No. 22.] HYMENOPTERA OF CONNECTICUT. 489 



°C. fraternus Howard. 

 An American parasite of Lecanium persicce. 



°C. lecanii Fitch. 



Recorded as an American parasite of the cosmopolitan Leca- 

 nium hesperidum. 



°C, flavoscutellum Ashmead. 

 Parasitic upon the same host as the preceding species. 



Encarsia Foerster. 

 Key to Species. 



Females. 



1. Tarsi of middle legs 4-jointed, fourth and fifth joints appar- 



ently coalescent 2 



Tarsi of middle legs distinctly S-jointed; club of antenna 

 not flattened, first funicular joint not swollen, pedicel and 

 first funicular joint subequal in length, first and second 

 funicular joints also subequal in length, flagellar stria- 

 tions barely discernible; anterior wings with a round bare 

 space below the stigma. Length 0.58 mm pergandiella 



2. Pedicel and first funicular joint subequal in length. Length 



0.63 mm lutcola 



Pedicel longer than first funicular joint, which is shorter 

 than the second Length 0.66 mm quaintancei 



E. luteola Howard. 



New Haven, 14 August, 1906. Bred from Aleyrodes coryli 

 (W. E. B.). 



°E. quaintancei Howard. 

 Reared from a species of Aleyrodes on Polygonum. 



°E. pergandiella Howard. 

 Bred from a species of Aleyrodes on Xanthium strumarium. 



Aphelinus Dalman. 

 Key to Species. 



1. Eyes not hairy; mostly yellow; pedicel one and one-half 



times as long as thick 2 



Eyes hairy; head jet black, rest of body mostly black. Length 

 about 1.2 mm mali 



2. Club of antennae three times as long as penultimate joint. 



Length 0.55-0.78 mm 3 



Club of antennae twice as long as penultimate joint. Length 

 about 0.65 mm mytilaspidis 



