse yellow bands 

 extending across the dorsum near the posterior end of the abdomen. 



